Eglwyseg
Dee
Mid, Small, Calcareous

Worthenbury Brook - lower
Dee
Low, Medium, Calcareous

Clywedog - Dee to Gwenfro
Dee
Low, Small, Calcareous

Aldford Brook
Low, Small, Calcareous

Morwynion
Mid, Small, Calcareous

Alyn - Hope to confluence with Dee
Mid, Medium, Calcareous

Un-named - Lligwy catchment
Western Wales
Low, Extra Small, Calcareous

Ceint
Western Wales
Low, Small, Calcareous

Crigyll
Western Wales
Low, Small, Siliceous

Alaw
Low, Small, Siliceous

Un-named - Wygyr catchment
Low, Extra Small, Siliceous

Goch Dulas
Low, Small, Siliceous

Un-named - Braint/Cadnant/Lleiniog catchment
Low, Extra Small, Siliceous

Un-named - Crigyll/Caradog catchment

Nodwydd
Low, Extra Small, Siliceous

Wern Y Wylan

Lleiniog

Wettenhall Brook
North West

River Weaver ( Barnett Brook to Marbury Brook)
North West
Low, Small, Salt

Elwy - un-named tributary below Afon Gallen
Mid, Small, Calcareous

Nant Melai

Dulyn
Mid, Small, Siliceous

Meirchion

Elwy - Melai to Gallen

Aled - Elwy to Deunant

Hiraethlyn

Roe
Mid, Small, Siliceous

Un-named to Conwy estuary east

Pulford Brook

Henlake Brook

Balderton drain

Sandycroft Drain

Alyn - Rhydymwyn to Leadmill
Mid, Medium, Calcareous

Alyn - Leadmill to Hope, US STW
Mid, Medium, Calcareous

Lligwy

Tan R'Allt

Also includes Clatter Brook.
North West

River Gowy and tribs (Source to Milton Brook)

Dulas - upper

Dulas - un-named tributary

Gyffin

Nant Y Flynnon
Low, Extra Small, Calcareous

Nant y Groes
Low, Extra Small, Calcareous

Wydden

Un-named Conwy estuary west

Dulas - lower

Worthenbury Brook - upper

Emral Brook - lower

Worthenbury Brook - middle

Dee - Alwen to Outlet Llyn Tegid/ Bala Lake
Mid, Medium, Siliceous

Wych Brook

Dolfechlas Brook

Lead Brook

Emral Brook - un-named tributary from Hanmer

Emral Brook - upper

River Gowy (Milton Brook to Mersey)
Low, Medium, Calcareous

Stanney Mill Brook

Milton Brook

Salters Brook

Barrow Brook

Ashton Brook

Peckmill Brook, Hoolpool Gutter at Ince Marshes.

Kelsterton Brook

Rivacre Brook

Ash Brook (Source to Darley Brook)
Low, Small, Salt

Twrch
Mid, Small, Siliceous

Morlas Brook

Ceiriog - upstream of Teirw

Teirw

Ffrauer

Merddwr (Dee)

Medrad

Ceirw - Alwen to Medrad

Un-named - Wygyr catchment

Wygyr

Goch Amlwch

Dee - above Afon Lliw

Ganol

Clwyd - un-named tributary below Ystrad

Wheeler - upper

Wheeler - lower

Wheeler - un-named upper tributary

Bach

Clwyd - tidal limit to Hesbin
Low, Medium, Calcareous

Un-named Dee Estuary south

Un-named Dee Estuary South

Finchetts Gutter

Swinchiard Brook

Greenfield Stream

Burton Brook

Shotwick Brook

Clywedog - above Black Brook

Gwenfro

Alwen - Ceirw to Brenig

Alwen - above Afon Brenig

Arrowe Brook and The Fender also included.

Ceirw - Medrad to Nug

River Weaver (Marbury Brook to Dane)

Darley Brook

Ceirw - above Nug

Clywedog - Gwenfro to Black Brook

Black Brook

Nug

Cegidog

Brenig - west of Brenig reservoir

Brenig - east of Brenig reservoir

Terrig

Alyn - upper river above Rhydymwyn

Glyn

Dee - Inlet Bala Lake to Afon Lliw

Caletwr

Lliw

Hirnant

Llafar

Ceidiog

Llynor

Tryweryn - Dee to Mynach
Mid, Medium, Siliceous

Ceiriog - confluence Dee to Teirw
Mid, Medium, Siliceous

Tryweryn - Mynach to Hesgin

Shell Brook

Trystion

Edleston Brook
Low, Small, Salt

Bickley Brook

Un-named Clwyd estuary west

Gele

Glanfyddion Cut

Rhyl cut

Prestatyn Gutter

Elwy - Clwyd to Afon Melai

Dee - Chester Weir to Ceiriog
Mid, Large, Calcareous

River Duckow

Y Garth

Barnett Brook (Sales Brook to Weaver)

Barnett Brook (Source to Sales Brook)

Audlem Brook

Rhyd Y Valley

Braint - lower

Ffraw

Sales Brook

Llugwy - Conwy to Nant gwryd

Nant y Goron

Llugwy - Nant gwryd to Ffynon Llugwy

Crafnant

Ddu

Tryweryn - Llyn Celyn to Llyn Treweryn Inlet

Meloch

Dee - outlet Bala Lake to inlet Bala Lake

Tryweryn - Hesgin to Llyn Celyn

Mynach

Hesgin

Trefnant Brook

Conwy - tidal limit to Merddwr

Iwrch

Alltwalis - headwaters to confluence with Gwili

Duad - headwaters to confluence with Gochen

Dewi Fawr - headwaters to confluence with Cynin

Cywyn - headwaters to confluence with Cynnen

Unnamed - headwaters to tidal limit, Pwllstrodur

Unnamed - headwaters to tidal limit, Abermawr

Brynberian - headwaters to confluence with Nyfer

Gwaun - headwaters to tidal limit

R Tern - conf Coal Bk to conf Bailey Bk
Severn

R Lugg - conf Norton Bk to conf R Arrow
Severn

Norton Bk - source to conf R Lugg
Severn

Bleddfa Bk - source to conf R Lugg

Lime Bk - source to conf R Lugg

Clywedog Bk - conf Bachell Bk to conf R Ithon

Nantmel Dulas - source to conf R Ithon

Gallen

Cledwen

Deunant

Aled - above Deunant

Lledr

Ystrad

Porth-llwyd

Dee - Ceiriog to Alwen

Camddwr

Clettwr

Einion

Serw

Conwy - Serw to Llyn Conwy

Caletwr (Conwy)

Conwy - Caletwr to Serw

Conwy - Merddwr to Caletwr

Machno

Merddwr (Conwy)

Nant gwryd

Cefni - tidal limit to Ceint

Braint - upper

Cadnant

Cefni - Ceint to Cefni reservoir

Cefni - Cefni reservoir east

Cefni - Cefni reservoir west

River Weaver (Source to Marbury Brook)

Burland and Brindley Brook

Rookery Brook, Source to Burland and Brindley Bk.

Rookery Brook, Burland and Brindley Bk. to Weaver

Alwen - Dee to Ceirw

Gelyn

Dungrey Brook

Eitha

Bailey Bk - source to conf R Tern

Tintern Bk - source to conf R Wye

Mounton Bk - source to R Severn Estuary

Norton Bk - source to conf R Monnow

R Monnow - conf Escley Bk to conf Afon Honddu

Llanymynech Bk - source to conf R Trothy

Lugg Bk - source to conf Bleddfa Bk

R Aran - source to conf R Ithon

Bachell Bk - source to conf Clywedog Bk

Camddwr Bk - source to conf R Ithon

R Ithon - conf Gwenlas Bk to conf Camddwr Bk

R Ithon - conf Llaethdy Bk to conf Gwenlas Bk

Llaethdy Bk - source to conf R Ithon

Gwenlas Bk - source to conf R Ithon

Nant Bargod Rhymni - source to conf Rhymney R

Cwmystradllyn

Erch - upper

Dwyfach

Dwyfawr - upper

Soch

Erch - un-named tributary

Goedol

Gwili - Duad conf to conf with Tywi at spring TL
Low, Medium, Siliceous

Duad - conf with Gochen to confluence with Gwili

Allt y Gelli - headwaters to tidal limit

Cywyn - conf with Cynnen to conf with Nant Coedcae

Nant Coedcae - headwaters to confluence with Cywyn

Cynnen - headwaters to confluence with the Cywyn

Clywedog Bk - source to conf Bachell Bk

R Taff - conf Rhondda R to Castle Street

Rhymney R - conf Nant Cylla to Chapel Wood
Low, Medium, Siliceous

R Taff - conf Taf Fechan to conf R Cynon

Afon Cynon - source to conf Aman R

War Bk - source to conf R Perry

Unnamed trib - source to conf R Perry

Sleap Bk - source to conf unnamed trib

Un-named tributary Dwyryd
Mid, Extra Small, Siliceous

Cynfal

Gwendraeth Fawr - Afan Goch to tidal limit

Saundersfoot Stream - headwaters to tidal limit

W. Williamston Stream - headwaters to tidal limit

Teague's Wood Stream - HW to tidl limit, Marros

Castle Stream - headwaters to tidal limit, Amroth

New Inn Stream - headwaters to tidal limit

Unnamed - headwaters to tidal limit, Nr Pendine W.

Colby - headwaters to tidal limit, Amroth

Ford's Lake - HW to tidal limit, Wiseman's Bridge

Unnamed - HW to TL, DS Milford Oil Refinery

Dale Stream - headwaters to tidal limit

Teifi - Camddwr conf to Nant Wern-macwydd conf

Howni - headwaters to tidal limit

Saith - headwaters to tidal limit

Gilwen - headwaters to tidal limit

Teigl

Wen (Lleyn Peninsula)

Clun - HW to tidal limit, Aberbach, Dinas Cross

Nyfer - conf with Brynberian to conf with Duad

Goodwick Brook - headwaters to tidal limit

Unnamed - HW to tidal limit, Aberbach, nr Abermawr

Hengwm

Un-named tributary near Afon Artro

Nantcol

Artro

Dulas South - upper

Un-named trib south of Afon Dyffryn-Gwyn

Llyfnant

Dulas South - middle

Crewi

Dulas South - lower

Caseg

Un-named to Menai Strait south
Mid, Extra Small, Siliceous

Ogwen - lower

Un-named to Menai Strait south

Gyrach
Mid, Extra Small, Siliceous

R Roden - conf unnamed trib to conf Sleap Bk

Limpin Lake - HW to tidal limit, Cleddau Estuary

Unnamed - HW to tidal limit, N. of Garon Pill

Llangwm Pill - HW to tidal limit, Cleddau Estuary

Unnamed - HW to TL, Sandy Haven Pill, Sandy Hill

Unnamed -to TL, Cleddau Est S of Landshipping Quay

Waddock Lake - headwaters to conf with Cresswell

Unnamed - HW to TL, Cleddau Estuary, Martletwy

Unnamed - headwaters to tidal limit, Mwnt beach

Gwrddon - headwaters to tidal limit

Hoffnant - headwaters to tidal limit

Hawen - headwaters to tidal limit

Gwili - headwaters to confluence with Aeron

Ffynnon-Ddewi - headwaters to tidal limit

Soden - headwaters to tidal limit

Twymyn - upper

Iaen - lower

Nant Gwydol

Iaen - upper

Pennal

Twymyn - lower

Rhiwsaeson

Dyfi - tidal limit to Afon Twymyn

Un-named tributary near Afon Dysynni

Bronyn - headwaters to tidal limit

Coran - headwaters to tidal limit

Llansteffan Stream - headwaters to tidal limit

Morfa-bach Stream - headwaters to tidal limit

Nant Cwmyrarian - headwaters to tidal limit

Llanddowror Brook - headwater to conf with Taf

Coch-y-barlya - headwaters to tidal limit

Cegin

Aber

Un-named to Conwy Bay

Cynin - headwaters to tidal limit

Bran - confluence with Ydw to confluence with Tywi

Dulas - headwaters to confluence with Sannan

Sannan - headwaters to confluence with Dulas

Bran - headwaters to confluence with Ydw

Dulais - conf with Ddu to confluence with Tywi

Dulais - headwaters to confluence with Ddu

Nyfer - headwaters to confluence with Brynberian

Cwmfforest - HW to tidal limit, Aberfforest

Rhigian - headwaters to tidal limit, Aber Rhigian

Clydach - headwaters to confluence with Nyfer

Unnamed - headwaters to tidal limit, Strumble Head

Unnamed - HW to TL, Cwm-yr-Eglwys, Dinas Head

Un-named trib north of Afon Dyffyn-Gwyn

Treen Bridge Lake - HW to TL, Cleddau Estuary

Williamston Pill - HW to TL, Cleddau Estuary

St Ishmaels Stream - HW to tidal limit, Monk Haven

Marloes Stream - headwaters to tidal limit

Broadmoor Stream - HW to tidal limit, Mill Haven

Unnamed - HW to TL, conf with W.field Pill

Hay Dulas Bk - source to conf R Wye

Clyro Bk - source to conf R Wye

Clettwr Bk - source to conf R Wye

Yazor Bk - source to conf R Wye

R Duhonw - source to conf R Wye

Bach Howey Bk - source to conf R Wye

Willersley Bk - source to conf R Wye

Nant y Wilcae - source to conf Olway Bk

Clawdd Bk - source to conf R Usk

Nant Onnau - source to conf R Usk

Nant Cleisfer - source to conf R Usk

Afon Crawnon - source to conf R Usk

Grwyne Fawr - conf Grwyne-Fechan to conf R Usk

R Gavenny - source to conflence R Usk

Caerfanell - source to conf R Usk

Afon Hydfer - source to conf R Usk

Nant Menasgin - source to conf R Usk

Afon Cynrig - source to conf R Usk

Dafen Pill - headwaters to tidal limit

Gwril

Tafalog

Dyfi - Afon Twymyn to Afon Dugoed

Taf - headwaters to confluence with Cynin
Low, Medium, Siliceous

Marlais - headwaters to confluence with Tywi

Cothi - headwaters to confluence with Tywi

Mynys - headwaters to confluence with Tywi

Pyrddin - headwaters to conf with Nedd Fechan

Neath - conf with Nedd Fechan and Mellte to TL

Mellte - Llia and Dringarth conf to Hepste conf

Hepste - headwaters to confluence with Mellte

Nedd Fechan - conf with Senni to conf with Pyrddin

Llia - headwaters to confluence with Mellte

Dringarth -headwaters to confluence with Mellte

Neath Bk - source to conf Bele Bk

Afon Twrch - source to conf Afon Banwy

Afon Cownwy - source to conf Afon Vyrnwy

Nant Llwydiarth - source to conf Afon Vyrnwy

Nant Alan - source to conf Afon Cain

The Brogan - source to conf Afon Cain

Afon Cain - conf The Brogan to conf Afon Vyrnwy

Afon Vyrnwy - conf Afon Tanat to conf R Severn

Afon Cain - conf Nant Fyllon to conf The Brogan

Afon Hirddu - source to Lake Vyrnwy

Scithwen Bk - source to conf R Wye

Preston Bk - source to conf R Wye

Ydw - headwaters to confluence with Bran

Tywi (Llandovery Bran to Cothi confl)

Ddu - headwaters to confluence with Dulais

Gwydderig - conf with Bran to confluence with Tywi

Nant Duad - headwaters to confluence with Nyfer

Unnamed - HW to tidal limit, Newport Beach, N. end

Nyfer - Confluence with Nant Duad to tidal limit

Ceibwr - headwaters to tidal limit

Anghof - headwaters to conf with Western Cleddau

W. Cleddau - Cleddau N conf to Stonehall stm. Conf

Nant y Bugail - headwaters to conf with Cleddau N.

W. Cleddau - headwaters to conf with Cleddau North

Cleddau N. - headwaters to conf with Nant y Bugail

Cleddau N. - Nant y Bugail conf to W. Cleddau conf

Fathew

Nant Carfan

Ceirig

Dysynni - lower

Nant Cwm

Dunant - headwaters to confluence with Tywi

Dulais - headwaters to confluence with Tywi

Gwenlais - headwaters to confluence with Tywi

Tywi - conf with Doethie to conf with Gwydderig

Tywi - Llyn Brianne to confluence with Doethie

Pysgotwr Fawr - headwaters to conf with Doethie

Doethie - Pysgotwr Fawr conf to conf with Tywi

Prysor

Un-named to Glaslyn estuary north

Unnamed trib - source to conf Afon Senni

Afon Senni - source to conf unnamed trib

Afon Senni - conf unnamed trib to conf R Usk

Afon Tarell - source to conf R Usk

Afon Crai - source to conf R Usk

R Clydach - source to conf R Usk

Grwyne-Fechan - source to conf Grwyne Fawr

R Usk - source to conf Afon Hydfer

R Usk - conf Afon Hydfer to conf Afon Crai

Caswell Stream - headwaters to tidal limit

Oxwich Marsh Stream - headwaters to tidal limit

Bishopston Stream - headwaters to tidal limit

Hillend Stream - headwaters to tidal limit

Pennard Pill West - headwaters to tidal limit

Pennard Pill East - headwaters to tidal limit

Leason Pill - headwaters to tidal limit

Brynmill Stream - headwaters to tidal limit

Hirnant - source to conf Afon Tanat

R Morda - conf unnamed trib to conf Afon Vyrnwy

Llannant Pill - headwaters to tidal limit

Nant y Garreg - headwaters to tidal limit

Nant Dyfatty - headwaters to tidal limit

Tre-Beddrod - headwaters to tidal limit

Barnaby Pil - headwaters to tidal limit

Dafen - headwaters to tidal limit

Mewslade Stream - headwaters to tidal limit

Pennard Pill - un-named conf in Parkmill to TL

Afon Einion - source to conf Afon Banwy

Afon Banwy - conf Afon Gam to Afon Vyrnwy

Nant Fyllon - source to conf Afon Cain

R Vrynwy - Lake Vrynwy to conf Afon Cownwy

Eunant - source to Lake Vyrnwy (Pont Eunant)

R Morda - conf unnamed trib to conf unnamed trib

Sundorne Bk - source to conf R Severn

R Edw - conf Clas Bk to conf R Wye

R Irfon - conf Tirabad Dulas to conf R Wye

Kinnersley Bk - source to conf R Wye

R Wye - conf Walford Bk to Bigsweir Br
Mid, Large, Calcareous

Castle Pill - headwaters to tidal limit

Tyweli - headwaters to confluence with Talog

Cneifa - headwaters to confluence with Cych

Cych - headwaters to confluence with Cneifa

Cych - confluence with Cneifa to confluence Dulas

Siedi - headwaters to confluence with Teifi

Dulas - headwaters to confluence with Cych

Talog - headwaters to confluence with Tyweli

Tyweli - headwaters to confluence with Teifi

Cadair

Dysynni - upper

Mawddach estuary south

Angell

Dyfi - Dugoed to Cerist

Dulas North

Dugoed - lower

Dyfi - Cerist to Cywarch

Dugoed - upper

Cerist

Mydyr - headwaters to confluence with Aeron

Ceri Brook - headwaters to tidal limit

Aeron - confluence with Gwili to tidal limit

Arth - headwaters to tidal limit

Drywi - headwaters to tidal limit

Cwinten - headwater to tidal limit

Unnamed - HW to TL via Morfa Mawr Farm S of Llanon

Great Pill North Gower - headwaters to tidal limit

Morlais River - headwaters to tidal limit

Nant Cedi - headwaters to tidal limit

Tawe - conf with Nant Cwmgelli to tidal limit

R Perry - conf Tetchill Bk to conf R Severn

Afon Eirth - source to conf Afon Tanat

Afon Tanat - conf Afon Rhaeadr to conf Afon Vyrnwy

Un-named to Caernarfon Bay South

Gaseg - lower

Gaseg - upper

Glaslyn - Croesor to Nanmor

Glaslyn - tidal to Afon Croesor

Nant Gwrtheyrn

Croesor

Nant Cwm Croes y Ceiliog - HW to Tidal Limit

Mwche Stream - headwaters to tidal limit

Marlais - headwaters to confluence with Taf

Fernhill Brook - headwaters to tidal limit

Nant Pibwr - headwaters to tidal limit

Maes-y-lan - headwaters to tidal limit

Cennen - headwaters to confluence with Tywi

Tywi - confluence with Cothi to spring tidal limit
Mid, Large, Siliceous

Weir Bk - source to conf R Severn

Unnamed trib - source to conf Afon Tanat

Unnamed trib - source to conf R Morda

Afon Cedig - source to Lake Vyrnwy

Afon Tanat - conf Afon Eirth to conf Hirnant

Afon Tanat - conf Hirnant to conf Afon Rhaeadr

Afon Nadroedd - source to Lake Vyrnwy

Afon Tanat - source to conf Afon Eirth

R Wye - Hampton Bishop to conf Kerne Br
Mid, Large, Calcareous

R Wye - Bredwardine Br to Hampton Bishop

Cilieni - source to conf R Usk

Nant Bran - source to conf R Usk

Rhiangoll - source to conf R Usk

Grwyne Fawr - source to conf Grwyne-Fechan

R Usk - conf Afon Crai to conf Afon Senni

Afon Yscir - conf Yscir Fechan to conf R Usk

Burry Pill - headwaters to tidal limit

Clyne River - headwaters to tidal limit

Gwenffrwd - headwaters to confluence with Tywi

Bargod - headwaters to confluence with Teifi

Cych - headwaters to confluence with Teifi

Morgenau - headwaters to confluence with Teifi

Duar - headwaters to confluence with Teifi

Piliau - headwaters to confluence with Teifi

Unnamed - HW to TL, Teifi estuary, St Dogmaels S.

Cynllo - headwaters to confluence with Teifi

Unnamed - HW to TL, Teifi estuary, St Dogmaels N.

Ceri - headwaters to confluence with Teifi

Cywarch

Dyfi - above Afon Cywarch

Arthog

Mawddach estuary north

Dwynant

Mawddach - lower

Winterton Marsh - HW to TL, Nr Pickleridge Lagoon

Cresswell - headwaters to conf with Waddock Lake

Little Haven Stream - HW to TL, Little Haven

Rickeston Pill - headwaters to tidal limit

Swanswell Stream - HW to TL Broad Haven N., S. end

Haroldstone Stream - HW to TL, Broad Haven N. End

Druidstone Stream - HW to tidal limit, Druidstone

Nolton Stream - HW to tidal limit, Nolton Haven

Bathesland Water - HW to tidal limit, Newgale

Trefeiddan Moor - HW to tidal limit, Porthlysgi

Halen - headwaters to tidal limit

Nant y Grogal - headwaters to tidal limit

Gido - headwaters to tidal limit

Nant Cafngolau - headwaters to tidal limit

Gwili - headwaters to tidal limit

Loughor - conf with Marlais to conf with Aman

Loughor - headwaters to confluence with Marlais

Aman - conf with Garnant to conf with Loughor

Aman - headwaters to confluence with Garnant

Cerdin - headwaters to confluence with Teifi

Gronw - headwaters to confluence with Taf

Sawdde - conf with Clydach to confluence with Tywi

Nant Pwntan - headwaters to tidal limit

Nine Wells Stream - HW to tidal limit, Nine Wells

Dwr Cleifion - HW to tidal limit, Caer Bwdy Bay

Whitesands Stream N. - headwaters to tidal limit

Brandy Brook - headwaters to tidal limit

Pelcomb Brook - headwaters to conf with W. Cleddau

Camrose Brook - headwaters to conf with W. Cleddau

Rudbaxton Water - HW to conf with W. Cleddau

Stonehall Stream - HW to conf with W. Cleddau

Carew - HW to conf with Carew Tidal Mill Pond

Llanstadwell Stream - headwaters to tidal limit

Peris - headwaters to tidal limit

Cledlyn - headwaters to confluence with Teifi

Mwidan - headwaters to confluence with Teifi

Arberth - headwaters to confluence with Teifi

Dulas - headwaters to confluence with Teifi

Wen (Mawddach)

Eden - lower

Un-named to Dyfi estuary north

Clywedog (Wnion)

Wnion - lower

Cwm-Llechen

Wnion - upper

Cwm-Mynach

Ysgethin

R Wye - conf R Irfon to Brewardine Br

Letton Lake Bk - source to conf R Wye

R Edw - conf Camnant Bk to conf Clas Bk

Clas Bk - source to conf R Edw

R Wye (Avon Gwy) - conf R Ithon to conf R Irfon

Builth Dulas Bk - source to conf R Wye

Yscir Fechan - source to conf Afon Yscir

Gamlan

Mawddach - middle

Doethie - headwaters to conf with Pysgotwr Fawr

Camddwr - headwaters to Llyn Brianne reservoir

Tywi - headwaters to Llyn Brianne reservoir

Frainslake Stream - headwaters to tidal limit

Freahwater East Stream - headwaters to tidal limit

Unnamed - HW to TL, Teifi Est., S.side near Poppit

Hirwaun - headwaters to confluence with Teifi

Cledan - headwaters to tidal limit

Glaslyn - Nanmor to Colwyn

Hen

Nanmor

Desach

Colwyn

Glaslyn - upstream Colwyn

Llyfni

Carrog

Un-named to Foryd estuary east

Llifon

Clydach - headwaters to confluence with Sawdde

Dulas - conf with Sannan to confluence with Tywi

Tawelon - headwaters to tidal limit

Fenni - headwaters to confluence with Taf

Sawdde - headwaters to confluence with Clydach

Annell - headwaters to confluence with Tywi

Myddfi - headwaters to confluence with Tywi

Honddu - source to conf R Usk

Afon Yscir - source to conf Yscir Fechan

R Usk - conf Afon Senni to conf Afon Crawnon

Un-named near Soch catchment

Gwendraeth Fach - headwaters to tidal limit

Cywyn - conf with Nant Coedcae to tidal limit

Tywi - Bishop's Pond to conf with Gwili and TL
Mid, Large, Siliceous

Cresswell River - conf with Waddock Lake to TL

Huberston Pill - headwaters to tidal limit

Unnamed - HW to tidal limit, Sandy Haven Pill

Westfield Pilll - headwaters to tidal limit

Tawe - conf with Giedd to confluence with Twrch

Tawe -confluence with Twrch to tidal limit

Upper Clydach - headwaters to confluence with Tawe

Lower Clydach - headwaters to confluence with Tawe

Twrch - conf with Nant Gwys to conf with Tawe

Twrch - conf with Llynfell to confluence with Gwys

Garnant - headwaters to confluence with Aman

Tawe - conf with Nant Llech to conf with Giedd

Nant Llech - headwaters to confluence with Tawe

Llynfell - headwaters to confluence with Twrch

Unnamed trib - source to conf R Tern

Common Bk - source to conf R Perry

Clettwr - headwaters to confluence with Teifi

Grannell - headwaters to confluence with Teifi

Brefi - headwaters to confluence with Teifi

Artro - upper

Crawcwellt North

Mawddach - upper

Eden - upper

Gain

Aeron - headwaters to confluence with Gwili

Wyre - confluence with Wyre Fach to tidal limit

Wyre Fach - headwaters to confluence with Wyre

Wyre - headwaters to confluence with Wyre Fach

Carrog - headwaters to confluence with Wyre

Unnamed trib of Moreton Bk to Long Coppice

Moreton Bk - source to conf R Lugg

Curl Bk - source to conf R Arrow

Gilwern Bk - source to conf R Arrow

R Frome - source to conf Tedstone Bk

Tedstone Bk - source to conf R Frome

R Arrow - conf Gilwern Bk to conf R Lugg

Afon Gwesyn - source to conf R Irfon

R Usk conf Afon Crawnon to conf Gavenny R

R Usk - conf R Gavenny to conf Olway Bk

Broadway Reen - source to R Severn Estuary

Nant Dowlais - source to conf Ely R

Ely R - conf Nant Mychydd to conf Nant Clun

Nant Clun - source to conf Ely R

Nant Mychydd - source to conf Ely R

Ely R - source to conf Nant Mychydd

Marlais - headwaters to confluence with Loughor

Castlemartin Corse - headwaters to tidal limit

Quoits Pill - headwaters to tidal limit

Goldborough Pill East - headwaters to tidal limit

Goldborough Pill West - headwaters to tidal limit

Angle Stream South - headwaters to tidal limit

Pembroke - headwaters to tidal limit

Angle Stream North - headwaters to tidal limit

Green Hill Stream - headwaters to tidal limit

Martin's Haven Pill - headwaters to tidal limit

Clywedog - headwaters to confluence with Teifi

Creuddyn - headwaters to confluence with Teifi

Mynach - headwaters to confluence with Rheidol

Nant Peris

Caledffrwd

Seiont - lower

Gwyrfai

Bran - conf with Crychan to conf with Gwydderig

Crychan - headwaters to confluence with Bran

Bran - headwaters to confluence with Crychan

Marlais - conf with Pib to confluence with Cothi

Pib - headwaters to confluence with Marlais

Marlais - headwaters to confluence with Melinddwr

Marlais - conf with Melinddwr to conf with Cothi

Clydach - headwaters to confluence with Cothi

Dwyryd estuary south

Eisingrug

Un-named tributary Tremadog Bay

Tawe - headwater to confluence with Nant Llech

Loughor - confluence with Aman to tidal limit

Morlais - headwaters to tidal limit

Cloidach - headwaters to confluence with Cothi

Twrch - headwaters to confluence with Llynfell

Rotten Pill - headwaters to tidal limit

Gwendraeth Fawr - headwaters Afan Goch

Crychiau - headwaters to confluence with Gwili

Bosherston Lilly Ponds - Headwaters to tidal limit

Gorlech - headwaters to confluence with Cothi

Cothi - conf with Twrch to confluence with Marlais

Cartlett Brook - HW to conf with W. Cleddau

W. Cleddau - Anghof conf to Cartlett Brook conf

Spittal Brook - headwaters to conf with W. Cleddau

W. Cleddau - Stonehall Stream conf to Anghof conf

E. Cleddau - conf with Wern to conf with Syfynwy

Syfynwy - headwaters to conf with Deepford Brook

Nant y Fendrod - headwaters to conf with Tawe

Dulais - headwaters to tidal limit

Wernffrwd Stream - headwaters to tidal limit

Llan - headwaters to tidal limit

Dulais - headwaters to confluence with Loughor

Lliedi - headwaters to tidal limit

Lliw - headwaters to confluence with Llan

R Perry - conf Common Bk to conf Tetchill Bk

Unnamed trib - source to conf R Roden

Soulton Bk - source to conf unnamed trib

Tetchill Bk - source to conf R Perry

R Perry - source to conf Common Bk

R Roden - source to conf unnamed trib

Unnamed trib - source to conf Soulton Bk

Afon Rhaeadr - source to conf Afon Tanat

Mithil Bk - source to conf R Ithon

Hindwell Bk - source to conf Knobley Bk

Knobley Bk - source to conf Hindwell Bk

Cascob Bk - source to conf R Lugg

Saint

Un-named Cardigan Bay South

Nant Eiddon

Daron

Rhyd-Hir - lower

Sprinkle Pill - HW to TL, Cleddau Estuary, Hook

Red Water - HW to TL, Cleddau Est., Little Milford

Unnamed - HW to TL, Cleddau Est., Lower Freystrop

Merlin's Brook - headwaters to conf with h Cleddau

Unnamed - HW to TL, Cleddau Estuary, Uzmaston

Millin Brook - headwaters to tidal limit

Castell - headwaters to confluence with Rheidol

Melindwr - headwaters to confluence with Rheidol

Rheidol - confluence with Castell to tidal limit

Clarach - conf with Bow Street Brook to TL

Clarach - headwaters to conf with Bow Street Brook

Unnamed - headwaters to Sarn Gynfelyn

Bow Street Brook - headwaters to conf with Clarach

Hengwm - conf with Llechwedd-mawr to Rheidol conf

Llechwedd Mawr - HW to Nant y Moch reservoir
Mid, Small, Organic

Penrhos

Geirch

Ogwen - upper

Afon Cammarch - source to conf R Irfon

Afon Garth Dulas - source to conf R Irfon

Howey Bk - source to conf R Ithon

R Irfon - source to conf Afon Gwesyn

Humber Bk - source to conf Holly Bk

Hindwell Bk - conf Knobley Bk to conf R Lugg

Pinsley Bk - source to conf R Lugg

Cheaton Bk - source to conf R Lugg

Aman R - source to conf Afon Cynon

R Cynon - conf Aman R to conf R Taff

Unnamed trib - source to conf Rhymney R

Nant Glandulas - source to conf Rhymney R

Rhondda R - source to conf Afon Rhondda Fach

Nant y Aber - source to conf Rhymney R

Nant Cylla - source to conf Rhymney R

Rhymney R - Nant Bargod Rhymni to conf Nant Cylla

Crymlyn Brook - HW to conf with Tennant Canal

Gwys - headwaters to confluence with Twrch

Giedd - headwaters to confluence to Tawe

Ritec - headwaters to tidal limit

Cocheston Pill - headwaters to tidal limit

Mill Bay Stream - headwaters to tidal limit

Radford Pill - headwaters to tidal limit

Ford Pill - headwaters to tidal limit

Layers Pill - HW to tidal limit, Cleddau Estuary

Berwyn - headwaters to confluence with Groes

Brennig - headwaters to confluence with Teifi

Groes - headwaters to confluence with Teifi

Teifi - conf with Fflur to confluence with Camddwr

Camddwr - headwaters to confluence with Teifi

Teifi - headwaters to confluence with Meurig

Meurig - headwaters to confluence with Teifi

Fflur - headwaters to confluence with Teifi

Teifi - conf with Meurig to conf with Camddwr

Un-named tributary Dwyryd

Dwyryd - lower

Dwyryd - upper

Cothi - headwaters to confluence with Twrch

Melinddwr - headwaters to confluence with Marlais

Annell - headwaters to confluence with Cothi

Twrch - headwaters to confluence with Cothi

Gwili - headwaters to confluence with Alltwalis

Gwili - conf with Alltwalis to conf with Duad

Gochen - headwaters to confluence with Duad

Alun - headwaters to tidal limit, Porth Clais

Solva - headwaters to tidal limit

Cwmwdig Water - HW to tidal limit, nr Abereiddi

Unnamed - headwaters to tidal limit, Abereiddi

Unnamed - HW to tidal limit, Aberfelin, Trefin

Unnamed - headwaters to tidal limit, Porthgain

Unnamed - headwaters to tidal limit, Abercastle

Dyffryn-Gwyn

Leri - lower

Leri - upper

Leri - un-named tributary

Cone Bk - source to R Severn Estuary

Wern - headwaters to conf with Eastern Cleddau

Eastern Cleddau - headwaters to conf with Wern

Cwmnewydion - headwaters to conf with Ystwyth

Magwr - headwaters to confluence with Ystwyth

Llanfihangel - headwaters to conf with Ystwyth

Hengwm - headwaters to Nant y Moch reservoir

Paith - headwaters to confluence with Ystwyth

Ystwyth - conf with Cwmnewydion to tidal limit

Ystwyth - headwaters to conf with Cwmnewydion

Hesbin

Clwyd - upstream Hesbin

Melin-Dwr

Corris

Clywedog - Melindwr to Afon Corris

Clywedog - Afon Corris to Rhyd Galed

Dwr Ial

Nant Mawr

Clywedog - Nant Mawr to Melindwr

Clywedog - Clwyd to Nant Mawr

R Lugg - conf Cascob Bk to conf Norton Bk

R Lugg - conf Bleddfa Bk to conf Cascob Bk

Ridgemoor Bk - source to conf R Lugg

Afon Rhondda Fach - source to conf Rhondda R

Whitchurch Bk - source to conf R Taff

Rhondda R - conf Afon Rhondda Fach to conf R Taff

R Taff - conf R Cynon to conf Rhondda R

Nant Clydach - source to conf R Taff

Ely R - conf Nant Clun to Allot Gardens, Ely

R E Onny - source to confuence R Onny

R Severn - conf Bele Bk to conf Sundorne Bk
Low, Large, Siliceous

Afon Iwrch - source to conf Afon Tanat

Afon Cynllaith - source to conf Afon Tanat

R Morda - source to conf unnamed trib

R Tern - conf Bailey Bk to conf R Meese

Minwear Brook - HW to tidal limit, Cleddau Estuary

Penglyn Brook - HW to tidal limit, Cleddau Estuary

Unnamed - HW to TL, Cleddau Est. US Blackpool Mill

Unnamed - HW to TL, Cleddau Estuary, Slebech Park

Narbeth Brook - headwaters to conf with E. Cleddau

Eastern Cleddau - conf with Syfynwy to tidal limit

Longford Brook - HW to conf with E. Cleddau

Deepford Brook - headwaters to conf with Syfynwy

Syfynwy - Deepford Brook conf to E. Cleddau conf

Teifi - conf with Nant Wern-Macwydd to tidal limit

Un-named tributary Dwyryd estuary

Erch - lower

Rhyd-Hir

Dwyfawr - lower

Rhymney R - source to conf Nant Bargod Rhymni

Taff Bargoed

Nant Morlais - source to conf R Taff

Taf Fechan - source to conf Afon Taf Fawr

Afon Taf Fawr - source to conf Taf Fechan

Usk u/s Brecon

Marcross Brook - headwaters to tidal limit

R Roden - conf Sleap Bk to conf R Tern

Soulton Bk - conf unnamed trib to conf R Roden

Nant Rhyd-ros lan - source to conf R Severn

Afon Trannon - source to nr Argoed

Afon Carno - conf Afon Cwm-llwyd to conf R Severn

R Trothy - conf Llanymynach Bk to conf Llymon Bk

Llymon Bk - source to conf R Trothy

R Trothy - source to conf Llanymynech Bk

Valley Bk - source to conf R Wye

R Trothy - conf Llymon Bk to conf R Wye

R Wye - conf to conf Afon Marteg to conf Afon Elan

Ffrwd Wyllt - headwaters to tidal limit

Afan - confluence with Pelenna to tidal limit

Afan - headwaters to confluence with Corrwg

Cound Bk - source to conf unnamed trib

Unnamed trib - source to conf Cound Bk

Unnamed trib - source to conf R Camlad

R Severn - conf Afon Dulas to conf R Camlad

Llifior Bk - source to conf R Severn

Afon Carno - source to conf Afon Cwm-llwyd

R Monnow - conf Afon Honddu to conf R Wye

Rudhall Bk - source to conf R Wye

Stretford Bk - source to conf Tippets Bk

R Arrow - source to conf Gladestry Bk

Gladestry Bk - source to conf R Arrow

Honeylake Bk - source to conf Little Arrow

R Arrow - conf Gladestry Bk to conf Gilwern Bk

R Ithon - conf Camddwr Bk to conf R Wye

Garren Bk - conf Gamber Bk to conf R Wye

Walford Bk - source to conf R Wye

Garren Bk - source to conf Gamber Bk

R Ithon - source to conf Llaethdy Bk

Afon Chwefru - source to conf R Irfon

R Edw - source to conf Colwyn Bk

Rhiwnant - source to conf Afon Claerwen

R Wye - conf Afon Elan to conf R Ithon

Afon Elan - Caban-coch Rsvr to conf R Wye

R Claerwen - conf Rhiwnant to Dolymynach Rsvr

Afon Claerwen - conf Afon Arban to conf Rhiwnant

Afon Arban - source to conf Afon Claerwen

Llys Weirydd - headwaters to tidal limit

Nash Brook - headwaters to tidal limit

Thaw - confluence with Kenson to tidal limit

Barry Brook - headwaters to tidal limit

Kenson - conf with Waycock to conf with Thaw

Thaw/Cadoxton

COLHUW

Kenfig - Nant Cwm Philip conf to Margam Moors conf

Nant Cwm Philip - headwaters to conf with Kenfig

Nant Cwm-mawr - headwaters to tidal limit

Kenfig - headwaters to conf with Nant Cwm Philip

Margam Moors - headwaters to conf with Kenfig

Nant y Dunol - headwaters to tidal limit

Ewenny - confluence with Alun to tidal limit

Ewenny - conf with Ewenny Fach to conf with Alun

Bechan Bk - source to conf Highgate Bk

Afon Rhiw (S arm) - Ty-newydd to Dwyrhiew

Afon Cwm-llwyd - source to conf Afon Carno

R Camlad - conf Caebitra Bk to conf R Severn

Afon Claerwen - source to conf Afon Arban

Afon Elan - source to Pont ar Elan

Afan - conf with Corrwg to confluence with Pelenna

Pelenna - headwaters to confluence with Afan

Corrwg - headwaters to confluence with Afan

Tippets Bk - source to conf Stretford Bk

Stretford Bk - conf Tippets Bk to conf R Arrow

Tarrington Bk - source to conf R Frome

R Lodon - source to conf R Frome

Pentaloe Bk - source to conf R Wye

Cledan - source to conf R Irfon

Tirabad Dulas - source to conf R Irfon

R Irfon - conf Cledan to conf Tirabad Dulas

Withington Marsh Bk - source to conf R Little Lugg

Afon Marteg - source to conf R Wye

R Wye - conf Afon Bidno to conf Afon Marteg

R Wye - conf Afon Tarenig to conf Afon Bidno

Afon Bidno - source to conf R Wye

Afon Tarenig - source to conf R Wye

R Wye - source to conf Afon Tarenig

Camnant Brook - source to confluence R Edw

Alun - headwaters to confluence with Ewenny

Ogmore - conf with Garw to confluence with Llynfi

Ewenny Fach - headwaters to confluence with Ewenny

Afon Rhiw (conf N and S arm) to conf R Severn

Aylesford Bk - source to conf R Camlad

Rea Bk - source to conf Rowley Bk

R Little Lugg - near Wyatt Fm to conf R Lugg

R Little Lugg - source to near Wyatt Fm

Bodenham Bk - source to conf R Lugg

Wellington Bk - source to conf R Lugg

R Irfon - conf Afon Gwesyn to conf Cledan

Humber Bk - conf Holly Bk to conf R Legg

R Frome - conf Tedstone Bk to conf R Lugg

Rhosog Fach Reen - source to Seven Estuary

Unnamed trib - source to conf Ebbw R

Dowlais Bk - source to conf Afon Lwyd

Monks Ditch - Wainbridge to mouth

Rowley Bk - source to conf Rea Bk

Afon Gam - source to conf Cledan

Rea Bk - conf Minsterley Bk to conf Pontesford Bk

Afon Gam - conf Cledan to conf Afon Banwy

Nant Rhyd-y-Moch - source to conf Guilsfield Bk

Yr Hafesb - source to conf Afon Banwy

Rea Bk - conf Pontesford Bk to conf R Severn

Wbury Bk - source to conf Rea Bk

Afon Banwy - conf Afon Twrch to conf Afon Gam

Worm Bk - source to conf R Monnow

R Monnow - source to conf Escley Bk

Escley Bk - source to conf R Monnow

R Dore - source to conf Worm Bk

Gamber Bk - source to conf Garren Bk

Wriggle Bk - source to conf R Wye

Ebbw R - conf Ebbw Fach R to Maes-glas

Pill Bk - source to conf Olway Bk

Olway Bk - conf Nant y Wilcae to conf Pill Bk

Olway Bk - conf Pill Bk to conf R Usk

Pantyreos Bk - source to Barrack Hill

Great-Spytty Reen - source to conf R Usk

W PIll Reen - source to R Severn Estuary

Ogmore - confluence with Llynfi to tidal limit

Ewenny - headwaters to conf with the Ewenny Fach

Ogmore - Ogwr Fach and Ogwr Fawr conf to Garw conf

Ogwr Fach - headwaters to confluence with Ogmore

Garw - headwaters to confluence with Ogmore

Afon Rhiw (N Arm) - Llyn y Bugail to Dwyrhiew

Minsterley Bk - source to conf Rea Bk

Pontesford Bk - source to conf Rea Bk

Cledan - source to conf Afon Gam

Rea Bk - conf Rowley Bk to conf Minsterley Bk

Unnamed trib - source to conf Afon Banwy

Lledan Bk - source to conf R Severn

R Lugg - conf R Arrow to conf R Wye

Afon Llynfi - source to conf Dulas Bk

Berthin Bk - source to conf R Usk

Llwynau Bk - source to conf R Usk

Llancarfan

Cadoxton - headwaters to tidal limit

Thaw - headwaters to confluence with Kenson

Kenfig - conf with Margam Moors to tidal limit

Sychryd - headwaters to confluence with Mellte

Mellte - conf with Sychryd to conf with R. Neath

Nedd Fechan - Pyrddin conf to River Neath conf

Mellte - conf with Hepste to confluence to Sychryd

Dulais - headwaters to confluence with River Neath

Pwll Trewern - source to conf R Severn

Guilsfield Bk - source to conf Nant Rhyd-y-Moch

Afon Banwy - source to conf Afon Twrch

Bele Bk - source to conf R Severn

R Severn - conf R Camlad to conf Bele Bk

Afon Vyrnwy - conf Afon Cownwy to conf Afon Banwy

Holly Bk - source to conf Humber Bk

Dulas Bk - source to conf R Dore

Olchon Bk - source to conf R Monnow

Afon Honddu - source to conf R Monnow

Monks Ditch - source to Wainbridge

Mill Reen - source to R Severn Estuary

Afon Lwyd - conf Dowlais Bk to Pont Sadwrn

Nedern Bk - souce to R Severn Estuary

Sor Bk - source to Sor Bk Br

R Usk - conf Olway Bk to New Br

Llynfi - headwaters to Lletty Brongu STW

Llynfi - Lletty Brongu STW to conf with Ogmore

Ogwr Fawr - headwaters to confluence with Ogmore

Baglan Brook - headwaters to conf with River Neath

Crythan Brook - headwaters to conf with Neath

Nant Cae'r-bryn - headwaters to conf with Neath

Clydach Brook - HW to conf with River Neath

Clydach - headwaters to conf with River Neath

Waycock - headwaters to confluence with Kenson

R Trym - source to conf R Avon (Brist)

Stoke Bk - source to conf Bradley Bk

R Ennig - source to conf Afon Llynfi

Dulas Bk - source to conf Afon Llynfi

Norton Bk - source to conf R Wye

How Caple Bk - source to conf R Wye

Afon Llynfi - conf Dulas Bk to conf R Wye

Cage Bk - source to conf R Wye

Unnamed trib - source to conf R Wye

Digedi Bk - source to conf R Wye

Ebbw Fach R - source to conf Ebbw R

Sirhowy R - source to Rock Villas

Sirhowy R - Rock Villas to conf Afon Ebwy

Ebbw R - source to conf Ebbw Fach R

Afon Lwyd - source to conf Dowlais Bk

Olway Bk - source to conf Nant y Wilcae

Bradley Bk - source to conf Stoke Bk

R Frome - Slad Bk to R Severn
Not Typed

Afon Clywedog - Clywedog Dam to R Severn

Caebitra Bk - source to conf R Camlad

Sturch Pill - source to conf R Severn Estuary

R Severn - source to conf Afon Dulas

Afon Lwyd - source to conf Llyn Clywedog

Afon Cerist - conf Afon Trannon to conf R Severn

The Mule - source to conf R Severn

R Clun - conf Folly Bk to conf R Unk

R Clun - conf R Unk to conf R Teme

Little Avon - conf Tortworth Bk to mouth

Redwick Common Rhine - source to conf The Pill

The Pill - source to conf Redwick Common Rhine

Bisham Rhine - source to conf RIver Severn Estuary

Oldbury Naite Rhine source to conf Severn Estuary

Hill Pill

Unnamed trib - source to R Severn Estuary

R Clun - source to conf Folly Bk

Folly Bk - source to conf R Clun

R Unk - source to conf R Clun

R Redlake - source to conf R Clun

R Corve - conf Seifton Bk to conf R Teme

R Kemp - source to conf R Clun

Worldsend Rhyne

Huntley-Tibberton Bk - source to conf Red Bk

Red Bk conf HuntleyTibberton Bk to conf R Leadon

Red Bk - source to conf Huntley-Tibberton Bk

R Leadon - Glynch Bk to conf R Severn (W Channel)

Ell Bk - source to conf R Leadon

Grimley Bk - source to conf R Severn

Warth Bk - source to R Severn Estuary

Lanes Bk - source to R Severn Estuary

Cinderford Bk conf Blackpool Bk to Severn Estuary

Epney Rhyne - source to conf R Severn Estuary

Blackpool Bk - source to conf Cinderford Bk

Cannop Bk - source to R Severn Estuary

Unnamed drain of Wbury Bk, Elton

Afon Clwedog - source to conf Afon Lwyd

Bechan Bk - conf Highgate Bk to conf R Severn

Unnamed trib - source to conf R Severn

R Camlad - source to conf Caebitra Bk

Highgate Bk - source to conf Bechan Bk

Shrawley Bk - source to conf R Severn

Dick Bk - source to conf R Severn

R Onny - source to conf R E Onny

Wbury Bk - source to mouth

Wylcwm Bk - source to conf R Teme

Ffrwdwen Bk - source to conf R Teme

R Teme - source to conf Ffwdwen Bk to conf R Clun

Broadmeadow Bank Ditch - source to Severn Estuary

Cinderford Bk - source to conf Blackpool Bk

Long Bk - source to R Severn Estuary

Ley Bk - source to R Severn Estuary

Deuddwr Bk - source to conf R Teme

R Teme - conf Deuddwr Bk to conf Ffrwdwen Bk

R Teme - source to conf Deuddwr Bk

R Onny - conf R E Onny to conf R Teme

Mill Bk - source to conf R Rea

R Rea - conf Farlow Bk to conf R Teme

Preston Bk - source to conf Kempley Bk

Ludstock Bk - source to conf Preston Bk

Glynch Bk - source to conf R Leadon

R Leadon - source to conf Preston Bk

Kempley Bk - source to conf R Leadon

Preston Bk - conf Kempley Bk to conf R Leadon

R Leadon - conf Preston Bk to conf Glynch Bk

Quinny Bk - source to conf Byne Bk

Criftin Bk - source to conf R Onny

Laughern Bk - source to conf R Teme

Sapey Bk - source to conf R Teme

R Teme - conf R Clun to conf R Onny

R Teme - conf R Onny to conf R Severn
Low, Large, Calcareous

Leigh-Cradley Bk - source to conf unnamed trib

Leigh-Cradley Bk conf unnamed trib to conf R Teme

Unnamed trib - source to conf Leigh-Cradley Bk

Careys Bk - source to conf R Severn

Kyre Bk - source to conf R Teme

Brimfield Bk - source to conf R Teme

Wigmore Drain - source to conf unnamed trib

Unnamed trib - source to conf Wigmore Drain

Ledwyche Bk - conf Dogditch Bk to conf R Teme

Afon Cerist - source to conf Afon Trannon

Mochdre Bk - source to conf R Severn

Afon Dulas - source to conf R Severn

Nant Feinion - source to conf R Severn

Gwydderig - headwaters to confluence with Bran