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Area of Outstanding Natural Beauty

High Weald

Polluted by sewage 3,515 times in 2025 - lasting 24,521 hours - That's 2.84 years!

Monitoring fell below 50% in some locations so could be more

Marker shade

Totals for High Weald in 2025

127 Sites polluted by Southern Water Thames Water

3,515 sewage dumps

24,521 hours duration

That's 2.84 years. On average 9.6 times a day

How does High Weald compare?

High Weald was the #1 most polluted Area of Outstanding Natural Beauty in England & Wales, by duration of sewage overflows, as reported by the water companies

Why the change?

Storm overflows spill when it rains, and 2025 was drier than 2024 - 90% of average annual rainfall against 105%.

So much of any drop is weather, not fixed pipes. The live page shows rainfall and sewage side by side, day by day.

Live Data

Take Action

Sewage pollution map of High Weald, showing 3,515 overflows in 2025

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Constituencies

Pollution Summary 2025

Here are all the reported sewage overflow totals for High Weald in 2025.

How we count, and how accurate it is

A CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway counts towards High Weald when it sits inside the designated area, or within 200 metres of its boundary. An overflow close to two AONBs is counted in both.

We use data from the water companies, but we are seeing many anomalies that make us believe that location information is quite poor. The situation is likely far worse than reported here.

Other CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s just outside the 200 metre boundary are not counted, though they may still affect water quality inside the area.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Southern Water	Shovelstrode Stream	HAMMERWOOD ROAD ASHURST WOOD WPS	104	2,282	99.4
Southern Water	River Dudwell	BURWASH COMMON STW	99	1,301	94.7
Southern Water	River Arun	MANNINGS HEATH WWTW	76	1,251	100
Southern Water	Hexden Channel	HAWKHURST NORTH WWTW	76	1,130	97.4
Southern Water	River Brede	WESTFIELD WWTW	64	843	94.7
Southern Water	River Rother	IDEN WWTW	61	840	99.9
Southern Water	Tide Brook	WASHWELL LANE WWTW	60	677	100
Southern Water	River Ouse	DANEHILL S.T.W.	49	636	99.8
Southern Water	River Grom	TUNBRIDGE WELLS SOUTH WWTW	52	536	100
Southern Water	Hexden Channel	SANDHURST WWTW	50	523	97.6
Southern Water	Kent Water	COWDEN WWTW, COWDEN, TUNBRIDGE WELL	47	506	100
Southern Water	Eridge Stream	REDGATE MILL CROWBOROUGH WWTW	44	491	99.9
Southern Water	Coombe Brook	WEST HOATHLY S.T.W.	44	483	100
Southern Water	Goddens Gill	QUICKBOURNE LANE NORTHIAM WWTW	47	458	100
Southern Water	River Medway	HARTFIELD ROAD CSO	56	438	100
Southern Water	River Ouse	BALCOMBE WASTEWATER TREATMENT WORKS	33	416	100
Southern Water	Tickerage Stream	BLACKBOYS WWTW	48	397	99.2
Southern Water	River Brede	BATTLE WWTW	49	387	100
Southern Water	River Medway	PENSHURST WWTW	61	350	99.9
Southern Water	Crane Brook	CRANBROOK WWTW	43	346	100
Southern Water	Pippingford Brook	ST. JOHN'S, CROWBOROUGH WWTW	38	316	100
Southern Water	River Medway	HARTFIELD WWTW	30	312	100
Southern Water	Freshwater River	NO1 CSO STATION RD ROBERTSBRIDGE	71	304	100
Southern Water	Abbey Petty Sewer	ROBERTSBRIDGE WWTW	30	292	99.9
Southern Water	River Ouse	SCAYNES HILL WWTW	32	291	100
Southern Water	River Teise	FRANT S.T.W.	45	264	99.7
Southern Water	Hawkhurst South Stream	HAWKHURST SOUTH WWTW	41	258	100
Southern Water	Bewl Water	TINKERS LANE PS, TICEHURST	38	255	100
Southern Water	River Line	CANADIA CSO	40	253	99.8
Southern Water	River Brede	STUBBS LANE BREDE WWTW	29	250	99
Southern Water	Freshwater River	CHEQUERS PUMPING STATION	34	244	99.8
Southern Water	River Rother	MILL CORNER NORTHIAM WWTW	40	242	99.9
Southern Water	River Medway	FOREST ROW WWTW	20	232	97.1
Southern Water	Newmill Channel	TENTERDEN WWTW	27	217	99.9
Southern Water	River Grom	GROOMBRIDGE WWPS	21	199	100
Southern Water	River Medway	FIVE OAK GREEN ROAD TUDELEY CEO	36	190	99.6
Southern Water	River Rother	WITTERSHAM WWTW	34	187	99.9
Southern Water	Eridge Stream	TOWN ROW ROTHERFIELD NO 1 CSO	32	176	100
Southern Water	River Medway	WITHYPITTS TURNERS HILL CEO	29	176	99.4
Southern Water	Knelle Petty Sewer	BECKLEY WWTW	22	174	99.3
Southern Water	Newmill Channel	BENENDEN WWTW	21	167	99.9
Southern Water	River Grom	TUNBRIDGE WELLS SOUTH WWTW	50	167	100
Southern Water	Freshwater River	SEWER MAYNARDS GATE PUMPING STN	32	162	56.4
Southern Water	Freshwater River	HUGGETTS FARM PUMPING STATION	31	157	99.5
Southern Water	Pannel Sewer	GUESTLING GREEN WWTW	54	152	99.9
Southern Water	Controlled Waters	LITTLEBROOK WALDRON CEO	31	151	100
Southern Water	Freshwater River	TILSMORE P.S., HEATHFIELD	27	148	99.7
Southern Water	River Tillingham	STAPLECROSS WWTW, GATE FARM, STAPLE	20	130	100
Southern Water	Coggins Mill Stream	CROUCH FARM MAYFIELD WWTW	23	126	99.8
Southern Water	Herons Ghyll	OCKLYE CROWBOROUGH CSO	28	126	100
Southern Water	Barden Mill Stream	BIDBOROUGH WWTW	17	125	99.9
Southern Water	River Ouse	STAPLEFIELD WWTW	19	124	100
Southern Water	River Pevensey	CATSFIELD WWTW	33	122	96.5
Southern Water	River Rother	MERES FARM MAYFIELD WWTW	30	122	100
Southern Water	Lywood Stream	ARDINGLY WWTW	17	122	98.1
Southern Water	River Teise	FURNACE POND CEO	15	117	100
Southern Water	Newmill Channel	TENTERDEN WWTW	37	116	99.9
Southern Water	Pippingford Brook	NUTLEY WWTW	18	110	100
Southern Water	River Rother	PEASMARSH WPS	23	110	99.3
Southern Water	Marsham Sewer	FAIRLIGHT WWTW	19	104	99.5
Southern Water	Hexden Channel	ROLVENDEN LAYNE WWTW	10	102	97.7
Southern Water	Freshwater River	CSO PELLINGS WOOD	29	100	100
Southern Water	River Medway	FORDCOMBE WASTEWATER TREATMENT WRKS	21	98	97.7
Thames Water	Gatwick Stream	Pease Pottage	12	98	91.7
Southern Water	Hawkhurst South Stream	COCKSHOT FARM CSO, HAWKHURST, KENT	23	95	100
Southern Water	River Brede	FERRY HILL WINCHELSEA WWTW	12	95	100
Southern Water	Freshwater River	EWHURST LANE PUMPING STATION	17	92	100
Southern Water	Crane Brook	CRANBROOK WWTW	40	92	100
Southern Water	River Medway	SOUTHBOROUGH CEMETERY TUNBRIDGE	37	88	96.3
Southern Water	River Teise	UNDERHILL GOUDHURST WWTW	13	85	97.6
Southern Water	Freshwater River	CROWHURST CEO	37	85	99.9
Southern Water	River Rother	STONE GREEN STONE IN OXNEY WWTW	71	83	100
Southern Water	Freshwater River	BEST BEECH HILL CEO	15	80	100
Southern Water	Royal Military Canal	ICKLESHAM WWTW	14	79	99.4
Southern Water	Cockhaise Brook	HORSTED KEYNES WWTW	11	78	99.9
Southern Water	River Teise	WHITEGATES LANE WADHURST WWTW	22	70	99
Southern Water	Eridge Stream	TOWN ROW ROTHERFIELD NO 2 CSO	19	70	88.7
Southern Water	River Tillingham	WISH STREET RYE CEO	77	66	100
Southern Water	River Teise	BROADFORD CEO	10	57	100
Southern Water	Freshwater River	NURSERY LANE PUMPING STATION	23	56	100
Southern Water	River Teise	JONAS LANE WADHURST CEO	16	55	100
Southern Water	Sunnyside Stream	LUXFORD LN-EAST GRINSTEAD WWTW	15	55	99.8
Southern Water	River Ouse	BALCOMBE WASTEWATER TREATMENT WORKS	7	54	94.5
Southern Water	Freshwater River	GIBBETTS MARSH PS	22	54	100
Southern Water	Shortbridge Stream	FAIRWARP PUMPING STATION	10	53	99.8
Southern Water	Robertsbridge Petty Sewer	NORTHBRIDGE ST ROBERTSBRIDGE CSO	14	52	99.6
Southern Water	Nunningham Stream	GARDNER STREET SEWAGE WORKS	8	50	99.9
Southern Water	Freshwater River	HORSMONDEN ROAD PUMPING STATION	12	50	99.9
Southern Water	Hexden Channel	CASTLE TERRACE CSO (HAWKHURST)	14	39	100
Southern Water	Chalybeate Spring	KILNDOWN S.T.W.	9	38	99.9
Southern Water	River Medway	CSO AT STATION ROAD - FOREST ROW	14	38	48.6
Southern Water	River Rother	HURST GREEN WWTW	6	37	99.6
Southern Water	Barden Mill Stream	HOLDEN CORNER TUNBRIDGE WELLS CSO	37	37	100
Southern Water	Warbleton Stream	PUNNETTS TOWN WPS	12	35	100
Southern Water	River Rother	BURWASH VILLAGE WWTW	8	35	100
Southern Water	Freshwater River	RYE ROAD	4	33	100
Southern Water	Cockhaise Brook	WEST HOATHLY CEO	10	28	99.4
Southern Water	Barden Stream	WATERFRETS LANGTON GREEN CSO	19	27	99.9
Southern Water	Balcombe Lake	ST JAMES COTTAGE BALCOMBE CSO	240	25	88.4
Southern Water	River Rother	STREET END LANE BROAD OAK CEO	13	21	96.9
Southern Water	Forge Stream	EBDENS HILL HASTINGS CEO	13	21	99.9
Southern Water	Freshwater River	BRIDGEWAYS	6	20	99.7
Southern Water	River Brede	WESTFIELD WWTW	11	19	94.7
Southern Water	River Tillingham	WINCHELSEA ROAD RYE B CEO	7	18	100
Southern Water	Unnamed Powdermill Stream	ASTEN FIELDS PUMPING STATION	7	17	97.3
Southern Water	River Rother	BRICKWALL SEWAGE PUMPING STATION	4	14	100
Southern Water	Nunningham Stream	WINDMILL HILL HERSTMONCEUX WWTW	3	14	100
Southern Water	Freshwater River	COUSLEY WOOD CEO	7	12	100
Southern Water	Clippingham Stream	RUSHLAKE GREEN WWTW	1	9	100
Southern Water	Marsham Sewer	WAITES LANE CSO	10	8	99.9
Southern Water	Marsham Sewer	LOWER WAITES LANE FAIRLIGHT CSO	10	7	100
Southern Water	Lywood Stream River Ouse	ARDINGLY WWTW, ARDINGLY	3	5	98.1
Southern Water	English Channel	ROCK-A-NORE CEO	2	5	100
Southern Water	Shovelstrode Stream	GLEAVE CLOSE EAST GRINSTEAD CEO	1	4	100
Southern Water	Freshwater River	ROCK LANE PUMPING STATION	4	4	100
Southern Water	Tudely Brook	PEMBURY WWTW	1	3	100
Southern Water	Jarvis Brook	ALDERBROOK WAY CSO	3	2	100
Southern Water	River Ouze	SCHOOL LANE DANEHILL CSO	2	2	59.3
Southern Water	River Limden	ST MARYS LANE TICEHURST CSO	3	2	60.9
Southern Water	River Teise	SMITHS LANE(GOUDHURST)WWTW, SMITHS	3	2	100
Southern Water	Barden Mill Stream	LANGHOLM ROAD LANGTON GREEN CSO	4	2	99.6
Southern Water	Freshwater River	THREE CUPS SEWAGE P.S.	1	2	99.4
Southern Water	Freshwater River	PETT (GLEBE COTTAGES) WWPS	1	2	99.9
Southern Water	Sailors Stream	MILL LANE HASTINGS CSO	2	2	56.5
Southern Water	Jarvis Brook	ALDERBROOK WAY CSO	3	1	100
Southern Water	Unnamed Drain To River Medway	PENNINGTON ROAD CEO	2	1	100
Southern Water	Reading Sewer	READING STREET W.W.T.W	1	0	99.9

Data Sources & Accuracy

EDM (Event Duration Monitoring) data and Consented Discharges to Controlled Waters with Conditions from Environment Agency & Data Map Wales, and Scottish Water

Experimental derived data from Thames Water API, Some data may be missing or inaccurate. Live sewage data from Stream Water API

Annual figures up to and including 2025 come from official water company returns. The 2026 figure is our own estimate, derived continuously from the companies' live data feeds.

Uses Environment Agency rainfall data from the real-time data API (Beta) - Rainfall data is delayed by up to two days.

This website is intended to provide an accurate representation of the Environment Agency data. The data is hard to use, and thus some errors may have been made. If you find something that is incorrect, please raise an issue at the GitHub issues page and we'll endeavour to fix it quickly.

This project is not associated, approved or endorsed by any of the companies whose logos you see here.

Analysing sewage pollution by the Water Industry

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