Area of Outstanding Natural Beauty

North Devon

Polluted by sewage 588 times in 2025 - lasting 5,763 hours

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Contains OS Data © Crown copyright & database right 2021-2024
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Totals for North Devon in 2025

11 Sites polluted by South West Water
588 sewage dumps
5,763 hours duration
Sewage pollution map of North Devon
Sewage pollution map of North Devon, showing 588 overflows in 2025
That's 8 months. On average 1.6 times a day

How does North Devon compare?

North Devon was the #14 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.

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Pollution Summary 2025

Here are all the reported sewage overflow totals for North Devon 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 North Devon 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 %
South West Water River Yeo HORNS CROSS SEWAGE TREATMENT WORKS 230 2,035 100
South West Water Abbey River HARTLAND WASTEWATER TREATMENT WORKS 93 1,101 97.9
South West Water Bristol Channel WOOLACOMBE PSCSO/EO 49 873 100
South West Water Stream To Mouthmill Beach HIGHER CLOVELLY WWTW 59 768 100
South West Water Clovelly Bay SOUTHERN PUMPING STATION 54 709 100
South West Water River Abby HARTLAND PSCSO/EO 31 82 100
South West Water Hele Bay - Bristol Channel IL'CMBE RESEWERAGE- HELE BEACH TANK 28 73 100
South West Water Ilfracombe Harbour LARKSTONE LANE STORM TANK CSO 29 70 100
South West Water Croyde Bay CROYDE WASTEWATER TREATMENT WORKS 9 45 100
South West Water Pill COMBINED SEWER OVERFLOW AT SKERN 2 1 100
South West Water Unnamed Stream BERRYNARBOR PS CSO 4 1 98.7

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.