South West Water

was responsible for 37,587 sewage overflows in 2022
On average 103 times a day

These lasted for 289,507 hours (That's 33.51 years!) - in 1,009 different locations across their service area

Worst Locations South West Water

1. STOKE HILL WWTW

Torridge and West Devon polluted for 4,665 hours, into Milton Stream

241 incidents

That's 6.48 months.

4.6 times a week, on average

2. HARBERTON WWTW

Totnes polluted for 4,019 hours, into Harbeton Stream

260 incidents

That's 5.58 months.

5 times a week, on average

3. BEALS MILL NO 2 CSO

North Cornwall polluted for 3,937 hours, into River Inny

293 incidents

That's 5.47 months.

5.6 times a week, on average

4. GRATTON WASTEWATER TREATMENT WORKS

Torridge and West Devon polluted for 3,522 hours, into River Meavy

173 incidents

That's 4.89 months.

3.3 times a week, on average

5. MORETONHAMPSTEAD WWTW

Central Devon polluted for 3,191 hours, into Wray Brook

208 incidents

That's 4.43 months.

4 times a week, on average

6. HOLSWORTHY (DERRITON) STW

Torridge and West Devon polluted for 2,858 hours, into Coles Stream

182 incidents

That's 3.97 months.

3.5 times a week, on average

Water Companies

Data Sources & Accuracy

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

Experimental derived data from Thames Water API, Some data may be missing or inaccurate. This 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.