Yorkshire Water

was responsible for 54,158 sewage overflows in 2022
On average 148.4 times a day

These lasted for 231,873 hours (That's 26.84 years!) - in 1,757 different locations across their service area

Worst Locations Yorkshire Water

1. EASTWOOD WWTW

Calder Valley polluted for 2,912 hours, into River Calder

167 incidents

That's 4.04 months.

3.2 times a week, on average

2. COLBURN SEWAGE TREATMENT WORKS

Richmond (Yorks) polluted for 2,242 hours, into River Swale

174 incidents

That's 3.11 months.

3.3 times a week, on average

3. HUDDERSFIELD STW

Huddersfield polluted for 2,210 hours, into River Calder

287 incidents

That's 3.07 months.

5.5 times a week, on average

4. BONEGATE LN, ALEGER ST & THORNHILL

Calder Valley polluted for 2,121 hours, into River Calder

338 incidents

That's 2.95 months.

6.5 times a week, on average

5. DANESMOOR WWTW

North East Derbyshire polluted for 1,946 hours, into River Rother

166 incidents

That's 2.7 months.

3.2 times a week, on average

6. LANGTHORNE STW

Richmond (Yorks) polluted for 1,858 hours, into Cobshaw Dyke

146 incidents

That's 2.58 months.

2.8 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.