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Yorkshire Water storm overflows

2,171 storm overflows · 2,097 with a live status feed · regulated by the Environment Agency.

Discharging now
0
of 2,076 overflows reporting live
Spills in 2025
51,276
official, from 2,161 monitored overflows
Hours in 2025
285k
total discharge time, 132 h per overflow
Average per overflow
23.7
spills each in 2025 · -24% on 2024 (31.4)

Discharging now

None reported discharging in the latest feed update. "Not discharging" means the monitors report no discharge — not that the water is clean.

Year by year

Spills reported across all of Yorkshire Water's monitored overflows.

20211,843 sites
60,982 spills · 351k h
20221,876 sites
47,528 spills · 197k h
20232,145 sites
77,393 spills · 515k h
20242,171 sites
68,164 spills · 430k h
20252,161 sites
51,276 spills · 285k h

More overflows were monitored each year (1,843 in 2021, 2,161 in 2025), so part of any rise is more monitors, not only more spilling.

Official Environment Agency Event Duration Monitoring returns, 12/24-hour counting method (the first 12 hours of a discharge count as one spill, each further 24 hours as one more). Earlier years are matched to today's overflows by name and location, because the EA's site IDs changed between returns; a site that could not be matched is left out of that year rather than guessed.

Most spills in 2025

The overflows that spilled most often. A red tag means discharging right now.

1
Melton STW River Humber
2451,219 h
2
Marske Sewage Treatment Works Marske Beck
1702,046 h
3
Eastwood WwTW River Calder
1292,182 h
4
Princess Bridge No 2 CSO River Calder
1281,650 h
5
Ben Rhydding (Ilkley) Wpc Works, St River Wharfe
1271,759 h
6
Beamsley Wastewater Treatment Works River Wharfe
120118 h
7
Bonegate Lane CSO River Calder
120737 h
8
Bonegate Lane CSO River Calder
119463 h
9
Leyburn Wpc Works River Ure
1171,771 h
10
Thistle Street CSO River Colne
1171,122 h
11
Hull WwTW River Humber
1161,560 h
12
Hebble Lane CSO Hebble Brook
1161,170 h
13
Felixkirk Sewage Treatment Works Unnamed Trib Of Whitelass Beck
1141,401 h
14
Marton Le Moor STW Trib Of Cundall Beck
114276 h
15
Wistow Sewage Treatment Works River Ouse
1131,879 h
16
Harome Sewage Treatment Works Harome Moor Drain
1131,919 h
17
High Royd Sewage Treatment Works River Calder
113417 h
18
Skipton Sewage Treatment Works River Aire
111696 h
19
North Ferriby STW River Humber
108581 h
20
Rotherham Erskine Road SPS River Don
1071,507 h
21
Swinton Sewage Treatment Works River Don
106801 h
22
Thurgoland Sewage Pumping Station River Don
103830 h
23
City Square CSO River Aire
1031,974 h
24
West Street Combined Sewer Overflow River Ryburn
103284 h
25
Woolworths CSO River Ouse
1021,682 h

Rivers and seas it discharges into most

Spills in 2025 from Yorkshire Water's overflows, by receiving water (names grouped approximately).

1
River Aire 98 overflows
2,93217k h
2
River Calder 77 overflows
2,63016k h
3
River Ouse 40 overflows
1,81217k h
4
River Don 56 overflows
1,5089,644 h
5
River Wharfe 42 overflows
1,4959,921 h
6
River Rother 44 overflows
1,0055,894 h
7
River Colne 37 overflows
9033,283 h
8
North Sea 30 overflows
6712,745 h
9
River Humber 8 overflows
6504,086 h
10
River Dearne 24 overflows
6023,664 h

Concerned about an overflow?

Report pollution you can see to the Environment Agency on 0800 80 70 60 — they log and investigate incidents. Complaints about a company's service go to the company first.

Complain to Yorkshire Water ↗ Report pollution ↗ All companies & rankings

Live status: © Yorkshire Water storm overflow activity data, licensed under CC BY 4.0. Annual spill figures: Environment Agency Event Duration Monitoring return, © Environment Agency copyright and/or database right, Open Government Licence (OGL) v3.0. FloodRadar republishes the monitors' status and the published figures; it does not measure discharges itself, and a monitor reports a discharge, not its volume or its cause.