Featured river · mersey
River Mersey
70 miles through Manchester and Liverpool. Once Britain's most polluted river — recovering, but heavily monitored.
128
Storm overflows
0
Active right now
50
Spill events · 24 h
12
Open discrepancies
2
Monitors offline
90
WIMS sampling points
10
Hydrology stations
Spill record· last 12 months · across the river
807
spill events
+26800% vs prior 12m
69,787h
cumulative discharge
+2850195% vs prior 12m
20 weeks
longest single event (all time)
2024-12-01
first event on record
Truth Engine flags· 12 open
- CriticalDry-weather spillUnited Utilities · UUP00188 · River Mersey
- WarnDry-weather spillUnited Utilities · UUP00822 · River Goyt, A Tributary of the River Mersey
- WarnDry-weather spillSevern Trent Water · SVT00829 · TRIB OF TRENT AND MERSEY CANAL
- WarnMonitor offlineUnited Utilities · UUP00748 · River Mersey via SW Sewer
- WarnMonitor offlineUnited Utilities · UUP01926 · River Mersey
- CautionLevel spike near offline monitorUnited Utilities · UUP01926 · River Mersey
- CautionDry-weather spillUnited Utilities · UUP01266 · River Mersey Estuary
- CautionDry-weather spillUnited Utilities · UUP01500 · River Mersey
- WatchDry-weather spillUnited Utilities · UUP02194 · Mersey Estuary
- WatchDry-weather spillUnited Utilities · UUP01289 · The Mersey Estuary
- WatchDry-weather spillUnited Utilities · UUP00678 · Mersey Estuary (tidal)
- WatchDry-weather spillUnited Utilities · UUP01659 · Rivacre Brook a tributary of the River Mersey
Recent spill events· last 7 days · 30
- 2026-08-04 20:32 UTCUnited Utilities · UUP00335 · Mersey Estuary37 min
- 2026-08-04 20:18 UTCUnited Utilities · UUP01161 · Mersey Estuary7 min
- 2026-08-04 18:37 UTCUnited Utilities · UUP00822 · River Goyt, A Tributary of the River Mersey7 min
- 2026-08-04 18:32 UTCUnited Utilities · UUP01918 · The Mersey Estuary43 min
- 2026-08-04 18:21 UTCUnited Utilities · UUP01161 · Mersey Estuaryongoing
- 2026-08-04 18:18 UTCUnited Utilities · UUP00641 · Mersey Estuary10 min
- 2026-08-04 18:00 UTCUnited Utilities · UUP02010 · River Mersey Estuary1.5 h
- 2026-08-04 17:49 UTCUnited Utilities · UUP00336 · Mersey Estuary1.4 h
- 2026-08-04 17:46 UTCUnited Utilities · UUP01831 · Mersey Estuary28 min
- 2026-08-04 17:32 UTCUnited Utilities · UUP00188 · River Mersey1.2 h
- 2026-08-04 17:06 UTCUnited Utilities · UUP01867 · River Mersey2.5 h
- 2026-08-04 17:02 UTCUnited Utilities · UUP02241 · River Mersey1.1 h
- 2026-08-04 16:58 UTCUnited Utilities · UUP00762 · River Mersey (via a surface water sewer)6 min
- 2026-08-04 16:56 UTCUnited Utilities · UUP00816 · River Mersey (via a surface water sewer)6 min
- 2026-08-04 16:54 UTCUnited Utilities · UUP00054 · River Mersey1.6 h
- 2026-08-04 16:52 UTCUnited Utilities · UUP00064 · River Mersey8 min
- 2026-08-04 16:50 UTCUnited Utilities · UUP01964 · River Mersey46 min
- 2026-08-04 16:50 UTCUnited Utilities · UUP00326 · River Mersey8 min
- 2026-08-04 16:49 UTCUnited Utilities · UUP02194 · Mersey Estuary28 min
- 2026-08-04 16:48 UTCUnited Utilities · UUP01915 · River Mersey via Sykes Sewer6 min
- 2026-08-04 16:46 UTCUnited Utilities · UUP01582 · River Mersey20 min
- 2026-08-04 16:46 UTCUnited Utilities · UUP01861 · River Mersey Estuary (via a surface water sewer)16 min
- 2026-08-04 16:46 UTCUnited Utilities · UUP01965 · River Mersey44 min
- 2026-08-04 16:44 UTCUnited Utilities · UUP01915 · River Mersey via Sykes Sewerongoing
- 2026-08-04 16:42 UTCUnited Utilities · UUP01289 · The Mersey Estuary14 min
- 2026-08-04 16:24 UTCUnited Utilities · UUP00678 · Mersey Estuary (tidal)22 min
- 2026-08-04 16:22 UTCUnited Utilities · UUP01659 · Rivacre Brook a tributary of the River Mersey22 min
- 2026-08-04 16:21 UTCUnited Utilities · UUP01266 · River Mersey Estuary1.2 h
- 2026-08-04 14:50 UTCUnited Utilities · UUP02241 · River Mersey1.3 h
- 2026-08-04 13:52 UTCUnited Utilities · UUP01867 · River Mersey3.1 h