Designated bathing water · official register
The Serpentine - Hyde Park
City of Westminster
The Environment Agency's classification is good and no short-term pollution warning is active. Based on the EA classification Good (2025) and no active short-term pollution warning.
Latest EA sample· 26 Jun 2026
55
E. coli · cfu/100ml
110
Intestinal enterococci · cfu/100ml
Storm overflows within 5.0 km
Monitored sewage discharge points near this bathing water, from the National Storm Overflow Hub. An active spill upstream can affect water quality before it shows up in lab samples.
29
Storm overflows
0
Spilling now
1
Monitors offline
0
Spills · 24 h
- Thames Water · TWL00360 · River Thamesoffline3.5 km
- Thames Water · TWL00339 · River Thamesinactive2.4 km
- Thames Water · TWL00100 · River Thamesinactive2.5 km
- Thames Water · TWL00372 · River Thamesinactive2.4 km
- Thames Water · TWL00087 · River Thamesinactive2.4 km
- Thames Water · TWL00371 · River Thames (via the Tideway tunnel)inactive2.5 km
- Thames Water · TWL00116 · River Thames (via the Tideway tunnel)inactive3.0 km
- Thames Water · TWL00440 · River Thamesinactive2.6 km
- Thames Water · TWL00179 · River Thamesinactive4.1 km
- Thames Water · TWL00220 · River Thamesinactive3.3 km
About this verdict
The classification, lab samples and pollution warnings above are the Environment Agency's own published data for this designated site; River Truth adds live storm-overflow context from the National Storm Overflow Hub. Sample results reflect water quality at the time of testing and this page is not formal bathing advice — heed any on-site signage.