Sewage Map

The Serpentine - Hyde Park water quality and sewage map

The Serpentine - Hyde Park is a designated lake bathing water in Hertfordshire and North London. Its 2025 classification is Good. 7 sewage outlet records sit within 3 km of the monitoring point. Check the official advice before entering the water.

Good
2025 classification
1,998
Designated since
7
Outlets within 3 km
6
Linked to a live feed

The annual classification meets the Good class. The annual class is not a live test. The bathing-water point is an approximate official monitoring location, and 3 km is a straight-line search.

Check official bathing-water advice ↗How to read the evidence

Annual classification history

The rating changed from Sufficient in 2024 to Good in 2025. A change between annual classes does not describe conditions today. A missing class stays unknown, and a newly designated site may not have a full history.

YearClassification
2025Good
2024Sufficient
2023Sufficient
2022Sufficient
2021Sufficient

Sewage outlets within 3 km

Filter by the latest company report. The map follows the filters. This is a location search, not a list of outlets proven to affect The Serpentine - Hyde Park, and it does not include every possible source of pollution.

Filters apply to the map and list. Recent stops need a current report and a recorded stop time. They do not show whether water is safe.

Showing 7 of 7 outlets

Open full map
  • Queen street

    Thames Water · R.THAMES ( Tidal )

    Current status unknown
    2025 annual record:2spills0.2hours
  • Chelsea, london, sw10

    Thames Water · Thames Tidal

    Current status unknown
    2025 annual record:0spills0hours
  • Smith street

    Thames Water · R.THAMES ( Tidal )

    Current status unknown
    2025 annual record:6spills4.8hours
  • Sloane street, raneleigh gardens

    Thames Water · R.THAMES ( Tidal )

    Current status unknown
    2025 annual record:1spill4.4hours
  • Church street sewer

    Thames Water · R.THAMES ( Tidal )

    Current status unknown
    2025 annual record:2spills1.2hours
  • Western (Pimlico) SPS

    Thames Water · R.THAMES ( Tidal )

    Current status unknown
    2025 annual record:5spills23.8hours
  • Lots Road (Chelsea) Storm SPS

    Thames Water · R.THAMES ( Tidal )

    Current status unknown
    2025 annual record:1spill9.3hours

Before you visit

  1. Open the official bathing-water profile for current advice.
  2. Read local signs and check local conditions.
  3. Use the Swim Healthy guidance to reduce open-water risks.

Designation and a map point do not establish parking, lifeguard cover, access or a safe route. A stopped overflow report does not mean that the bathing water is safe.

All outlet records within 3 km of The Serpentine - Hyde Park

7 outlet records in alphabetical order. Each link opens the outlet page with its latest report and annual history.

Sources and dates

Bathing-water file updated 6 July 2026. Source checked 9 September 2026. Outlet spill figures refer to 2025. Monitoring reference: UK11940. © Environment Agency copyright and/or database right 2015. All rights reserved. Used under the Open Government Licence v3.0.

Environment Agency monitoring locationsAll sourcesReport pollution

Questions about The Serpentine - Hyde Park

Is The Serpentine - Hyde Park safe to swim in today?
This page cannot answer that. The annual classification describes a longer-term record, and an outlet report describes monitor activity at one outlet. Check the official bathing-water profile, local signs and current conditions before entering the water.
What does the The Serpentine - Hyde Park classification mean?
The annual classification meets the Good class. The Environment Agency sets the class from water samples taken over several bathing seasons, not from a single visit.
Has the water quality at The Serpentine - Hyde Park changed?
The rating changed from Sufficient in 2024 to Good in 2025. We hold standard classifications for 5 years, from 2021 to 2025. The table above lists every year in the record.
Are there sewage outlets near The Serpentine - Hyde Park?
7 outlet records fall within 3 km of the monitoring point. The nearest is Queen street, about 2.4 km away. Distance alone does not show whether an outlet affects this water.
Which outlets near The Serpentine - Hyde Park are linked to a live feed?
6 of the 7 nearby records are matched to a monitor in a company live feed. A link does not mean the monitor is working now. Use the status filters above to check the latest report and its date. A stopped report does not mean the bathing water is safe.