About this organization
Thames21's water monitoring programme relies on citizen scientists to collect crucial data on river health, focusing on water quality
Read moreRecent locations
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Whitehall Outfall 5b - River Ching
467 datapoints on 39 dates (March 14 2025 → January 18 2026)
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Quinta Open Space - Dollis Brook
212 datapoints on 13 dates (November 07 2024 → January 18 2026)
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Whitehall Outfall 5a - River Ching
471 datapoints on 39 dates (March 14 2025 → January 18 2026)
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D/S Whitehall Rd - The Ching
639 datapoints on 71 dates (July 19 2024 → January 18 2026)
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Whitehall Outfalls - The Ching
644 datapoints on 70 dates (July 19 2024 → January 18 2026)
Recent photos
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Quinta Open Space, 18 January 2026
Dataset: Brent Catchment Water Quality Working Group -
Quinta Open Space, 18 January 2026
Dataset: Brent Catchment Water Quality Working Group -
Maryon Wilson Park , 10 January 2026
Dataset: Marsh Dykes & Thamesmead Water Quality Group -
Slade Pond Inlet, 12 January 2026
Dataset: Marsh Dykes & Thamesmead Water Quality Group