/-0.466797,51.369223,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
Mayfield Road
River Wey, Weybridge
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86 Datapoints
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6 Observations
- Monitored since: 27 March 2025
- Last observation on: 18 January 2026
- Data collector: Jessica Harris
Latest water quality data added
560,293 datapoints at 9,366 locations
+472 new locations added in the last 30 days
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View trends at this location
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/0.019638,51.626279,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationWhitehall Outfall 5b
River Ching, Buckhurst Hill
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467 Datapoints
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39 Observations
- Monitored since: 14 March 2025
- Last observation on: 18 January 2026
- Data collector: Harrison Tremain
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View trends at this location
Whitehall Outfall 5a
River Ching, Buckhurst Hill
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471 Datapoints
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39 Observations
- Monitored since: 14 March 2025
- Last observation on: 18 January 2026
- Data collector: Harrison Tremain
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/0.016257,51.621835,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationNewgate Street
The Ching, Buckhurst Hill
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612 Datapoints
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69 Observations
- Monitored since: 19 July 2024
- Last observation on: 18 January 2026
- Data collector: Kat Kavanagh
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/0.019402,51.625457,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationD/S Whitehall Rd
The Ching, Buckhurst Hill
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639 Datapoints
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71 Observations
- Monitored since: 19 July 2024
- Last observation on: 18 January 2026
- Data collector: Kat Kavanagh
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/0.019922,51.626392,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationWhitehall Outfalls
The Ching, Buckhurst Hill
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644 Datapoints
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70 Observations
- Monitored since: 19 July 2024
- Last observation on: 18 January 2026
- Data collector: Kat Kavanagh
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/-1.022029,51.320131,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationLongbridge Mill
River Loddon, Sherfield On Loddon
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214 Datapoints
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14 Observations
- Monitored since: 21 February 2025
- Last observation on: 18 January 2026
- Data collector: Josh Bowes
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/-123.327854,48.437203,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationKings Greenspace
Bowker Creek, Victoria
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118 Datapoints
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7 Observations
- Monitored since: 14 September 2025
- Last observation on: 17 January 2026
- Data collector: Eldan Goldenberg
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/-123.344631,48.448819,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationCedar Hill Rec, downstream option
Bowker Creek , Victoria
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118 Datapoints
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7 Observations
- Monitored since: 14 September 2025
- Last observation on: 17 January 2026
- Data collector: Eldan Goldenberg
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/-123.334286,48.452003,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationBrowning Park
Bowker Creek, Victoria
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563 Datapoints
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101 Observations
- Monitored since: 16 February 2024
- Last observation on: 17 January 2026
- Data collector: andrea gleichauf
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/-0.286406,51.363414,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationBonegate Stream
Bonesgate Stream, Epsom
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297 Datapoints
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15 Observations
- Monitored since: 18 December 2024
- Last observation on: 17 January 2026
- Data collector: Robb Reeves
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/-89.05956,42.290505,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationSpring Creek at Anderson Gardens
Spring Creek, Loves Park
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33 Datapoints
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2 Observations
- Monitored since: 13 December 2025
- Last observation on: 17 January 2026
- Data collector: Bob G.
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/-88.181745,41.796592,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationMc Dowell Forest Preserve
the DuPage River, West Branch, Naperville
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21 Datapoints
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3 Observations
- Monitored since: 17 November 2025
- Last observation on: 16 January 2026
- Data collector: shirley watters
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/-89.419958,38.897928,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this location140 and 127 in Greenville
East Fork Shoal Creek, Greenville
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61 Datapoints
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5 Observations
- Monitored since: 27 December 2024
- Last observation on: 16 January 2026
- Data collector: Nathaniel Brown
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/-88.543496,30.414609,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationRhodes Bayou - Pascagoula River Audubon Center
Rhodes Bayou, Moss Point
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23 Datapoints
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1 Observations
- Monitored since: 16 January 2026
- Last observation on: 16 January 2026
- Data collector: Madison Gnoose
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/-0.115829,51.630991,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationGrovelands Park Lake Downstream of reedbeds
Salmons Brook/Houndsden Gutter/Grovelands Stream, London
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325 Datapoints
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47 Observations
- Monitored since: 12 August 2024
- Last observation on: 16 January 2026
- Data collector: Philly Nicholls
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/-0.112069,51.632232,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationGrovelands Park Lake Outfall by cafe and dam
Salmons Brook/Houndsden Gutter/Grovelands Stream, London
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474 Datapoints
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94 Observations
- Monitored since: 23 April 2023
- Last observation on: 16 January 2026
- Data collector: Alistair Young
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/-0.116322,51.630718,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationGrovelands Park Lake Entry
Salmons Brook/Houndsden Gutter/Grovelands Stream, London
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554 Datapoints
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107 Observations
- Monitored since: 23 April 2023
- Last observation on: 16 January 2026
- Data collector: Alistair Young
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/-0.111863,51.633371,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationGrovelands Park Stream below dam
Salmons Brook/Houndsden Gutter/Grovelands Stream, London
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453 Datapoints
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84 Observations
- Monitored since: 30 July 2023
- Last observation on: 16 January 2026
- Data collector: Alistair Young
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/0.00869,51.618456,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationHatch Roundabout - Downstream
The Ching, London
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309 Datapoints
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24 Observations
- Monitored since: 21 March 2025
- Last observation on: 16 January 2026
- Data collector: Harrison Tremain
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