/-87.7531,41.923,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
Oswego
Fox River, Chicago
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36 Datapoints
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7 Observations
- Monitored since: 12 November 2025
- Last observation on: 13 May 2026
- Data collector: Lara Owczarski
Latest water quality data added
609,759 datapoints at 9,509 locations
+688 new locations added in the last 30 days
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View trends at this location
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/-81.469138,28.485893,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationKC's Dock
Lake Cane, Orlando
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1,880 Datapoints
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166 Observations
- Monitored since: 24 October 2021
- Last observation on: 13 May 2026
- Data collector: Shannon Monahan
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/60.7547,46.0999,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationBras D'Or Lake
Bras D'Or Lakes
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28 Datapoints
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2 Observations
- Monitored since: 30 April 2026
- Last observation on: 13 May 2026
- Data collector: Susanne O'Brien
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/-88.160541,41.697109,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationSpringbrook Water Reclamation Center Upstream
DuPage River, Bolingbrook
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132 Datapoints
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21 Observations
- Monitored since: 15 November 2023
- Last observation on: 12 May 2026
- Data collector: Amy Wrigley
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/-88.441272,41.781438,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationBliss Woods -Blackberry Creek
Bliss Woods -Blackberry Creek, Sugar Grove
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147 Datapoints
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20 Observations
- Monitored since: 28 December 2023
- Last observation on: 12 May 2026
- Data collector: Brenda Sibon
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/-88.301711,41.885825,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationFox River
Fox River, Geneva
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129 Datapoints
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22 Observations
- Monitored since: 08 January 2024
- Last observation on: 12 May 2026
- Data collector: Anna Browne
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/-88.410695,41.932391,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationMill Creek at Campton FP
Mill Creek, Saint Charles
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97 Datapoints
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18 Observations
- Monitored since: 27 December 2023
- Last observation on: 12 May 2026
- Data collector: Gindi Orloff
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/-88.078616,41.811882,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationArbor Lake at Morton Arb
Arbor Lake , Lisle
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135 Datapoints
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21 Observations
- Monitored since: 01 November 2023
- Last observation on: 12 May 2026
- Data collector: Lisa Warren
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/-88.763596,41.932551,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationInflow to East Lagoon at Montgomery to Faraday pedestrian bridge
Inflow to East Lagoon, Dekalb
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34 Datapoints
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4 Observations
- Monitored since: 23 December 2025
- Last observation on: 12 May 2026
- Data collector: WILLIAM MARTIN
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/-88.760626,41.933904,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationSouth Branch Kishwaukee River at College Ave.
South Branch Kishwaukee River, Dekalb
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211 Datapoints
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25 Observations
- Monitored since: 12 December 2023
- Last observation on: 12 May 2026
- Data collector: WILLIAM MARTIN
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/-0.303337,51.584207,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationWealdstone Brook Woodcock Park Mural Bridge
Wealdstone Brook, London
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167 Datapoints
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8 Observations
- Monitored since: 31 August 2025
- Last observation on: 12 May 2026
- Data collector: Alistair Young
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/-0.292823,51.581297,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationImperial Way Bridge - Lindsay Drive Roundabout
Wealdstone Brook, London
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289 Datapoints
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17 Observations
- Monitored since: 07 April 2025
- Last observation on: 12 May 2026
- Data collector: Alistair Young
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/-0.293165,51.5818,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationFalcon Way bridge - Lindsay Drive roundabout
Wealdstone Brook, Harrow
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252 Datapoints
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13 Observations
- Monitored since: 19 August 2025
- Last observation on: 12 May 2026
- Data collector: John Poole
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/-1.485922,53.794859,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationHalton Moor Cartmell Drive
Wyke Beck, Leeds
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150 Datapoints
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12 Observations
- Monitored since: 28 May 2025
- Last observation on: 12 May 2026
- Data collector: Ann Chapman
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/-0.156959,51.638422,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationOak Hill Park 2 (Downstream)
Pymmes Brook, London
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199 Datapoints
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13 Observations
- Monitored since: 01 July 2023
- Last observation on: 12 May 2026
- Data collector: Philly Nicholls
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/-0.164216,51.656668,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationDownstream of Jack’s Lake
Pymmes Brook, London
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179 Datapoints
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11 Observations
- Monitored since: 26 February 2025
- Last observation on: 12 May 2026
- Data collector: Jack Beard
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/-0.085177,50.907931,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationSCN Middleton
Plumpton Stream, Hassocks
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37 Datapoints
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4 Observations
- Monitored since: 09 April 2026
- Last observation on: 12 May 2026
- Data collector: Jo Owens
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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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503 Datapoints
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38 Observations
- Monitored since: 21 March 2025
- Last observation on: 12 May 2026
- Data collector: Harrison Tremain
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/0.008952,51.618979,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationHatch Roundabout - Upstream
The Ching, London
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517 Datapoints
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39 Observations
- Monitored since: 21 March 2025
- Last observation on: 12 May 2026
- Data collector: Harrison Tremain
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/-113.469329,53.55059,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationDawson Park - Boat launch
North Saskatchewan River, Edmonton
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29 Datapoints
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1 Observations
- Monitored since: 11 May 2026
- Last observation on: 11 May 2026
- Data collector: Janelle Spry
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