/-87.833252,41.913146,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
Evans Field - Des Plaines River -Trail Marker 215
Des Plaines River , River Grove
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88 Datapoints
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11 Observations
- Monitored since: 29 November 2024
- Last observation on: 07 February 2026
- Data collector: Serena Pesch
Latest water quality data added
568,348 datapoints at 9,411 locations
+473 new locations added in the last 30 days
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View trends at this location
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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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132 Datapoints
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17 Observations
- Monitored since: 28 December 2023
- Last observation on: 07 February 2026
- Data collector: Brenda Sibon
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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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82 Datapoints
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15 Observations
- Monitored since: 27 December 2023
- Last observation on: 07 February 2026
- Data collector: Gindi Orloff
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/-88.292574,42.166684,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationMain Street
Crystal Creek, Algonquin
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74 Datapoints
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11 Observations
- Monitored since: 25 November 2024
- Last observation on: 07 February 2026
- Data collector: JoAnn Schindler
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/-89.973615,38.534412,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationRichland Creek @ Centennial Park
Richland Creek, Belleville
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398 Datapoints
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46 Observations
- Monitored since: 07 November 2022
- Last observation on: 07 February 2026
- Data collector: Greg Kimutis
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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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51 Datapoints
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3 Observations
- Monitored since: 13 December 2025
- Last observation on: 07 February 2026
- Data collector: Bob G.
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/-0.260732,51.357527,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationDownstream Stepping Stones
Hogsmill, Epsom
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349 Datapoints
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18 Observations
- Monitored since: 22 June 2024
- Last observation on: 07 February 2026
- Data collector: Georgina Fauconier
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/-0.257835,51.356304,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationGreen Lanes A (downstream of old green lanes stream)
Hogsmill, Epsom
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312 Datapoints
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16 Observations
- Monitored since: 22 November 2024
- Last observation on: 07 February 2026
- Data collector: Georgina Fauconier
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/-88.36838,42.289958,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationPowers Creek
Powers Creek Headwaters, Woodstock
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81 Datapoints
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11 Observations
- Monitored since: 26 November 2024
- Last observation on: 06 February 2026
- Data collector: Luke Baldwin
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/-88.367414,42.290056,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationTrout Pond Outlet
Lower Trout pond , Woodstock
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88 Datapoints
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12 Observations
- Monitored since: 26 November 2024
- Last observation on: 06 February 2026
- Data collector: Luke Baldwin
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/-88.351107,41.930044,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationFerson Creek at LeRoy Oakes FP Bridge
Ferson Creek, Saint Charles
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131 Datapoints
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18 Observations
- Monitored since: 08 November 2023
- Last observation on: 06 February 2026
- Data collector: Jim Baum
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/-82.571354,42.012491,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationMarina North - Caldwell First Nation
Sturgeon Creek North, Leamington
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247 Datapoints
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10 Observations
- Monitored since: 25 July 2025
- Last observation on: 06 February 2026
- Data collector: Shelley Birch
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/-82.463931,42.061736,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationWheatley Harbour Boat Launch
Lake Erie , Wheatley
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37 Datapoints
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2 Observations
- Monitored since: 23 January 2026
- Last observation on: 06 February 2026
- Data collector: Kayla Simpson
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/-82.570764,42.012248,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationMarina South- Caldwell First Nation
Sturgeon Creek South, Leamington
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218 Datapoints
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9 Observations
- Monitored since: 25 July 2025
- Last observation on: 06 February 2026
- Data collector: Steve Simpson
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/-90.133189,38.486377,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationHickman's Creek @ Zingg & Seager Rd.
Hickman's Creek , Millstadt
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135 Datapoints
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13 Observations
- Monitored since: 02 November 2024
- Last observation on: 06 February 2026
- Data collector: Greg Kimutis
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/-90.101581,38.485018,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationPrairie DuPont Creek @ Zingg Bridge
Prairie DuPont Tributary, Millstadt
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523 Datapoints
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61 Observations
- Monitored since: 07 November 2022
- Last observation on: 06 February 2026
- Data collector: Greg Kimutis
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/-0.067036,50.904129,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationPlumpton Place
Upper Lake, Lewes
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19 Datapoints
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1 Observations
- Monitored since: 06 February 2026
- Last observation on: 06 February 2026
- Data collector: Jo Owens
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/-0.188778,51.616235,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationOutfall at RMI Site
Dollis Brook , London
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169 Datapoints
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10 Observations
- Monitored since: 15 June 2025
- Last observation on: 06 February 2026
- Data collector: Judith Howlett
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/-0.188847,51.616455,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationRiverside Park (Upstream)
Dollis Brook, London
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340 Datapoints
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31 Observations
- Monitored since: 20 May 2023
- Last observation on: 06 February 2026
- Data collector: Alistair Young
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/-0.189478,51.617261,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationFolly pre confluence
Folly Brook, London
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235 Datapoints
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15 Observations
- Monitored since: 05 February 2025
- Last observation on: 06 February 2026
- Data collector: Dianne Murphy
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