/-88.387628,41.831276,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
Lake Run at Nelson Lake in Dick Young Forest Preserve
Lake Run, Batavia
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90 Datapoints
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17 Observations
- Monitored since: 28 November 2023
- Last observation on: 14 February 2026
- Data collector: Maureen Mrenna
Latest water quality data added
570,041 datapoints at 9,258 locations
+457 new locations added in the last 30 days
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View trends at this location
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/-88.134856,41.754183,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationDuPage River, West Branch
DuPage River, West Branch, Naperville
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42 Datapoints
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11 Observations
- Monitored since: 24 November 2024
- Last observation on: 14 February 2026
- Data collector: BRENDAN BANASZAK
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/-0.217023,51.640514,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationQuinta Open Space
Dollis Brook, London
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228 Datapoints
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14 Observations
- Monitored since: 07 November 2024
- Last observation on: 14 February 2026
- Data collector: Harrison Tremain
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/0.089049,51.481147,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationSlade Pond Inlet
Slade Pond, London
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193 Datapoints
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12 Observations
- Monitored since: 25 April 2024
- Last observation on: 14 February 2026
- Data collector: Zara Visanji
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/-0.081703,51.626611,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationOutlet
Moore's Brook, London
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197 Datapoints
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15 Observations
- Monitored since: 08 March 2025
- Last observation on: 14 February 2026
- Data collector: Rodger Thompstone
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/-0.086723,51.628245,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationNorth Inlet
Moore's Brooķ, London
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190 Datapoints
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13 Observations
- Monitored since: 08 March 2025
- Last observation on: 14 February 2026
- Data collector: Rodger Thompstone
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/-0.087569,51.627165,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationSouth Inlet
Moore's Brook, London
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178 Datapoints
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13 Observations
- Monitored since: 08 March 2025
- Last observation on: 14 February 2026
- Data collector: Rodger Thompstone
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/0.042315,51.486184,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationMaryon Wilson Park
Stream in Maryon Wilson Park, London
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173 Datapoints
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13 Observations
- Monitored since: 25 April 2024
- Last observation on: 14 February 2026
- Data collector: Zara Visanji
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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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111 Datapoints
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18 Observations
- Monitored since: 15 November 2023
- Last observation on: 13 February 2026
- Data collector: Amy Wrigley
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/-64.376368,45.94853,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationJoe Brook
Joe Brook, Sackville
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46 Datapoints
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4 Observations
- Monitored since: 15 January 2026
- Last observation on: 13 February 2026
- Data collector: Miranda Corkum
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/-64.3558,45.9272,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationSilver Lake
Silver Lake, Sackville
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53 Datapoints
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4 Observations
- Monitored since: 15 January 2026
- Last observation on: 13 February 2026
- Data collector: Miranda Corkum
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/-88.308348,41.870064,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationFabyan Forest Preserve
Fox River, Geneva
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220 Datapoints
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39 Observations
- Monitored since: 13 January 2022
- Last observation on: 13 February 2026
- Data collector: Maureen Huey
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/-123.410381,48.634912,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationSite 1 Culvert
Reay Creek, North Saanich
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201 Datapoints
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23 Observations
- Monitored since: 25 July 2025
- Last observation on: 13 February 2026
- Data collector: Allison Weber
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/-87.701724,41.973181,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationRiver Park Boathouse
Chicago River, Chicago
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305 Datapoints
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44 Observations
- Monitored since: 02 January 2023
- Last observation on: 13 February 2026
- Data collector: Susanna Lang
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/-123.411054,48.635359,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationSite 2 Metal Bridge
Reay Creek, North Saanich
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197 Datapoints
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22 Observations
- Monitored since: 22 August 2025
- Last observation on: 13 February 2026
- Data collector: Allison Weber
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/-123.41436,48.637935,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationFrost Avenue
Reay Creek, Sidney
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195 Datapoints
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23 Observations
- Monitored since: 22 August 2025
- Last observation on: 13 February 2026
- Data collector: Allison Weber
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/-88.348618,40.279619,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationSangamon River Forest Preserve
Wildcat Slough, Mahomet
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274 Datapoints
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31 Observations
- Monitored since: 06 November 2022
- Last observation on: 13 February 2026
- Data collector: Bruce M Colravy
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/-88.351042,40.279051,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationSangamon River Forest Preserve site
Sangamon River, Fisher
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460 Datapoints
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47 Observations
- Monitored since: 07 November 2021
- Last observation on: 13 February 2026
- Data collector: Bruce M Colravy
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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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96 Datapoints
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16 Observations
- Monitored since: 08 January 2024
- Last observation on: 13 February 2026
- Data collector: Anna Browne
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/-88.387113,40.204014,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationLake of the Woods Forest Preserve
Sangamon River, Mahomet
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416 Datapoints
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46 Observations
- Monitored since: 07 November 2021
- Last observation on: 13 February 2026
- Data collector: Bruce M Colravy
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