/-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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117 Datapoints
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13 Observations
- Monitored since: 29 November 2024
- Last observation on: 11 April 2026
- Data collector: Serena Pesch
Latest water quality data added
594,281 datapoints at 9,429 locations
+614 new locations added in the last 30 days
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View trends at this location
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/-88.050718,41.890335,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationEast DuPage river at St. Charles
East branch DuPage River, Glen Ellyn
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97 Datapoints
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20 Observations
- Monitored since: 15 November 2023
- Last observation on: 11 April 2026
- Data collector: Chris Thomson
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/-89.369273,40.160198,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationBrainard's Branch, Grand Ave bridge between 19th and 20th Sts
Brainard's Branch, Lincoln
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148 Datapoints
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16 Observations
- Monitored since: 15 December 2023
- Last observation on: 11 April 2026
- Data collector: Pamela Moriearty
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/-88.023834,41.893477,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationTerrace View Park Pond in Lombard, IL
Terrace View Park Pond, Lombard
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127 Datapoints
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19 Observations
- Monitored since: 18 November 2023
- Last observation on: 11 April 2026
- Data collector: Tony Ream
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/0.210025,51.477671,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationBurnett Road, Erith
Erith Marshes, Erith
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111 Datapoints
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7 Observations
- Monitored since: 18 July 2025
- Last observation on: 11 April 2026
- Data collector: Paul Brewster
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/-89.37633,40.173397,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationKickapoo Creek Park, 2000 N. Jefferson St., Lincoln, IL pedestrian bridge on park road
Kickapoo Creek, Lincoln
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143 Datapoints
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16 Observations
- Monitored since: 15 December 2023
- Last observation on: 11 April 2026
- Data collector: Pamela Moriearty
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/-77.091622,43.97895,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationBridge over Black Creek on Old Milford Rd
Section of Black Creek,
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278 Datapoints
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31 Observations
- Monitored since: 30 March 2019
- Last observation on: 11 April 2026
- Data collector: Don Ross
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/-0.162522,51.595286,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationEast Finchley Allotments - East Stream
Bounds Green Brook, London
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97 Datapoints
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5 Observations
- Monitored since: 25 October 2025
- Last observation on: 11 April 2026
- Data collector: Harrison Tremain
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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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235 Datapoints
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18 Observations
- Monitored since: 08 March 2025
- Last observation on: 11 April 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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228 Datapoints
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16 Observations
- Monitored since: 08 March 2025
- Last observation on: 11 April 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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217 Datapoints
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16 Observations
- Monitored since: 08 March 2025
- Last observation on: 11 April 2026
- Data collector: Rodger Thompstone
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/0.220521,51.142157,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationShadwell woods
No name on OS map, Tunbridge Wells
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42 Datapoints
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2 Observations
- Monitored since: 31 March 2026
- Last observation on: 11 April 2026
- Data collector: Tina Bone
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/0.219419,51.14112,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationOff Farnham Lane
Farnham lane , Tunbridge Wells
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41 Datapoints
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2 Observations
- Monitored since: 31 March 2026
- Last observation on: 11 April 2026
- Data collector: Tina Bone
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/-90.145741,32.32482,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationLeFleurs Bluff State Park
Pearl River, Jackson
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996 Datapoints
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64 Observations
- Monitored since: 12 June 2020
- Last observation on: 10 April 2026
- Data collector: Abby Braman
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/-77.052205,43.918917,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationSouth Bay Cres Public Boat Launch
Creek leading to South Bay on Lake Ontario, Milford
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577 Datapoints
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50 Observations
- Monitored since: 28 March 2018
- Last observation on: 10 April 2026
- Data collector: Don Ross
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/-88.321114,41.928527,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationFerson Creek Park, Route 31, Saint Charles, IL
Ferson Creek, St. Charles
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41 Datapoints
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6 Observations
- Monitored since: 24 November 2025
- Last observation on: 10 April 2026
- Data collector: Patricia Gawrys
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/-0.252608,51.61226,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationLyndhurst Park (downstream of culvert)
Burnt Oak Brook, London
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93 Datapoints
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14 Observations
- Monitored since: 02 February 2024
- Last observation on: 10 April 2026
- Data collector: Alistair Young
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/-0.253737,51.611927,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationThe Meads (upstream)
Burnt Oak Brook, London
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62 Datapoints
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4 Observations
- Monitored since: 28 November 2024
- Last observation on: 10 April 2026
- Data collector: Kath Vos
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/-0.261014,51.610084,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationThe Meads/Deansbrook rd
Burnt Oak Brook, Edgware
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45 Datapoints
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3 Observations
- Monitored since: 28 August 2025
- Last observation on: 10 April 2026
- Data collector: Kath Vos
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/-1.541519,52.288323,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationRiver Leam North Bank RLSCC
River Leam, Leamington
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265 Datapoints
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22 Observations
- Monitored since: 16 July 2024
- Last observation on: 10 April 2026
- Data collector: Jo Beckett
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