/-0.056198,51.573056,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
Bridge by Springfield Marina
Coppermill Stream, London
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43 Datapoints
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3 Observations
- Monitored since: 08 June 2025
- Last observation on: 09 January 2026
- Data collector: Harrison Tremain
Latest water quality data added
560,643 datapoints at 9,366 locations
+444 new locations added in the last 30 days
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View trends at this location
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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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19 Datapoints
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3 Observations
- Monitored since: 24 November 2025
- Last observation on: 08 January 2026
- Data collector: Patricia Gawrys
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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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953 Datapoints
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61 Observations
- Monitored since: 12 June 2020
- Last observation on: 08 January 2026
- Data collector: Abby Braman
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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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105 Datapoints
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17 Observations
- Monitored since: 15 November 2023
- Last observation on: 08 January 2026
- Data collector: Amy Wrigley
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/-88.341601,41.933564,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationFerson Creek at Randall Road bike trail bridge
Ferson Creek, Saint Charles
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128 Datapoints
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17 Observations
- Monitored since: 15 December 2023
- Last observation on: 08 January 2026
- Data collector: Rod Allen
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/-87.972529,41.921152,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationSalt Creek
Salt creek, Addison
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122 Datapoints
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17 Observations
- Monitored since: 05 January 2024
- Last observation on: 08 January 2026
- Data collector: Sarah Porterfield
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/-89.62213,40.705193,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationDry Run Creek in Lower Bradley Park
Dry Run Creek, Peoria
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117 Datapoints
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13 Observations
- Monitored since: 23 December 2023
- Last observation on: 08 January 2026
- Data collector: Robert Rowe
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/-91.51421,41.74588,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationTurkey Creek Nature Preserve
Turkey Creek #2 (N), Solon
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59 Datapoints
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4 Observations
- Monitored since: 19 November 2025
- Last observation on: 08 January 2026
- Data collector: Olivia Gibbs
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/-91.516018,41.739497,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationTurkey Creek Nature Preserve
Turkey Creek #1 (S), Solon
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44 Datapoints
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3 Observations
- Monitored since: 19 November 2025
- Last observation on: 08 January 2026
- Data collector: Olivia Gibbs
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/-91.584236,41.720091,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationMuddy Creek Preserve
Muddy Creek #2 (NW), North Liberty
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58 Datapoints
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4 Observations
- Monitored since: 19 November 2025
- Last observation on: 08 January 2026
- Data collector: Olivia Gibbs
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/-91.580418,41.717711,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationMuddy Creek Preserve
Muddy Creek #1 (NE), Coralville
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57 Datapoints
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4 Observations
- Monitored since: 19 November 2025
- Last observation on: 08 January 2026
- Data collector: Olivia Gibbs
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/-0.807023,51.158542,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationFootbridge downstream of junction with Frensham Pond outlet
River Wey, Blacknest
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324 Datapoints
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19 Observations
- Monitored since: 30 May 2022
- Last observation on: 08 January 2026
- Data collector: Fiona Scimone
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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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113 Datapoints
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17 Observations
- Monitored since: 18 November 2023
- Last observation on: 07 January 2026
- Data collector: Tony Ream
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/-88.284498,42.125044,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationFox River
river, Carpentersville
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81 Datapoints
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13 Observations
- Monitored since: 06 November 2023
- Last observation on: 07 January 2026
- Data collector: Chris Kious
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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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291 Datapoints
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43 Observations
- Monitored since: 02 January 2023
- Last observation on: 07 January 2026
- Data collector: Susanna Lang
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/-88.128398,41.746635,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationPioneer Park
West Branch DuPage River, Naperville
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69 Datapoints
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16 Observations
- Monitored since: 17 November 2023
- Last observation on: 07 January 2026
- Data collector: Kyla Muhammad
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/-88.201933,41.938488,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationTurnmill Pond - Smythe Settlement
Turnmill Pond, West Chicago
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122 Datapoints
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16 Observations
- Monitored since: 29 November 2023
- Last observation on: 07 January 2026
- Data collector: Steve Slivka
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/-88.199165,41.94358,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationArmy Trail West Pond - Smythe Settlement
Army Trail West Pond, West Chicago
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124 Datapoints
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16 Observations
- Monitored since: 29 November 2023
- Last observation on: 07 January 2026
- Data collector: Steve Slivka
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/-88.197062,41.938536,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationTrinity South Pond - Smythe Settlement
Trinity South Pond, West Chicago
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129 Datapoints
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16 Observations
- Monitored since: 29 November 2023
- Last observation on: 07 January 2026
- Data collector: Steve Slivka
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/-89.653158,40.710605,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationKickapoo Creek at Vicary Bottom Park
Kickapoo Creek, Peoria
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123 Datapoints
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14 Observations
- Monitored since: 23 December 2023
- Last observation on: 07 January 2026
- Data collector: Robert Rowe
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