/-77.052205,43.918917,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
South 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
Latest water quality data added
594,071 datapoints at 9,428 locations
+612 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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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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/-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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/-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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1,847 Datapoints
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163 Observations
- Monitored since: 24 October 2021
- Last observation on: 09 April 2026
- Data collector: Shannon Monahan
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/-88.125029,41.924657,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationMitchell Lake
Mitchell Lake , Carol Stream
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88 Datapoints
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13 Observations
- Monitored since: 21 November 2024
- Last observation on: 09 April 2026
- Data collector: Jill Mattox
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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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125 Datapoints
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20 Observations
- Monitored since: 15 November 2023
- Last observation on: 09 April 2026
- Data collector: Amy Wrigley
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/-77.090528,43.935716,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationEast side of Hamlet of Milford K0K2P0
East end of Milford Millpond on Black River , Milford
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480 Datapoints
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58 Observations
- Monitored since: 26 March 2017
- Last observation on: 09 April 2026
- Data collector: Don Ross
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/-77.087052,43.9304,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationBlack River marsh outlet from stream
Black Creek ( River ), Milford
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284 Datapoints
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27 Observations
- Monitored since: 23 March 2019
- Last observation on: 09 April 2026
- Data collector: Don Ross
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/-1.661038,52.214194,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationAlveston Weir
Avon Warwickshire, Stratford Upon Avon
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51 Datapoints
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4 Observations
- Monitored since: 08 December 2025
- Last observation on: 09 April 2026
- Data collector: Stephen Currie
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/-77.102158,43.935561,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationWest end of Hamlet of Milford at furthest west end of Millpond
Milford Millpond, Milford
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640 Datapoints
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64 Observations
- Monitored since: 26 March 2017
- Last observation on: 09 April 2026
- Data collector: Don Ross
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/-88.027633,41.794336,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationSt Joseph Creek Downers Grove
St Joseph Creek, Downers Grove
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93 Datapoints
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15 Observations
- Monitored since: 25 October 2024
- Last observation on: 09 April 2026
- Data collector: Elisabeth Grzywa
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/-88.069217,41.818212,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationEast Branch DuPage River at Morton Arb
East Branch DuPage River , Downers Grove
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73 Datapoints
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20 Observations
- Monitored since: 01 November 2023
- Last observation on: 09 April 2026
- Data collector: Lisa Warren
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/-79.341851,42.860827,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationPrivate Residence
Lake Erie, Port Colborne
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64 Datapoints
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3 Observations
- Monitored since: 19 March 2026
- Last observation on: 09 April 2026
- Data collector: NPCA Volunteer Testers
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/-88.037417,41.818373,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationLacey Creek at Morton Arboretum
Lacey Creek, Downers Grove
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93 Datapoints
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21 Observations
- Monitored since: 20 November 2023
- Last observation on: 09 April 2026
- Data collector: Linda Heuser
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/-74.665259,45.032497,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationGrays Creek Marina
St. Lawrence River, Cornwall
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29 Datapoints
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2 Observations
- Monitored since: 11 July 2025
- Last observation on: 09 April 2026
- Data collector: James Hardiment
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/-74.643602,45.035492,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationGlen Walter
St. Lawrence River, Cornwall
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44 Datapoints
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3 Observations
- Monitored since: 11 July 2025
- Last observation on: 09 April 2026
- Data collector: James Hardiment
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/-0.189024,51.616017,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImNtMG5zdzhhMjAxMnkya3IzZHVybzlxMDEifQ.3GdXd13tReOaKwengLTZTg)
View trends at this locationRiverside Park (Downstream)
Dollis Brook, London
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377 Datapoints
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33 Observations
- Monitored since: 20 May 2023
- Last observation on: 09 April 2026
- Data collector: Alistair Young
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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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441 Datapoints
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36 Observations
- Monitored since: 20 May 2023
- Last observation on: 09 April 2026
- Data collector: Alistair Young
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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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231 Datapoints
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13 Observations
- Monitored since: 15 June 2025
- Last observation on: 09 April 2026
- Data collector: Judith Howlett
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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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295 Datapoints
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18 Observations
- Monitored since: 05 February 2025
- Last observation on: 09 April 2026
- Data collector: Dianne Murphy
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