Locations

Locations are places where people have tested before. Click on any location report to view water health trends at that spot over time. What's this?

8,229 locations

+33 new sample locations added in the past 30 days

Ottawa River: Ottawa River

Chute à Blondeau, Ontario, Canada

Waterbody Type:
River
Last observed: September 11, 2025
Monitored since: April 13, 2019
63 Observations
0 Issues

Hogsmill: Berrylands Bridge

London, Kingston upon Thames, United Kingdom

Waterbody Type:
River
Last observed: September 11, 2025
Monitored since: June 20, 2024
12 Observations
0 Issues

St Lawrence River: School Dock

Cornwall, Ontario, Canada

Waterbody Type:
River
Last observed: September 10, 2025
Monitored since: September 10, 2025
1 Observations
0 Issues

Dollis Brook: Riverside Park (Upstream)

London, Barnet, United Kingdom

Waterbody Type:
River
Last observed: September 9, 2025
Monitored since: May 20, 2023
23 Observations
0 Issues

Dollis Brook : Outfall at RMI Site

London, England, United Kingdom

Waterbody Type:
River
Last observed: September 9, 2025
Monitored since: June 15, 2025
4 Observations
0 Issues

Folly Brook: Folly pre confluence

London, England, United Kingdom

Waterbody Type:
River
Last observed: September 9, 2025
Monitored since: February 5, 2025
8 Observations
0 Issues

Dollis Brook : Brook Farm Open Space

London, Barnet, United Kingdom

Waterbody Type:
River
Last observed: September 8, 2025
Monitored since: November 7, 2024
9 Observations
0 Issues

Mississippi Lake: Black Bass Bay

Ontario, Canada

Waterbody Type:
Lake
Last observed: September 8, 2025
Monitored since: July 29, 2024
15 Observations
0 Issues

Dollis Brook: Quinta Open Space

London, Barnet, United Kingdom

Waterbody Type:
Stream
Last observed: September 8, 2025
Monitored since: November 7, 2024
9 Observations
0 Issues

Hogsmill: S2

London, Kingston upon Thames, United Kingdom

Waterbody Type:
Stream
Last observed: September 8, 2025
Monitored since: April 1, 2025
4 Observations
0 Issues

River Brent: Brent Cross

London, Barnet, United Kingdom

Waterbody Type:
River
Last observed: September 8, 2025
Monitored since: February 18, 2025
9 Observations
0 Issues

Dollis Brook : Whetstone Stray

London, Barnet, United Kingdom

Waterbody Type:
River
Last observed: September 8, 2025
Monitored since: November 7, 2024
16 Observations
0 Issues

Upper French River : Satchel’s Bay

Ontario, Canada

Waterbody Type:
Unknown
Last observed: September 7, 2025
Monitored since: June 30, 2024
6 Observations
0 Issues

Bay of Quinte : 6.1

Ontario, Canada

Waterbody Type:
Bay
Last observed: September 6, 2025
Monitored since: August 7, 2024
3 Observations
0 Issues

Bounds Green Brook: Hobart Corner

London, Enfield, United Kingdom

Waterbody Type:
Stream
Last observed: September 5, 2025
Monitored since: July 14, 2025
3 Observations
0 Issues

Pond: Chinbrook wetlands outlet pond

London, Bromley, United Kingdom

Waterbody Type:
Wetland
Last observed: September 5, 2025
Monitored since: October 27, 2024
7 Observations
0 Issues

Pond: Chinbrook wetlands inlet pond

London, Bromley, United Kingdom

Waterbody Type:
Wetland
Last observed: September 5, 2025
Monitored since: October 27, 2024
7 Observations
0 Issues

Lagoon: Lagoon output off Peachy Street

Ontario, Canada

Waterbody Type:
Stream
Last observed: September 4, 2025
Monitored since: May 1, 2025
15 Observations
0 Issues

Lake Erie: Near Port Dover Marina

Port Dover, Ontario, Canada

Waterbody Type:
Lake
Last observed: September 2, 2025
Monitored since: July 10, 2021
20 Observations
1 Issues

Moira Lake: Kiwanis Boat Launch off Hwy 62 S of Madoc

Ontario, Canada

Waterbody Type:
Lake
Last observed: September 2, 2025
Monitored since: November 27, 2017
21 Observations
0 Issues

McGregor Bay: Hiawatha

Ontario, Canada

Waterbody Type:
Bay
Last observed: September 2, 2025
Monitored since: July 27, 2023
7 Observations
0 Issues