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?

8,238 locations

+8 new sample locations added in the past 30 days

Pearl River: Rosemary Rd bridge

Terry, Mississippi, United States

Waterbody Type:
River
Last observed: August 4, 2025
Monitored since: June 13, 2024
8 Observations
0 Issues

Rouge River: Rouge River

Quebec, Canada

Waterbody Type:
River
Last observed: August 4, 2025
Monitored since: July 27, 2024
13 Observations
0 Issues

Lac Clair: Fosse Sud CL2

Val-des-Monts, Quebec, Canada

Waterbody Type:
Lake
Last observed: August 4, 2025
Monitored since: May 30, 2021
24 Observations
0 Issues

Lac Clair: Fosse Nord CL1

Val-des-Monts, Quebec, Canada

Waterbody Type:
Lake
Last observed: August 4, 2025
Monitored since: May 30, 2021
25 Observations
0 Issues

Lac Saint-Germain: Fosse SG3

Val-des-Monts, Quebec, Canada

Waterbody Type:
Lake
Last observed: August 4, 2025
Monitored since: May 30, 2021
18 Observations
0 Issues

Lac Saint-Germain: Fosse SG2

Val-des-Monts, Quebec, Canada

Waterbody Type:
Lake
Last observed: August 4, 2025
Monitored since: May 30, 2021
20 Observations
0 Issues

Lac Saint-Germain: Fosse SG1

Val-des-Monts, Quebec, Canada

Waterbody Type:
Lake
Last observed: August 4, 2025
Monitored since: May 30, 2021
20 Observations
0 Issues

Basingstoke Canal: Chobham Road underpass

Woking, Surrey, United Kingdom

Waterbody Type:
Canal
Last observed: August 4, 2025
Monitored since: August 3, 2023
17 Observations
0 Issues

Dagenham Brook : Dagenham Brook Bridge Rd U/S

London, Waltham Forest, United Kingdom

Waterbody Type:
Stream
Last observed: August 4, 2025
Monitored since: April 29, 2025
2 Observations
0 Issues

Brook: Northwick park Brook(Wealdstone Brook?)

London, Brent, United Kingdom

Waterbody Type:
River
Last observed: August 4, 2025
Monitored since: November 7, 2024
5 Observations
0 Issues

Dagenham Brook: North Access Road

London, England, United Kingdom

Waterbody Type:
Stream
Last observed: August 4, 2025
Monitored since: May 30, 2025
3 Observations
0 Issues

Golden Forest Pond: Golden Forest Pond

Vaughan, Ontario, Canada

Waterbody Type:
Pond
Last observed: August 4, 2025
Monitored since: March 30, 2025
4 Observations
0 Issues

Big Rideau Lake: O’Mearas Bay

Ontario, Canada

Waterbody Type:
Lake
Last observed: August 3, 2025
Monitored since: January 1, 1986
88 Observations
0 Issues

Lake Ontario: Grande Hermine Ship Beach

Jordan Station, Ontario, Canada

Waterbody Type:
Lake
Last observed: August 3, 2025
Monitored since: October 29, 2024
8 Observations
0 Issues

Twenty Mile Creek: Twenty Mile Creek at Twenty-First Street

Jordan, Ontario, Canada

Waterbody Type:
Creek
Last observed: August 3, 2025
Monitored since: October 29, 2024
9 Observations
0 Issues

Roundhay Park : Waterloo Lake: Waterloo Lake: NW Corner

Leeds, Leeds, United Kingdom

Waterbody Type:
Lake
Last observed: August 3, 2025
Monitored since: January 24, 2025
8 Observations
0 Issues

Salmons Brook/Houndsden Gutter/Grovelands Stream: Grovelands Park Lake Downstream of reedbeds

London, Enfield, United Kingdom

Waterbody Type:
Unknown
Last observed: August 3, 2025
Monitored since: August 12, 2024
36 Observations
0 Issues

Salmons Brook/Houndsden Gutter/Grovelands Stream: Grovelands Park Stream below dam

London, Enfield, United Kingdom

Waterbody Type:
Stream
Last observed: August 3, 2025
Monitored since: July 30, 2023
73 Observations
0 Issues

Salmons Brook/Houndsden Gutter/Grovelands Stream: Grovelands Park Lake Entry

London, Enfield, United Kingdom

Waterbody Type:
Stream
Last observed: August 3, 2025
Monitored since: April 23, 2023
96 Observations
0 Issues

Roundhay Park : Waterloo Lake: Waterloo Lake East

Leeds, Leeds, United Kingdom

Waterbody Type:
Lake
Last observed: August 3, 2025
Monitored since: January 24, 2025
8 Observations
0 Issues

Mississippi Lake: Big lake

Ontario, Canada

Waterbody Type:
Lake
Last observed: August 2, 2025
Monitored since: June 24, 2023
12 Observations
0 Issues