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?

8,239 locations

+1 new sample locations added in the past 30 days

North Branch of the Chicago River: Harms Woods/Glenview Woods

Glenview, Illinois, United States

Waterbody Type:
Unknown
Last observed: November 8, 2025
Monitored since: December 21, 2021

29 Observations

0 Issues

East Branch DuPage River: Hill Ave Bridge

Lombard, Illinois, United States

Waterbody Type:
River
Last observed: November 6, 2025
Monitored since: November 17, 2023

15 Observations

0 Issues

Hogsmill: S2

London, Kingston upon Thames, United Kingdom

Waterbody Type:
Stream
Last observed: November 3, 2025
Monitored since: April 1, 2025

6 Observations

0 Issues

Rivière des Outaouais : Pointe-Fortune

Pointe Fortune, Quebec, Canada

Waterbody Type:
River
Last observed: October 29, 2025
Monitored since: June 30, 2025

4 Observations

0 Issues

River Wey: Upper Neatham Mill

East Hampshire District, Hampshire, United Kingdom

Waterbody Type:
River
Last observed: October 27, 2025
Monitored since: October 1, 2023

22 Observations

0 Issues

Grand River: Chandos Drive Entrance

Kitchener, Ontario, Canada

Waterbody Type:
River
Last observed: October 26, 2025
Monitored since: July 22, 2025

4 Observations

0 Issues

Beaver Creek: Beaver Creek at College Road

Niagara Falls, Ontario, Canada

Waterbody Type:
Creek
Last observed: October 26, 2025
Monitored since: December 29, 2024

9 Observations

0 Issues

Black Creek: Black Creek bridge at College Road (Upstream)

Ontario, Canada

Waterbody Type:
Creek
Last observed: October 26, 2025
Monitored since: October 29, 2024

12 Observations

0 Issues

Pond: Carville Mill Park

Vaughan, Ontario, Canada

Waterbody Type:
Pond
Last observed: October 26, 2025
Monitored since: October 27, 2024

7 Observations

0 Issues

Mill Pond: Mill Pond

Richmond Hill, Ontario, Canada

Waterbody Type:
Pond
Last observed: October 26, 2025
Monitored since: October 27, 2024

7 Observations

0 Issues

Creek: Beaver Creek

Richmond Hill, Ontario, Canada

Waterbody Type:
Creek
Last observed: October 26, 2025
Monitored since: October 27, 2024

7 Observations

0 Issues

Pearl River: West Spillway Dock

Brandon, Mississippi, United States

Waterbody Type:
River
Last observed: October 26, 2025
Monitored since: April 20, 2024

19 Observations

0 Issues

Round lake: Shore

Stockholm, Saskatchewan, Canada

Waterbody Type:
Lake
Last observed: October 25, 2025
Monitored since: October 25, 2025

1 Observations

0 Issues

River Wey: The Haren Garden, Farnham

Farnham, Surrey, United Kingdom

Waterbody Type:
River
Last observed: October 25, 2025
Monitored since: May 31, 2022

11 Observations

0 Issues

River Wey: Brigadier’s Bench

Frensham, Surrey, United Kingdom

Waterbody Type:
Unknown
Last observed: October 25, 2025
Monitored since: July 31, 2022

26 Observations

0 Issues