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

+7 new sample locations added in the past 30 days

Lake Sehoy: MPI Lake Training

Hattiesburg, Mississippi, United States

Waterbody Type:
Lake
Last observed: April 11, 2025
Monitored since: April 11, 2025

St Lawrence River: St Lawrence River

Ontario, Canada

Waterbody Type:
Unknown
Last observed: April 10, 2025
Monitored since: April 10, 2025

West Pearl: Hwy 59

Pearl River, Louisiana, United States

Waterbody Type:
River
Last observed: April 9, 2025
Monitored since: May 2, 2021

Rivière Richelieu: Centre-de-Plein-air-Ronald-Beauregard

Montreal, Quebec, Canada

Waterbody Type:
River
Last observed: April 9, 2025
Monitored since: July 26, 2024

Bay of Quinte: Bay of Quinte Aikins Rd.

Rednersville, Ontario, Canada

Waterbody Type:
Unknown
Last observed: April 8, 2025
Monitored since: April 17, 2023

Glen Abbey Golf Course Stream 1: Glen Abbey Golf Course Stream 1

Oakville, Ontario, Canada

Waterbody Type:
Stream
Last observed: April 7, 2025
Monitored since: April 7, 2025

North Branch Chicago River at Eugene Field Park Footbridge: Eugene Field Park

Chicago, Illinois, United States

Waterbody Type:
River
Last observed: April 6, 2025
Monitored since: December 15, 2024

Spring Brook Creek: Spring Brook Creek

Wheaton, Illinois, United States

Waterbody Type:
Creek
Last observed: April 6, 2025
Monitored since: December 8, 2024

Lake Ontario: Little Bluff Conservation Area

Ontario, Canada

Waterbody Type:
Lake
Last observed: April 6, 2025
Monitored since: April 16, 2017

Gartside Creek: Gartside Creek at Queen of Peace

Belleville, Illinois, United States

Waterbody Type:
Creek
Last observed: April 5, 2025
Monitored since: October 21, 2023

Moore Brook : Firs Farm Wetlands - Outlet

London, Enfield, United Kingdom

Waterbody Type:
Wetland
Last observed: April 5, 2025
Monitored since: April 5, 2025

Richland Creek: Richland Creek @ South Side City Park

Belleville, Illinois, United States

Waterbody Type:
Creek
Last observed: April 3, 2025
Monitored since: February 9, 2023

Bayside Quarry east Pond: Bayside Quarry east Pond

Rednersville, Ontario, Canada

Waterbody Type:
Pond
Last observed: April 3, 2025
Monitored since: April 6, 2022

Chicago River: River Park Boathouse

Chicago, Illinois, United States

Waterbody Type:
River
Last observed: April 3, 2025
Monitored since: January 2, 2023

Burnt Oak Brook: Lyndhurst Park (downstream of culvert)

London, Barnet, United Kingdom

Waterbody Type:
Stream
Last observed: April 3, 2025
Monitored since: February 2, 2024

Burnt Oak Brook: Simmonds Mead Open Space

London, Barnet, United Kingdom

Waterbody Type:
Stream
Last observed: April 3, 2025
Monitored since: February 1, 2024

Pond at Creek Bend Nature Center: Creek Bend Pond

Saint Charles, Illinois, United States

Waterbody Type:
Pond
Last observed: April 3, 2025
Monitored since: November 7, 2023

Schoenberger Creek: Schoenberger Creek at West Belleville Bikeway

Belleville, Illinois, United States

Waterbody Type:
Creek
Last observed: April 1, 2025
Monitored since: October 23, 2023

Hogsmill: Saipem S2- Middle Mill

London, Kingston upon Thames, United Kingdom

Waterbody Type:
River
Last observed: April 1, 2025
Monitored since: April 1, 2025

Lake Oakton : Oakton College

Des Plaines, Illinois, United States

Waterbody Type:
Pond
Last observed: March 31, 2025
Monitored since: January 29, 2025

Big Hollow Creek: Big Hollow Creek in Iris Park

Peoria, Illinois, United States

Waterbody Type:
Creek
Last observed: March 31, 2025
Monitored since: December 23, 2023