/-79.5849609,48.1270426,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Larder Lake: Virginiatown Community Park & Boat Launch/Marina
Ontario, Canada
Waterbody Type:Lake
Last observed: August 29, 2025 Monitored since: June 9, 2018
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
+8 new sample locations added in the past 30 days
Lake
Last observed: August 29, 2025 Monitored since: June 9, 2018
/-105.7147836,52.6253786,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Salinaty Lake: Centre of Lake
Saskatchewan, Canada
Waterbody Type:Lake
Last observed: August 29, 2025 Monitored since: May 5, 2022
/-0.8427501,51.3522748,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Moulsham Bridge, Moor Green, Finchampstead: Blackwater
Wokingham, England, United Kingdom
Waterbody Type:River
Last observed: August 29, 2025 Monitored since: April 26, 2025
/-76.1710668,45.0618513,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Mississippi Lake: Mississippi Lake - by Willis Island
Ontario, Canada
Waterbody Type:Lake
Last observed: August 29, 2025 Monitored since: June 23, 2020
/-76.1731482,45.0617149,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Mississippi Lake: Sinclair Shore - Dock
Ontario, Canada
Waterbody Type:Lake
Last observed: August 29, 2025 Monitored since: June 16, 2020
/-102.3434817,50.5410606,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Round lake: End of dock
Saskatchewan, Canada
Waterbody Type:Lake
Last observed: August 29, 2025 Monitored since: June 4, 2023
/-0.5150056,51.1415019,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Cranleigh waters : Elmbridge Road bridge
Cranleigh, Surrey, United Kingdom
Waterbody Type:River
Last observed: August 29, 2025 Monitored since: January 20, 2025
/-0.5975103,51.1897264,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Landings Wood Stream: Landings Wood Stream
Farncombe, Surrey, United Kingdom
Waterbody Type:Stream
Last observed: August 29, 2025 Monitored since: July 31, 2023
/-0.5176719,51.3532904,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
The Bourne: Holme Farm
Addlestone, Surrey, United Kingdom
Waterbody Type:River
Last observed: August 29, 2025 Monitored since: February 23, 2025
/-1.4960606,53.8469571,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Great Heads Beck, Roundhay Park: Great Heads Beck 2
Leeds, Leeds, United Kingdom
Waterbody Type:Stream
Last observed: August 29, 2025 Monitored since: January 25, 2025
/-1.4906001,53.8401081,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Great Heads Beck, Roundhay Park: Great Heads Beck 3
Leeds, Leeds, United Kingdom
Waterbody Type:Unknown
Last observed: August 29, 2025 Monitored since: January 25, 2025
/-79.7037506,48.0496854,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Benson Creek: Benson Creek as it enters into Larder Lake
Ontario, Canada
Waterbody Type:Creek
Last observed: August 28, 2025 Monitored since: September 20, 2021
/-79.7174835,48.0932731,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Larder Lake : Larder Lake Marina
Ontario, Canada
Waterbody Type:Lake
Last observed: August 28, 2025 Monitored since: July 3, 2017
/-74.7814816,45.0077606,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
St Lawrence River: Power Dam Visitor Centre Bike Trail
Cornwall, Ontario, Canada
Waterbody Type:River
Last observed: August 28, 2025 Monitored since: July 10, 2025
/-74.7752516,45.0095734,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Cornwall Canal: Cornwall Canal Locks
Cornwall, Ontario, Canada
Waterbody Type:Canal
Last observed: August 28, 2025 Monitored since: July 10, 2025
/-0.2610141,51.6100837,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Burnt Oak Brook: The Meads/Deansbrook rd
Edgware, England, United Kingdom
Waterbody Type:Stream
Last observed: August 28, 2025 Monitored since: August 28, 2025
/-123.3697044,48.4633659,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Swan Creek: Blenkinsop Creek: Above Swan Lake
Esquimalt, British Columbia, Canada
Waterbody Type:Unknown
Last observed: August 28, 2025 Monitored since: November 9, 2013
/-123.3731273,48.464345,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Swan Creek: Swan Lake
Esquimalt, British Columbia, Canada
Waterbody Type:Unknown
Last observed: August 27, 2025 Monitored since: November 9, 2013
/-123.38229,48.46366,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Swan Creek: Allotment Gardens
Esquimalt, British Columbia, Canada
Waterbody Type:Creek
Last observed: August 27, 2025 Monitored since: August 7, 2013
/-123.390401,48.4660951,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Swan Creek: Swan Creek: Carey Road and McKenzie Ave
Esquimalt, British Columbia, Canada
Waterbody Type:Unknown
Last observed: August 27, 2025 Monitored since: November 9, 2013
/-123.39367,48.46512,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Swan Creek: Columbine Culvert Downstream
Esquimalt, British Columbia, Canada
Waterbody Type:Creek
Last observed: August 27, 2025 Monitored since: November 12, 2014