/-0.030595,51.5712618,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
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
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
+40 new sample locations added in the past 30 days
Stream
Last observed: August 4, 2025 Monitored since: April 29, 2025
/-0.3145909,51.5726927,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Brook: Northwick park Brook(Wealdstone Brook?)
London, Brent, United Kingdom
Waterbody Type:River
Last observed: August 4, 2025 Monitored since: November 7, 2024
/-0.0398469,51.5761361,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Dagenham Brook: North Access Road
London, England, United Kingdom
Waterbody Type:Stream
Last observed: August 4, 2025 Monitored since: May 30, 2025
/-79.5009971,43.8486841,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Golden Forest Pond: Golden Forest Pond
Vaughan, Ontario, Canada
Waterbody Type:Pond
Last observed: August 4, 2025 Monitored since: March 30, 2025
/-76.1891209,44.8013375,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Big Rideau Lake: O’Mearas Bay
Ontario, Canada
Waterbody Type:Lake
Last observed: August 3, 2025 Monitored since: January 1, 1986
/-79.3714142,43.184864,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Lake Ontario: Grande Hermine Ship Beach
Jordan Station, Ontario, Canada
Waterbody Type:Lake
Last observed: August 3, 2025 Monitored since: October 29, 2024
/-79.3744826,43.1519465,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
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
/-1.4922095,53.8400068,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
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
/-0.1158285,51.6309914,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
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
/-0.1118628,51.633371,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
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
/-0.1163222,51.630718,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
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
/-1.4915618,53.8365397,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Roundhay Park : Waterloo Lake: Waterloo Lake East
Leeds, Leeds, United Kingdom
Waterbody Type:Lake
Last observed: August 3, 2025 Monitored since: January 24, 2025
/-76.1935058,45.0180462,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Mississippi Lake: Big lake
Ontario, Canada
Waterbody Type:Lake
Last observed: August 2, 2025 Monitored since: June 24, 2023
/-0.025711,51.55484,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
River Lea: The White House Bridge (Old River Lea)
London, Hackney, United Kingdom
Waterbody Type:River
Last observed: August 2, 2025 Monitored since: October 14, 2023
/-0.0246978,51.5585033,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Old River Lea: Point 2
London, Waltham Forest, United Kingdom
Waterbody Type:River
Last observed: August 2, 2025 Monitored since: April 6, 2024
/-1.5415192,52.2883226,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
River Leam: River Leam North Bank RLSCC
Leamington, Warwickshire, United Kingdom
Waterbody Type:River
Last observed: August 2, 2025 Monitored since: July 16, 2024
/-0.2930897,51.581518,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Wealdstone Brook: Wealdstone Brook
London, Brent, United Kingdom
Waterbody Type:Stream
Last observed: August 2, 2025 Monitored since: April 7, 2025
/-113.6004353,54.2444309,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Helliwell Lake : Helliwell Lake Bridge (RR 250)
Alberta, Canada
Waterbody Type:Lake
Last observed: August 1, 2025 Monitored since: October 6, 2023
/-70.6495352,48.2314389,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Lac à la balle : Lac à la balle
Saint Félix D'Otis, Quebec, Canada
Waterbody Type:Lake
Last observed: August 1, 2025 Monitored since: August 1, 2025
/-74.4677304,45.5890834,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Ottawa River: Ottawa River
Chute à Blondeau, Ontario, Canada
Waterbody Type:River
Last observed: August 1, 2025 Monitored since: April 13, 2019
/-0.0372548,51.561403,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Lea (Old River Lea): Friends Bridge
London, Hackney, United Kingdom
Waterbody Type:River
Last observed: August 1, 2025 Monitored since: July 31, 2021