![](https://api.mapbox.com/styles/v1/mapbox/outdoors-v10/static/url-https%3A%2F%2Fwaterrangers.ca%2Fobservation-marker-v1.png(-76.2637,44.7065)/-76.2637,44.7065,16,0,0/380x220@2x?access_token=pk.eyJ1Ijoid2F0ZXJyYW5nZXJzIiwiYSI6ImY4Mzc4MTZkZDZkN2Y4YzFhMjA2MzQ3NDAyZjM0MjI1In0.jA6aLxZWzUm8bSBbumka4Q)
Big Rideau Lake: Big Rideau Lake in Beaver Bay
Portland, Ontario, Canada
Waterbody Type:Lake
Last observed: September 7, 2005 Monitored since: June 9, 2005
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?
+64 new sample locations added in the past 30 days
Portland, Ontario, Canada
Waterbody Type:Portland, Ontario, Canada
Waterbody Type:Ontario, Canada
Waterbody Type:Ontario, Canada
Waterbody Type:Renfrew, Ontario, Canada
Waterbody Type:Ontario, Canada
Waterbody Type:Ontario, Canada
Waterbody Type:Cranleigh, Surrey, United Kingdom
Waterbody Type:Blacknest, Surrey, United Kingdom
Waterbody Type:Cranleigh, Surrey, United Kingdom
Waterbody Type:Ripley, Surrey, United Kingdom
Waterbody Type:Weybridge, Surrey, United Kingdom
Waterbody Type:Churt, Surrey, United Kingdom
Waterbody Type:Weybridge, Surrey, United Kingdom
Waterbody Type:Cranleigh, Surrey, United Kingdom
Waterbody Type:Waverley Borough, Surrey, United Kingdom
Waterbody Type:Churt, Hampshire, United Kingdom
Waterbody Type:Churt, Hampshire, United Kingdom
Waterbody Type:Farncombe, Surrey, United Kingdom
Waterbody Type: