How are these rankings calculated?

Nutrients and algae, total phosphorus, nitrogen, chlorophyll-a and turbidity, are read against EPA National Lakes Assessment 2022 condition classes for that lake’s ecoregion. Water clarity (Secchi depth) is measured and shown; it is not the letter. Lakes without enough recent samples are UNRATED, not given an F. Source data comes from the EPA Water Quality Portal.

Cleanest Lakes in Unorganized Division No. 1 County, Ontario

There is not yet enough monitoring data for Unorganized Division No. 1 County, Ontario.

More Answers for Unorganized Division No. 1 County, Ontario