Spring Phosphorus Results
The 2017 spring phosphorus value for Onwatin Lake is 6.7 µg/L. The average total spring phosphorus for Onwatin Lake since 2001 is 7.67 µg/L which is well below the Provincial Water Quality Objective of 20.0 µg/L and indicates that this lake is likely oligotrophic.
For more detailed information, download the graph illustrating the spring phosphorus levels in Onwatin Lake from 2001-2017 (PDF 11 KB).
Shoreline Classification Project
View your lake's shoreline classification (PDF 580 KB).
What colour is your shoreline?
Onwatin Lake has 159 permanent residents and 13 seasonal/recreational residents.
Location & Lake Characteristics
Onwatin Lake is located in Hanmer and Capreol townships, near the town of Hanmer. Onwatin Lake has an area of 34.2 hectares and a shoreline perimetre of 5.4 kilometres. The maximum depth is 4 metres. Onwatin Lake is actually a widening of the Vermilion River. View maps of Onwatin Lake.
Onwatin is located in the Upper Vermilion Watershed. For more information on the watershed, visit the following link: Watershed Map.
For information regarding the Onwatin Lake Stewardship Committee visit the Lake Stewardship link.
For more information on the different fish species found in Greater Sudbury lakes follow the fish link.
For more information about macro invertebrates (aquatic insects), visit the Aquatic Insects Information section of our website.
There is currently no data for aquatic plants.