Lanark County Lake Quality
Ontario, 29 lakes, measured by Ontario MECP
The county-level average smooths over real differences — a single agricultural watershed near the southwest corner can pull the average down even if the rest of the county runs clean. The 29 monitored lakes in Lanark County carry whatever clarity, phosphorus, and chlorophyll-a readings Ontario MECP has published, shown as reported.
Most of the county's monitored lakes are shallow, under 50 feet, which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed.
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Quick Answers for Lanark County
Planning a trip? Check special fishing regulations for Adam'S Lake — or check the official Ontario fishing regulations.
All Lakes in Lanark County
29 lakes · 0 ranked on readings, 29 without enough sampling0 lakes ranked on readings · 29 without enough sampling, hidden
| # | Lake | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|
| Adam'S LakeLanark | 14.1 ft | 13.2 µg/L | No recent samples | No recent samples | Not recorded | |
| Bennett LakeLanark | 11.5 ft | 9.3 µg/L | No recent samples | No recent samples | Not recorded | |
| Black LakeLanark | 15.1 ft | No recent samples | No recent samples | No recent samples | Not recorded | |
| Bowley LakeLanark | 4.4 ft | 27.5 µg/L | No recent samples | No recent samples | Not recorded | |
| Christie LakeLanark | 15.1 ft | 9.5 µg/L | No recent samples | No recent samples | Not recorded | |
| Davern LakeLanark | 17.1 ft | 7.8 µg/L | No recent samples | No recent samples | Not recorded | |
| Farren LakeLanark | 19 ft | 10.5 µg/L | No recent samples | No recent samples | Not recorded | |
| Flower Round LakeLanark | 19.7 ft | No recent samples | No recent samples | No recent samples | Not recorded | |
| Izatt LakeLanark | 10.2 ft | 13.6 µg/L | No recent samples | No recent samples | Not recorded | |
| Little Silver LakeLanark | 14.8 ft | 8.3 µg/L | No recent samples | No recent samples | Not recorded | |
| Long LakeLanark | 13.5 ft | 8.8 µg/L | No recent samples | No recent samples | Not recorded | |
| Lower Rideau LakeLanark | 14.8 ft | 16.4 µg/L | No recent samples | No recent samples | Not recorded | |
| Mclaren LakeLanark | 10.2 ft | 16.1 µg/L | No recent samples | No recent samples | Not recorded | |
| Mississippi LakeLanark | 11.2 ft | 12.5 µg/L | No recent samples | No recent samples | Not recorded | |
| Murray LakeLanark | 7.9 ft | 8.6 µg/L | No recent samples | No recent samples | Not recorded | |
| Obrien LakeLanark | 16.2 ft | 8.8 µg/L | No recent samples | No recent samples | Not recorded | |
| Otty LakeLanark | 16.4 ft | 13.3 µg/L | No recent samples | No recent samples | Not recorded | |
| Patterson LakeLanark | 17.4 ft | 9.9 µg/L | No recent samples | No recent samples | Not recorded | |
| Pike LakeLanark | 15.4 ft | 11.1 µg/L | No recent samples | No recent samples | Not recorded | |
| Rainbow LakeLanark | 9.2 ft | 13.8 µg/L | No recent samples | No recent samples | Not recorded | |
| Robert'S LakeLanark | 15.3 ft | 9 µg/L | No recent samples | No recent samples | Not recorded | |
| Robertson LakeLanark | 27.9 ft | 10.8 µg/L | No recent samples | No recent samples | Not recorded | |
| Rock LakeLanark | 11.5 ft | 8.4 µg/L | No recent samples | No recent samples | Not recorded | |
| Round LakeLanark | 12 ft | 10 µg/L | No recent samples | No recent samples | Not recorded | |
| White LakeLanark | 10.5 ft | 10.4 µg/L | No recent samples | No recent samples | Not recorded | |
| Dalhousie LakeLanark | 11.2 ft | 9.2 µg/L | No recent samples | No recent samples | Not recorded | |
| Mann LakeLanark | No recent samples | 16.4 µg/L | No recent samples | No recent samples | Not recorded | |
| Upper Park LakeLanark | No recent samples | 10.4 µg/L | No recent samples | No recent samples | Not recorded | |
| Farrell LakeLanark | 20.7 ft | 7.9 µg/L | No recent samples | No recent samples | Not recorded |
NR = no nutrient or algae reading on record. The measurements are published as the authority reports them. Where the data comes from.
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Source: the Ontario Ministry of the Environment, Conservation and Parks. See data sources.