Broadwater County Lake Quality
Montana, 2 lakes, measured by Montana DEQ
Broadwater County holds 2 monitored lakes. With a sample that small the county-level summary describes those specific waters, not necessarily every water body in the county. 1 of those lake carry recent nutrient and algae readings. The county-level summary describes that subset, not every water body listed. For Broadwater County the spread behind the average matters more than the average itself: a few nutrient-rich lakes among many clear ones produce the same figure as the inverse.
The county's lakes lean shallow, which makes the readings sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest measured lake is Canyon Ferry Lake.
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Quick Answers for Broadwater County
Planning a trip? Check special fishing regulations for Canyon Ferry Lake — or check the official Montana fishing regulations.
All Lakes in Broadwater County
2 lakes · 1 ranked on readings, 1 without enough sampling1 lake ranked on readings · 1 without enough sampling, hidden
| # | Lake | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|
| 1 | Canyon Ferry LakeBroadwater | 8.9 ft | 34 µg/L | No recent samples | No recent samples | ✓ Public |
| Island Park ReservoirBroadwater | No recent samples | 23.5 µg/L | 6.3 µg/L | 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 Montana Department of Environmental Quality. See data sources.