Glacier County Lake Quality
Montana, 3 lakes, average grade C (Fair)
Only 3 lakes in Glacier County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. Glacier County averages to a C. The distribution behind that average matters more than the letter: a few stressed lakes versus many decent ones can produce the same average as the inverse.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Nla Lake (A); the most-stressed is Kipp Lake (F).
Quick Answers for Glacier County
Planning a trip? Check special fishing regulations for Nla Lake — or check the official Montana fishing regulations.
All Lakes in Glacier County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Nla Lake | A | 11.2 ft | 15.7 µg/L |
| 2 | Nla Lake | D | 1.6 ft | 65.7 µg/L |
| 3 | Kipp Lake | F | - | 253 µg/L |
Other Counties in Montana
See how Glacier County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 34 states.
Where to stay near Glacier County
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Source: EPA National Aquatic Resource Surveys, 2026.