Hauser Lake is a mesotrophic lake in Lewis and Clark County, Montana. Water quality is graded C based on 1 sampling years through 2026. Compared to the 11 other monitored lakes in Lewis and Clark County, Hauser Lake ranks #10 for water quality.
Source: EPA Water Quality Portal sampling records, Montana DNR, last sampled 2026-06-16. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Moderate clarity, visible to about 8.7 ft. Trophic State Index: 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8.7 ft | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Hauser Lake
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Fishing Hauser Lake
Location
County Ranking
Ranked #10 of 12 lakes in Lewis and Clark County
Cleaner Lakes Within 30 Miles
Hauser Lake holds Grade C. One nearby lake has a higher grade.
Nearby Lakes in Lewis and Clark County
Explore Hauser Lake across LakeGrade
More Montana Lake Rankings
Other Grade C Lakes in Montana
Mesotrophic Lakes in Montana
More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2026-06-16
Monitoring stations: 1