Clearwater Lake Deep
Missoula County, MontanaView mapDirections
Montana DEQ publishes the water-quality measurements for Clearwater Lake Deep. Here is what has been measured.
- Limited data
Clearwater Lake Deep in Missoula County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Water clarity: 28.6 ft visibility.
Clearwater Lake Deep is a lake in Missoula County, Montana.
Source: EPA Water Quality Portal sampling records, Montana DEQ, last sampled 2019-08-28. Methodology: how these readings are compared.
What Clearwater Lake Deep is good for
From access and monitoring records, not editorial picks.
- Clear water28.6 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Clearwater Lake Deep is safe to swim in today is a call for the Montana Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Clearwater Lake Deep
These are the measurements Montana DEQ publishes for Clearwater Lake Deep, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 28.6 ft down. TSI 29.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 28.6ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 29 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Clearwater Lake Deep
Answers come straight from the public measurements and survey records on this page.
Lake Size & Watershed
Watershed (drainage) area
3 sq mi
HydroLAKES / HydroSHEDS
Surface area
89 acres
HydroLAKES / HydroSHEDS
Shoreline
1.6 mi
HydroLAKES / HydroSHEDS
Elevation
4,793 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Stays via Stay22
Stays near Clearwater Lake Deep
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Top-rated places to stay near Clearwater Lake Deep
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Fishing Clearwater Lake Deep
Water Quality Trend: Stable
Based on 7 years of monitoring (2013–2019).
Water clarity
Stable7 years
Nearby Lakes in Missoula County
Frequently asked questions about Clearwater Lake Deep
Where is Clearwater Lake Deep?
- Clearwater Lake Deep is a lake in Missoula County, Montana. Its water-quality measurements are published by Montana DEQ and shown on this page as reported.
What is the water quality of Clearwater Lake Deep?
- Clearwater Lake Deep in Missoula County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Water clarity: 28.6 ft visibility.
Is Clearwater Lake Deep safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Clearwater Lake Deep?
- The available depth estimate for Clearwater Lake Deep is shallower than its measured water clarity, which cannot be right, so no depth is shown.
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Where this data comes from
51 measurements from 1 monitoring station, 2013–2019. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Montana Volunteer Water Quality Monitoring
MTVOLWQM_WQX51 samples · 2013–2019
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)