Jette Lake
Lake County, MontanaView mapDirections
Montana DEQ publishes the water-quality measurements for Jette Lake. Here is what has been measured.
- Limited data
Jette Lake in Lake County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Water clarity: 15.8 ft visibility.
Jette Lake is a lake in Lake County, Montana. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, Montana DEQ, last sampled 2021-07-19. Methodology: how these readings are compared.
What Jette Lake is good for
From access and monitoring records, not editorial picks.
- Clear water15.8 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Jette Lake 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 Jette Lake
These are the measurements Montana DEQ publishes for Jette Lake, 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 15.8 ft down. TSI 37.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 15.8ft | 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. | 37 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
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Answers come straight from the public measurements and survey records on this page.
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Stays near Jette Lake
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Fishing Jette Lake
Water Quality Trend: Improving
Based on 12 years of monitoring (2012–2023).
Water clarity
Worsening2 years
Phosphorus
Improving-1.48 µg/L/yr11 years
Chlorophyll-a
Improving-0.45 µg/L/yr12 years
Nearby Lakes in Lake County
Frequently asked questions about Jette Lake
Where is Jette Lake?
- Jette Lake is a lake in Lake County, Montana. Its water-quality measurements are published by Montana DEQ and shown on this page as reported.
What is the water quality of Jette Lake?
- Jette Lake in Lake County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Water clarity: 15.8 ft visibility.
Is Jette Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Jette Lake across LakeQuality
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Where this data comes from
2 measurements from 1 monitoring station, 2020–2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North American Lake Management Society
NALMS2 samples · 2020–2021
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.