Yellowstone Lake
Teton County, WyomingView mapDirections
Wyoming DEQ publishes the water-quality measurements for Yellowstone Lake. Here is what has been measured.
- Limited data
Yellowstone Lake in Teton County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Water clarity: 28.7 ft visibility.
Yellowstone Lake is a lake in Teton County, Wyoming.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2013-09-09. Methodology: how these readings are compared.
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What Yellowstone Lake is good for
From access and monitoring records, not editorial picks.
- Clear water28.7 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Yellowstone Lake is safe to swim in today is a call for the Wyoming Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Yellowstone Lake
These are the measurements Wyoming DEQ publishes for Yellowstone 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 28.7 ft down. TSI 29.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 28.7ft | 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.
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Answers come straight from the public measurements and survey records on this page.
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Fishing Yellowstone Lake
Nearby Lakes in Teton County
Frequently asked questions about Yellowstone Lake
Where is Yellowstone Lake?
- Yellowstone Lake is a lake in Teton County, Wyoming. Its water-quality measurements are published by Wyoming DEQ and shown on this page as reported.
What is the water quality of Yellowstone Lake?
- Yellowstone Lake in Teton County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Water clarity: 28.7 ft visibility.
Is Yellowstone Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Yellowstone Lake across LakeQuality
3 documented falls within 21.2 mi, nearest Lewis Falls
4 thermal springs within 10.8 mi, nearest Steamboat Springs
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Where this data comes from
14 measurements from 2 monitoring stations, 2012–2013. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- National Park Service Water Resources Division
11NPSWRD_WQX14 samples · 2012–2013
Monitoring station identifiers (2)
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.