Upper New Fork Lake
Sublette County, WyomingView mapDirections
Wyoming DEQ publishes the water-quality measurements for Upper New Fork Lake. Here is what has been measured.
- Mesotrophic
- Limited data
Upper New Fork Lake in Sublette County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Water clarity: 10.5 ft visibility. Phosphorus: 10 µg/L.
Upper New Fork Lake is a mesotrophic lake in Sublette County, Wyoming. Compared to the 7 other monitored lakes in Sublette County, Upper New Fork Lake ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2019-09-09. Methodology: how these readings are compared.
What Upper New Fork Lake is good for
From access and monitoring records, not editorial picks.
- Clear water10.5 ft of visibility
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Upper New Fork 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 Upper New Fork Lake
These are the measurements Wyoming DEQ publishes for Upper New Fork Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 10.5 ft. Phosphorus 10 µg/L. TSI 40.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 10.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 10µg/L | Good GoodFairPoor |
| 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. | 40 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
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Fishing Upper New Fork Lake
Nearby Lakes in Sublette County
Frequently asked questions about Upper New Fork Lake
Where is Upper New Fork Lake?
- Upper New Fork Lake is a lake in Sublette County, Wyoming. Its water-quality measurements are published by Wyoming DEQ and shown on this page as reported.
What is the water quality of Upper New Fork Lake?
- Upper New Fork Lake in Sublette County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Water clarity: 10.5 ft visibility. Phosphorus: 10 µg/L.
Is Upper New Fork Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Upper New Fork Lake across LakeQuality
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Other Lakes in Wyoming
Mesotrophic Lakes in Wyoming
Where this data comes from
12 measurements from 2 monitoring stations, 2019. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- State of Wyoming Department of Environmental Quality Watershed Program
WYDEQ_WATERSHED12 samples · 2019
Analytical methods
- Secchi
- Total Phosphorus After Block Digestion
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.