Flaming Gorge Reservoir
Sweetwater County, WyomingView mapDirections
Not Rated: one monitoring station are on record, but they measured water clarity only. LakeQuality’s A–F method grades total phosphorus, total nitrogen, chlorophyll-a, and turbidity; clarity is shown, not scored.
- Limited data
Flaming Gorge Reservoir in Sweetwater County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 11.8 ft visibility.
- Clarity
- 11.8 ft
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Watch Flaming Gorge Reservoir’s letter
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Why Flaming Gorge Reservoir has no grade
Flaming Gorge Reservoir has monitoring on record from one station, but only water clarity was measured. LakeQuality’s A–F letter uses total phosphorus, total nitrogen, chlorophyll-a, and turbidity against EPA National Lakes Assessment condition classes. With none of those grading measurements on record, Flaming Gorge Reservoir is Not Rated — not an F. Its 11.8-foot median from 1 readings collected 2019 is still shown as clarity, but clarity alone cannot earn a letter.
Not Rated is EPA Integrated Reporting Category 3 — insufficient information. Everything below that has been measured is still reported on this page.
Sampling is run by Wyoming DEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Flaming Gorge Reservoir is a lake in Sweetwater County, Wyoming.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2019-08-13. Grade methodology: LakeQuality methodology.
What Flaming Gorge Reservoir is good for
From access and monitoring records, not editorial picks.
- Clear water11.8 ft of visibility
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Flaming Gorge Reservoir
These readings exist but are not enough for an A–F grade — see why.
Good clarity, visible to about 11.8 ft. TSI 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11.8 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Fishing Flaming Gorge Reservoir
Nearby Lakes in Sweetwater County
Frequently asked questions about Flaming Gorge Reservoir
Where is Flaming Gorge Reservoir?
- Flaming Gorge Reservoir is a lake in Sweetwater County, Wyoming. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Flaming Gorge Reservoir?
- Flaming Gorge Reservoir in Sweetwater County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 11.8 ft visibility.
Is Flaming Gorge Reservoir safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Flaming Gorge Reservoir across LakeQuality
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Where this data comes from
1 measurement from 1 monitoring station, 2019. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Utah Department Of Environmental Quality
UTAHDWQ_WQX1 sample · 2019
Analytical methods
- Field Measurements
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.