Flaming Gorge-Green River Off Firehole Canyon Campground Lake
Sweetwater County, WyomingView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Limited data
Flaming Gorge-Green River Off Firehole Canyon Campground Lake in Sweetwater County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 4.4 ft visibility. Chlorophyll-a (algae): 1.6 µg/L.
- Clarity
- 4.4 ft
- Chlorophyll-a
- 1.6 µg/L
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Watch Flaming Gorge-Green River Off Firehole Canyon Campground Lake’s letter
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Why Flaming Gorge-Green River Off Firehole Canyon Campground Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Flaming Gorge-Green River Off Firehole Canyon Campground Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity and algae (chlorophyll-a), but not phosphorus.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. 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-Green River Off Firehole Canyon Campground Lake is a lake in Sweetwater County, Wyoming.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2016-07-05. Grade methodology: LakeQuality methodology.
What Flaming Gorge-Green River Off Firehole Canyon Campground Lake is good for
From access and monitoring records, not editorial picks.
- Camping1 public campground nearby
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
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Water quality measurements for Flaming Gorge-Green River Off Firehole Canyon Campground Lake
These readings exist but are not enough for an A–F grade — see why.
Murky, only visible to about 4.4 ft. Chlorophyll-a 1.6 µg/L. TSI 45.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.4 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 1.6 µg/L | Not graded |
| Trophic State Index (TSI) | 45 | Mesotrophic |
Moderate nutrients, good water quality
Recreation & Access
Public campgrounds near Flaming Gorge-Green River Off Firehole Canyon Campground Lake
- Firehole0.6 km
Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes
Fishing Flaming Gorge-Green River Off Firehole Canyon Campground Lake
Nearby Lakes in Sweetwater County
Frequently asked questions about Flaming Gorge-Green River Off Firehole Canyon Campground Lake
Where is Flaming Gorge-Green River Off Firehole Canyon Campground Lake?
- Flaming Gorge-Green River Off Firehole Canyon Campground Lake 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-Green River Off Firehole Canyon Campground Lake?
- Flaming Gorge-Green River Off Firehole Canyon Campground Lake in Sweetwater County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 4.4 ft visibility. Chlorophyll-a (algae): 1.6 µg/L.
Is Flaming Gorge-Green River Off Firehole Canyon Campground Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Are there campgrounds on Flaming Gorge-Green River Off Firehole Canyon Campground Lake?
- Flaming Gorge-Green River Off Firehole Canyon Campground Lake has 1 public campground from USGS The National Map within 5 km, including Firehole. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.
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Where this data comes from
4 measurements from 1 monitoring station, 2013–2016. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- UC Region of USBOR
UC_REGION_USBOR_WQX4 samples · 2013–2016
Analytical methods
- Standard Methods for the Examination of Water and Wastewater
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.
Other records on this page
Public campgrounds from USGS The National Map Structures, within about 3 miles