Seminoe Reservoir Transitional Littoral
Carbon 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
Seminoe Reservoir Transitional Littoral in Carbon County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 7.1 ft visibility. Phosphorus: 10 µg/L.
- Clarity
- 7.1 ft
- Phosphorus
- 10 µg/L
- Trend
- ↓ Declining
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Watch Seminoe Reservoir Transitional Littoral’s letter
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Why Seminoe Reservoir Transitional Littoral 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 Seminoe Reservoir Transitional Littoral, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity and phosphorus, but not algae (chlorophyll-a).
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.
Seminoe Reservoir Transitional Littoral is a lake in Carbon County, Wyoming. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2013-07-08. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Seminoe Reservoir Transitional Littoral
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 7.1 ft. Phosphorus 10 µg/L. TSI 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7.1 ft | Not graded |
| Phosphorus | 10 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Fishing Seminoe Reservoir Transitional Littoral
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↓ Declining | +1.5 µg/L/yr | 5 |
Graded lakes near Seminoe Reservoir Transitional Littoral
Seminoe Reservoir Transitional Littoral has no grade, but these lakes within a short drive do.
Nearby Lakes in Carbon County
Frequently asked questions about Seminoe Reservoir Transitional Littoral
Where is Seminoe Reservoir Transitional Littoral?
- Seminoe Reservoir Transitional Littoral is a lake in Carbon 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 Seminoe Reservoir Transitional Littoral?
- Seminoe Reservoir Transitional Littoral in Carbon County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 7.1 ft visibility. Phosphorus: 10 µg/L.
Is Seminoe Reservoir Transitional Littoral safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
3 measurements from 1 monitoring station, 2012–2013. 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_WATERSHED3 samples · 2012–2013
Analytical methods
- Secchi
- Total Phosphorus After Block Digestion
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.