Seminoe Reservoir Transitional Pelagic
Carbon County, WyomingView mapDirections
Clarity, phosphorus, and algae sit in the clean band for this region.
- Mesotrophic
- #4 of 10 in the county
- Limited data
Seminoe Reservoir Transitional Pelagic in Carbon County, Wyoming has a water quality grade of B (Good). Water clarity: 11.4 ft visibility. Phosphorus: 20 µg/L.
- Clarity
- 11.4 ft
- Type
- Mesotrophic
- Phosphorus
- 20 µg/L
- Trend
- ↓ Declining
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Watch Seminoe Reservoir Transitional Pelagic’s letter
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Seminoe Reservoir Transitional Pelagic is a mesotrophic lake in Carbon County, Wyoming. Water quality is graded B based on 1 sampling years through 2016. Overall water quality is declining over recent sampling years. Compared to the 9 other monitored lakes in Carbon County, Seminoe Reservoir Transitional Pelagic ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2016-09-12. Grade methodology: LakeQuality methodology.
What Seminoe Reservoir Transitional Pelagic is good for
From access and monitoring records, not editorial picks.
- Clear water11.4 ft of visibility
Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: B (Good)
Good clarity, visible to about 11.4 ft. Phosphorus 20 µg/L. TSI 45. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11.4 ft | Not graded |
| Phosphorus | 20 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 45 | Mesotrophic |
Moderate nutrients, good water quality
Fishing Seminoe Reservoir Transitional Pelagic
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 |
County Ranking
Ranked #4 of 10 lakes in Carbon County
Nearby Lakes in Carbon County
Frequently asked questions about Seminoe Reservoir Transitional Pelagic
Where is Seminoe Reservoir Transitional Pelagic?
- Seminoe Reservoir Transitional Pelagic is a lake in Carbon County, Wyoming. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Seminoe Reservoir Transitional Pelagic?
- Seminoe Reservoir Transitional Pelagic in Carbon County, Wyoming has a water quality grade of B (Good). Water clarity: 11.4 ft visibility. Phosphorus: 20 µg/L.
Is Seminoe Reservoir Transitional Pelagic safe to swim in?
- The B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Explore Seminoe Reservoir Transitional Pelagic across LakeQuality
More Wyoming Lake Rankings
Other Grade B Lakes in Wyoming
Mesotrophic Lakes in Wyoming
Where this data comes from
17 measurements from 1 monitoring station, 2012–2016. 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_WATERSHED17 samples · 2012–2016
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.