Yellowtail Reservoir Tpd
Big Horn County, WyomingView mapDirections
Wyoming DEQ publishes the water-quality measurements for Yellowtail Reservoir Tpd. Here is what has been measured.
- Limited data
Yellowtail Reservoir Tpd in Big Horn County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Phosphorus: 75 µg/L.
Yellowtail Reservoir Tpd is a lake in Big Horn County, Wyoming.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2015-09-28. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Yellowtail Reservoir Tpd 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 Yellowtail Reservoir Tpd
These are the measurements Wyoming DEQ publishes for Yellowtail Reservoir Tpd, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 75 µg/L. TSI 66.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 75µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| 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. | 66 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Yellowtail Reservoir Tpd
Water Quality Trend: Stable
Based on 4 years of monitoring (2014–2019).
Phosphorus
Stable-0.11 µg/L/yr4 years
Nearby Lakes in Big Horn County
Frequently asked questions about Yellowtail Reservoir Tpd
Where is Yellowtail Reservoir Tpd?
- Yellowtail Reservoir Tpd is a lake in Big Horn County, Wyoming. Its water-quality measurements are published by Wyoming DEQ and shown on this page as reported.
What is the water quality of Yellowtail Reservoir Tpd?
- Yellowtail Reservoir Tpd in Big Horn County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Phosphorus: 75 µg/L.
Is Yellowtail Reservoir Tpd safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
2 measurements from 1 monitoring station, 2015. 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_WATERSHED2 samples · 2015
Analytical methods
- Total Phosphorus After Block Digestion
Monitoring station identifiers (1)
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.