Jordan Reservoir
Platte County, WyomingView mapDirections
Wyoming DEQ publishes the water-quality measurements for Jordan Reservoir. Here is what has been measured.
- Mesotrophic
- Limited data
Jordan Reservoir in Platte County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Water clarity: 5 ft visibility. Phosphorus: 10 µg/L.
Jordan Reservoir is a mesotrophic lake in Platte County, Wyoming. Overall water quality is improving over recent sampling years. Compared to the 8 other monitored lakes in Platte County, Jordan Reservoir ranks #7 for water quality.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2020-09-15. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Jordan Reservoir 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 Jordan Reservoir
These are the measurements Wyoming DEQ publishes for Jordan Reservoir, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 5 ft. Phosphorus 10 µg/L. TSI 46.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 10µg/L | Good GoodFairPoor |
| 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. | 46 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
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Fishing Jordan Reservoir
Water quality readings over time
2 seasons of samples on record (2019–2020). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Improving2 years
Phosphorus
Stable0 µg/L/yr2 years
Nearby Lakes in Platte County
Frequently asked questions about Jordan Reservoir
Where is Jordan Reservoir?
- Jordan Reservoir is a lake in Platte County, Wyoming. Its water-quality measurements are published by Wyoming DEQ and shown on this page as reported.
What is the water quality of Jordan Reservoir?
- Jordan Reservoir in Platte County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Water clarity: 5 ft visibility. Phosphorus: 10 µg/L.
Is Jordan Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Jordan Reservoir across LakeQuality
More lakes in Wyoming
Other Lakes in Wyoming
Mesotrophic Lakes in Wyoming
Where this data comes from
12 measurements from 1 monitoring station, 2019–2020. 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_WATERSHED12 samples · 2019–2020
Analytical methods
- Secchi
- 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.