Hereford Reservoir
Laramie County, WyomingView mapDirections
Wyoming DEQ publishes the water-quality measurements for Hereford Reservoir. Here is what has been measured.
- Hypereutrophic
- Limited data
Hereford Reservoir in Laramie County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Water clarity: 3.7 ft visibility. Phosphorus: 860 µg/L.
Hereford Reservoir is a highly nutrient-loaded hypereutrophic lake in Laramie County, Wyoming. Compared to the 7 other monitored lakes in Laramie County, Hereford Reservoir ranks #8 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 Hereford 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 Hereford Reservoir
These are the measurements Wyoming DEQ publishes for Hereford 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 3.7 ft. Phosphorus 860 µg/L. TSI 80.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 3.7ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 860µg/L | Poor 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. | 80 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
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Compare lakeside cabins, hotels, and vacation rentals near Hereford Reservoir in Laramie County, Wyoming — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Hereford Reservoir are listed below.
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Nearby Lakes in Laramie County
Frequently asked questions about Hereford Reservoir
Where is Hereford Reservoir?
- Hereford Reservoir is a lake in Laramie County, Wyoming. Its water-quality measurements are published by Wyoming DEQ and shown on this page as reported.
What is the water quality of Hereford Reservoir?
- Hereford Reservoir in Laramie County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Water clarity: 3.7 ft visibility. Phosphorus: 860 µg/L.
Is Hereford Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Hereford Reservoir across LakeQuality
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Where this data comes from
16 measurements from 2 monitoring stations, 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_WATERSHED16 samples · 2019–2020
Analytical methods
- Secchi
- Total Phosphorus After Block Digestion
Monitoring station identifiers (2)
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.