Hereford Reservoir
Laramie County, WyomingView mapDirections
Nutrients and algae run above the regional average.
- Hypereutrophic
- #8 of 8 in the county
- Limited data
Hereford Reservoir in Laramie County, Wyoming has a water quality grade of D (Nutrient-rich). Water clarity: 3.7 ft visibility. Phosphorus: 860 µg/L.
- Clarity
- 3.7 ft
- Type
- Hypereutrophic
- Phosphorus
- 860 µg/L
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Stays near Hereford Reservoir
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 grade measures nutrients and algae, not lodging — cabins and rentals around Hereford Reservoir are listed below.
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Hereford Reservoir is a highly nutrient-loaded hypereutrophic lake in Laramie County, Wyoming. Water quality is graded D based on 1 sampling years through 2020. 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. Grade methodology: LakeQuality methodology.
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 D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: D (Nutrient-rich)
Murky, only visible to about 3.7 ft. Phosphorus 860 µg/L. TSI 80. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.7 ft | Not graded |
| Phosphorus | 860 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 80 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Fishing Hereford Reservoir
County Ranking
Ranked #8 of 8 lakes in Laramie County
Nearby Lakes in Laramie County
Frequently asked questions about Hereford Reservoir
Where is Hereford Reservoir?
- Hereford Reservoir is a lake in Laramie County, Wyoming. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Hereford Reservoir?
- Hereford Reservoir in Laramie County, Wyoming has a water quality grade of D (Nutrient-rich). Water clarity: 3.7 ft visibility. Phosphorus: 860 µg/L.
Is Hereford Reservoir safe to swim in?
- The D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Explore Hereford Reservoir across LakeQuality
More Wyoming Lake Rankings
Other Grade D Lakes in Wyoming
Hypereutrophic Lakes in Wyoming
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)
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.