A And M Reservoir
Sweetwater County, Wyoming6 acresView mapDirections
Wyoming DEQ publishes the water-quality measurements for A And M Reservoir. Here is what has been measured.
- Limited data
A And M Reservoir in Sweetwater County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Phosphorus: 30 µg/L. Surface area: 6 acres.
A And M Reservoir is a 6-acre lake in Sweetwater County, Wyoming.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2013-09-09. 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 A And M 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 A And M Reservoir
These are the measurements Wyoming DEQ publishes for A And M Reservoir, 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 30 µg/L. TSI 53.
| 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 | 30µg/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. | 53 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about A And M Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
6 acres
No bathymetric survey has been published for A And M Reservoir, so its depth is not documented here.
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Fishing A And M Reservoir
Reservoir Info (USACE NID)
A And M Reservoir is a man-made reservoir impounded by the A & M (completed 1978), built primarily for fish and wildlife pond on the A & M Draw; earth-type dam, 31 ft tall and 344 ft long.
- Surface area
- 6 ac
- Normal storage
- 31 ac-ft
- Max storage
- 126 ac-ft
- Drainage area
- 1 sq mi
- Hazard class
- Low
- Owner
- USDI BLM
Source: USACE National Inventory of Dams, NID ID WY02496 · Operator website · Matched by proximity (0.07 km)
Nearby Lakes in Sweetwater County
Frequently asked questions about A And M Reservoir
Where is A And M Reservoir?
- A And M Reservoir is a lake in Sweetwater County, Wyoming. Its water-quality measurements are published by Wyoming DEQ and shown on this page as reported.
What is the water quality of A And M Reservoir?
- A And M Reservoir in Sweetwater County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Phosphorus: 30 µg/L. Surface area: 6 acres.
Is A And M Reservoir 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
3 measurements from 1 monitoring station, 2013. 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_WATERSHED3 samples · 2013
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.