Alcova Reservoir Lacustrine Pelagic
Natrona County, Wyoming2,471 acresView mapDirections
Wyoming DEQ publishes the water-quality measurements for Alcova Reservoir Lacustrine Pelagic. Here is what has been measured.
- Mesotrophic
- Limited data
Alcova Reservoir Lacustrine Pelagic in Natrona County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Water clarity: 12.8 ft visibility. Phosphorus: 20 µg/L. Surface area: 2471 acres.
Alcova Reservoir Lacustrine Pelagic is a 2,471-acre mesotrophic lake in Natrona County, Wyoming. Water clarity is improving over recent sampling years. Compared to the 4 other monitored lakes in Natrona County, Alcova Reservoir Lacustrine Pelagic ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2018-09-18. Methodology: how these readings are compared.
What Alcova Reservoir Lacustrine Pelagic is good for
From access and monitoring records, not editorial picks.
- Clear water12.8 ft of visibility
- Big water2,471 acres
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 Alcova Reservoir Lacustrine Pelagic 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 Alcova Reservoir Lacustrine Pelagic
These are the measurements Wyoming DEQ publishes for Alcova Reservoir Lacustrine Pelagic, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 12.8 ft. Phosphorus 20 µg/L. TSI 44.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 12.8ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 20µg/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. | 44 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Alcova Reservoir Lacustrine Pelagic
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
2,471 acres
No bathymetric survey has been published for Alcova Reservoir Lacustrine Pelagic, so its depth is not documented here.
Stays via Stay22
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Fishing Alcova Reservoir Lacustrine Pelagic
Water quality readings over time
3 seasons of samples on record (2012–2018). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Improving2 years
Phosphorus
Worsening+0.65 µg/L/yr3 years
Reservoir Info (USACE NID)
Alcova Reservoir Lacustrine Pelagic is a man-made reservoir impounded by the Alcova Dam (completed 1938), built primarily for hydroelectric on the North Platte River; earth-type dam, 265 ft tall and 763 ft long.
- Surface area
- 2,471 ac
- Normal storage
- 184,405 ac-ft
- Max storage
- 184,405 ac-ft
- Drainage area
- 10,736.52 sq mi
- Hazard class
- High
- Owner
- BUREAU OF RECLAMATION
All listed purposes: Hydroelectric;Irrigation.
Source: USACE National Inventory of Dams, NID ID WY01290 · Operator website · Matched by proximity (0.62 km)
Nearby Lakes in Natrona County
Frequently asked questions about Alcova Reservoir Lacustrine Pelagic
Where is Alcova Reservoir Lacustrine Pelagic?
- Alcova Reservoir Lacustrine Pelagic is a lake in Natrona County, Wyoming. Its water-quality measurements are published by Wyoming DEQ and shown on this page as reported.
What is the water quality of Alcova Reservoir Lacustrine Pelagic?
- Alcova Reservoir Lacustrine Pelagic in Natrona County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Water clarity: 12.8 ft visibility. Phosphorus: 20 µg/L. Surface area: 2471 acres.
Is Alcova Reservoir Lacustrine Pelagic 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
9 measurements from 1 monitoring station, 2012–2018. 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_WATERSHED9 samples · 2012–2018
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.