Alcova Reservoir Transitional Pelagic
Natrona County, WyomingView mapDirections
Clarity, phosphorus, and algae sit in the clean band for this region.
- Mesotrophic
- #2 of 5 in the county
- Public access
- Limited data
Alcova Reservoir Transitional Pelagic in Natrona County, Wyoming has a water quality grade of B (Good). Water clarity: 11.3 ft visibility. Phosphorus: 20 µg/L.
- Clarity
- 11.3 ft
- Type
- Mesotrophic
- Phosphorus
- 20 µg/L
- Trend
- ↑ Improving
- Public access
- Yes
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Alcova Reservoir Transitional Pelagic is a mesotrophic lake in Natrona County, Wyoming. Water quality is graded B based on 1 sampling years through 2018. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 6 public boat landings. Compared to the 4 other monitored lakes in Natrona County, Alcova Reservoir Transitional Pelagic ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2018-09-18. Grade methodology: LakeQuality methodology.
What Alcova Reservoir Transitional Pelagic is good for
From access and monitoring records, not editorial picks.
- Clear water11.3 ft of visibility
- Boat launch6 documented ramps
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 B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: B (Good)
Good clarity, visible to about 11.3 ft. Phosphorus 20 µg/L. TSI 45. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11.3 ft | Not graded |
| Phosphorus | 20 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 45 | Mesotrophic |
Moderate nutrients, good water quality
Recreation & Access
- Okie BeachPublic
- Casper Water Ski ClubSemi-private
- Casper Water Ski ClubSemi-private
- marinaSemi-private
- marinaSemi-private
- marinaSemi-private
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Alcova Reservoir Transitional Pelagic
Water Quality Trend: ↑ Improving
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.18 m/yr | 2 |
| Phosphorus | → Stable | +0.32 µg/L/yr | 3 |
County Ranking
Ranked #2 of 5 lakes in Natrona County
Nearby Lakes in Natrona County
Frequently asked questions about Alcova Reservoir Transitional Pelagic
Where is Alcova Reservoir Transitional Pelagic?
- Alcova Reservoir Transitional Pelagic is a lake in Natrona County, Wyoming. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Alcova Reservoir Transitional Pelagic?
- Alcova Reservoir Transitional Pelagic in Natrona County, Wyoming has a water quality grade of B (Good). Water clarity: 11.3 ft visibility. Phosphorus: 20 µg/L.
Is Alcova Reservoir Transitional Pelagic safe to swim in?
- The B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Alcova Reservoir Transitional Pelagic?
- Alcova Reservoir Transitional Pelagic has 6 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Okie Beach, Casper Water Ski Club, Casper Water Ski Club, marina, among others. Public access is listed as yes.
Explore Alcova Reservoir Transitional Pelagic across LakeQuality
2.6 mi away · recorded at 129°F
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Moderate nutrients, good water quality
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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)
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.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory