Alcova Reservoir Transitional Littoral
Natrona County, WyomingView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Public access
- Limited data
Alcova Reservoir Transitional Littoral in Natrona County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 5.2 ft visibility. Phosphorus: 15 µg/L.
- Clarity
- 5.2 ft
- Phosphorus
- 15 µg/L
- Trend
- ↑ Improving
- Public access
- Yes
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Watch Alcova Reservoir Transitional Littoral’s letter
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Why Alcova Reservoir Transitional Littoral has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Alcova Reservoir Transitional Littoral, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity and phosphorus, but not algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by Wyoming DEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Alcova Reservoir Transitional Littoral is a lake in Natrona County, Wyoming. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2013-07-09. Grade methodology: LakeQuality methodology.
What Alcova Reservoir Transitional Littoral is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Alcova Reservoir Transitional Littoral
These readings exist but are not enough for an A–F grade — see why.
Murky, only visible to about 5.2 ft. Phosphorus 15 µg/L. TSI 48.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.2 ft | Not graded |
| Phosphorus | 15 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
Recreation & Access
- Cottonwood BeachPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Alcova Reservoir Transitional Littoral
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 |
Graded lakes near Alcova Reservoir Transitional Littoral
Alcova Reservoir Transitional Littoral has no grade, but these lakes within a short drive do.
Nearby Lakes in Natrona County
Frequently asked questions about Alcova Reservoir Transitional Littoral
Where is Alcova Reservoir Transitional Littoral?
- Alcova Reservoir Transitional Littoral is a lake in Natrona County, Wyoming. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Alcova Reservoir Transitional Littoral?
- Alcova Reservoir Transitional Littoral in Natrona County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 5.2 ft visibility. Phosphorus: 15 µg/L.
Is Alcova Reservoir Transitional Littoral safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Alcova Reservoir Transitional Littoral?
- Alcova Reservoir Transitional Littoral has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Cottonwood Beach. Public access is listed as yes.
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Where this data comes from
3 measurements from 1 monitoring station, 2012–2013. 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 · 2012–2013
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