Ned Wilson Lake
Rio Blanco County, ColoradoView 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.
- Limited data
Ned Wilson Lake in Rio Blanco County, Colorado is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 13.5 µg/L.
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Watch Ned Wilson Lake’s letter
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Why Ned Wilson Lake 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 Ned Wilson Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded phosphorus, but not water clarity and 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 CDPHE and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Ned Wilson Lake is a lake in Rio Blanco County, Colorado.
Source: EPA Water Quality Portal sampling records, CDPHE, last sampled 2020-09-03. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Ned Wilson Lake is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO). Check local advisories before you swim.
Water quality measurements for Ned Wilson Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Phosphorus 13.5 µg/L. TSI 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 13.5 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Fishing Ned Wilson Lake
EPA Impairment Status
Ned Wilson Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit COLCWH24_C · Official waterbody report
Graded lakes near Ned Wilson Lake
Ned Wilson Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Rio Blanco County
Frequently asked questions about Ned Wilson Lake
Where is Ned Wilson Lake?
- Ned Wilson Lake is a lake in Rio Blanco County, Colorado. 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 Ned Wilson Lake?
- Ned Wilson Lake in Rio Blanco County, Colorado is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 13.5 µg/L.
Is Ned Wilson Lake safe to swim in?
- The letter is not a swimming clearance. Ned Wilson Lake is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO). Check local advisories before you swim.
Explore Ned Wilson Lake across LakeQuality
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Where this data comes from
2 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- USGS Colorado Water Science Center
USGS-CO2 samples · 2020
Analytical methods
- P, wu, WCA, persulfate CF color
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
Impairment status from EPA ATTAINS 303(d) database