Bonny Reservoir
Bonny Reservoir in Yuma County, Colorado is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 1846 acres.
- Area
- 1,846 acres
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Why Bonny Reservoir 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 Bonny Reservoir, no water-quality sampling on record for this lake.
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.
Bonny Reservoir is a 1,846-acre lake in Yuma County, Colorado.
Source: EPA Water Quality Portal sampling records, CDPHE, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Bonny Reservoir water quality
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Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Bonny Reservoir
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay near Bonny Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Bonny Reservoir in Yuma County, Colorado — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Bonny Reservoir
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 1,846 acres |
No bathymetric survey has been published for Bonny Reservoir, so its depth is not documented here.
Fishing Bonny Reservoir
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Frequently asked questions about Bonny Reservoir
Where is Bonny Reservoir?
- Bonny Reservoir is a lake in Yuma County, Colorado. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Bonny Reservoir?
- Bonny Reservoir in Yuma County, Colorado is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 1846 acres.
Is Bonny Reservoir safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Bonny Reservoir is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
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Where this data comes from
Measurements for Bonny Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.