Neponset Reservoir
Neponset Reservoir in Rich County, Utah is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 1014 acres.
- Area
- 1,014 acres
Next lake in Rich County
Swipe left or right on this bar to open the next or previous lake.
Why Neponset 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 Neponset 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 Utah DWQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Neponset Reservoir is a 1,014-acre lake in Rich County, Utah.
Source: EPA Water Quality Portal sampling records, Utah DWQ, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Neponset Reservoir water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Neponset 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 Neponset Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Neponset Reservoir in Rich County, Utah — 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 Neponset Reservoir
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Utah’s top lakes →
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 1,014 acres |
No bathymetric survey has been published for Neponset Reservoir, so its depth is not documented here.
Fishing Neponset Reservoir
Nearby Lakes in Rich County
Frequently asked questions about Neponset Reservoir
Where is Neponset Reservoir?
- Neponset Reservoir is a lake in Rich County, Utah. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Neponset Reservoir?
- Neponset Reservoir in Rich County, Utah is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 1014 acres.
Is Neponset Reservoir safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Neponset Reservoir is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Neponset Reservoir across LakeQuality
More Utah Lake Rankings
Other Lakes in Utah
Where this data comes from
Measurements for Neponset Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.