Mianus Reservoir
Mianus Reservoir in Western Connecticut County, Connecticut is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 201 acres.
- Area
- 201 acres
Next lake in Western Connecticut County
Swipe left or right on this bar to open the next or previous lake.
Why Mianus 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 Mianus 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 your state environmental agency and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Mianus Reservoir is a 201-acre lake in Western Connecticut County, Connecticut.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Mianus 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 Mianus 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 Mianus Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Mianus Reservoir in Western Connecticut County, Connecticut — 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 Mianus Reservoir
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 201 acres |
No bathymetric survey has been published for Mianus Reservoir, so its depth is not documented here.
Fishing Mianus Reservoir
Nearby Lakes in Western Connecticut County
Frequently asked questions about Mianus Reservoir
Where is Mianus Reservoir?
- Mianus Reservoir is a lake in Western Connecticut County, Connecticut. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Mianus Reservoir?
- Mianus Reservoir in Western Connecticut County, Connecticut is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 201 acres.
Is Mianus Reservoir safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Mianus 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 Mianus Reservoir across LakeQuality
More Connecticut Lake Rankings
Other Lakes in Connecticut
Where this data comes from
Measurements for Mianus Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.