Blair Trail Reservoir
Blair Trail Reservoir in Elmore County, Idaho is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 178 acres.
- Area
- 178 acres
Next lake in Elmore County
Swipe left or right on this bar to open the next or previous lake.
Why Blair Trail 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 Blair Trail 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 IDEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Blair Trail Reservoir is a 178-acre lake in Elmore County, Idaho.
Source: EPA Water Quality Portal sampling records, IDEQ, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Blair Trail 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 Blair Trail 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 Blair Trail Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Blair Trail Reservoir in Elmore County, Idaho — 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 Blair Trail 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 Idaho’s top lakes →
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 178 acres |
No bathymetric survey has been published for Blair Trail Reservoir, so its depth is not documented here.
Fishing Blair Trail Reservoir
Nearby Lakes in Elmore County
Frequently asked questions about Blair Trail Reservoir
Where is Blair Trail Reservoir?
- Blair Trail Reservoir is a lake in Elmore County, Idaho. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Blair Trail Reservoir?
- Blair Trail Reservoir in Elmore County, Idaho is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 178 acres.
Is Blair Trail Reservoir safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Blair Trail 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 Blair Trail Reservoir across LakeQuality
More Idaho Lake Rankings
Other Lakes in Idaho
Where this data comes from
Measurements for Blair Trail Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.