Smith Reservoir
Smith Reservoir in Costilla County, Colorado is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 674 acres.
- Area
- 674 acres
- Public access
- Yes
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Why Smith 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 Smith 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.
Smith Reservoir is a 674-acre lake in Costilla County, Colorado. Limited fish-species data available. Public access is available with 2 public boat landings.
Source: EPA Water Quality Portal sampling records, CDPHE, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Smith 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 Smith 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 Smith Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Smith Reservoir in Costilla 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 Smith Reservoir
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 674 acres |
| Public Access | Yes |
No bathymetric survey has been published for Smith Reservoir, so its depth is not documented here.
Recreation & Access
- Smith Reservoir State Wildlife AreaPublic
- Smith Reservoir State Wildlife AreaPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Smith Reservoir
Nearby Lakes in Costilla County
Frequently asked questions about Smith Reservoir
Where is Smith Reservoir?
- Smith Reservoir is a lake in Costilla 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 Smith Reservoir?
- Smith Reservoir in Costilla County, Colorado is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 674 acres.
Is Smith Reservoir safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Smith Reservoir is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Are there boat ramps on Smith Reservoir?
- Smith Reservoir has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Smith Reservoir State Wildlife Area, Smith Reservoir State Wildlife Area. Public access is listed as yes.
Explore Smith Reservoir across LakeQuality
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Where this data comes from
Measurements for Smith Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory