Where is Sanchez Reservoir?

Sanchez Reservoir is a lake in Costilla County, Colorado. Its water-quality measurements are published by Colorado WQCD and shown on this page as reported.

Sanchez Reservoir

Costilla County, Colorado763 acresView map Directions

No nutrient or algae sampling on record from Colorado WQCD for this lake.

Area

763 acres

Surface area

Shoreline

8.5 mi

Measured length

Impaired · Mercury

See the measurements Directions Where to stay

Sanchez Reservoir in Costilla County, Colorado has water-quality measurements published by Colorado WQCD, shown here as reported. Surface area: 763 acres.

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Sanchez Reservoir is a 763-acre lake in Costilla County, Colorado.

Source: EPA Water Quality Portal sampling records, CDPHE. Methodology: how these readings are compared.

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Sanchez Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.

Whether Sanchez Reservoir is safe to swim in today is a call for the Water Quality Control Division of the Colorado Department of Public Health and Environment and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Sanchez Reservoir

These are the measurements Colorado WQCD publishes for Sanchez Reservoir, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.

No clarity data. TSI undefined.

Ask about Sanchez Reservoir

Answers come straight from the public measurements and survey records on this page.

Lake Details

Surface area

763 acres

Shoreline

8.5 mi

No bathymetric survey has been published for Sanchez Reservoir, so its depth is not documented here.

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Stays near Sanchez Reservoir

Compare lakeside cabins, hotels, and vacation rentals near Sanchez 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 Sanchez Reservoir

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Fishing Sanchez Reservoir

→ Sanchez Reservoir fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Sanchez Reservoir is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).

Causes of impairment

Mercury

Designated uses not supporting: Aquatic life.

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit CORGRG37_A · Official waterbody report

Nearby Lakes in Costilla County

Stabilization Reservoir7.6 miView →Willow Creek Reservoir12.3 miView →Mountain Home Reservoir14.4 ft clear20.9 miView →Smith Reservoir—View →Forbes Park Lake—View →

Frequently asked questions about Sanchez Reservoir

Where is Sanchez Reservoir?: Sanchez Reservoir is a lake in Costilla County, Colorado. Its water-quality measurements are published by Colorado WQCD and shown on this page as reported.
What is the water quality of Sanchez Reservoir?: Sanchez Reservoir in Costilla County, Colorado has water-quality measurements published by Colorado WQCD, shown here as reported. Surface area: 763 acres.
Is Sanchez Reservoir safe to swim in?: Nutrient and algae readings are not a swimming clearance. Sanchez Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.