Conchas Lake
San Miguel County, New Mexico1,805 acresView mapDirections
No nutrient or algae sampling on record from NMED for this lake.
- Impaired · Mercury
- 158 ft max depth
Conchas Lake in San Miguel County, New Mexico has water-quality measurements published by NMED, shown here as reported. Maximum depth: 158 ft. Surface area: 1805 acres.
Conchas Lake is a 1,805-acre lake in San Miguel County, New Mexico with a maximum depth of 158 feet.
Source: EPA Water Quality Portal sampling records, NMED. Methodology: how these readings are compared.
What Conchas Lake is good for
From access and monitoring records, not editorial picks.
- Deep water158 ft surveyed max depth
- Big water1,805 acres
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Conchas Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pCBs. Check local advisories before you swim.
Whether Conchas Lake is safe to swim in today is a call for the New Mexico Environment Department and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Conchas Lake
These are the measurements NMED publishes for Conchas Lake, 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 Conchas Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
158 ft
Surface area
1,805 acres
Shoreline
18 mi
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Stays near Conchas Lake
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Fishing Conchas Lake
EPA Impairment Status
Conchas Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life.
Source: EPA ATTAINS assessment unit NM-2304_00 · Official waterbody report
Nearby Lakes in San Miguel County
Frequently asked questions about Conchas Lake
Where is Conchas Lake?
- Conchas Lake is a lake in San Miguel County, New Mexico. Its water-quality measurements are published by NMED and shown on this page as reported.
What is the water quality of Conchas Lake?
- Conchas Lake in San Miguel County, New Mexico has water-quality measurements published by NMED, shown here as reported. Maximum depth: 158 ft. Surface area: 1805 acres.
Is Conchas Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Conchas Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pCBs. Check local advisories before you swim.
How deep is Conchas Lake?
- Conchas Lake has a maximum depth of 158 feet. The lake covers 1805 acres.
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Where this data comes from
Measurements for Conchas Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database