Terrace Reservoir
Conejos County, Colorado140 acresView mapDirections
No nutrient or algae sampling on record from Colorado WQCD for this lake.
- Impaired · Metals (other than mercury)
- 135 ft max depth
Terrace Reservoir in Conejos County, Colorado has water-quality measurements published by Colorado WQCD, shown here as reported. Maximum depth: 135 ft. Surface area: 140 acres.
Terrace Reservoir is a 140-acre lake in Conejos County, Colorado with a maximum depth of 135 feet.
Source: EPA Water Quality Portal sampling records, CDPHE. Methodology: how these readings are compared.
What Terrace Reservoir is good for
From access and monitoring records, not editorial picks.
- Deep water135 ft surveyed max depth
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Terrace Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for metals (other than mercury). Check local advisories before you swim.
Whether Terrace 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.
Water quality measurements for Terrace Reservoir
These are the measurements Colorado WQCD publishes for Terrace 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 Terrace Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
135 ft
Surface area
140 acres
Shoreline
3.5 mi
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Fishing Terrace Reservoir
EPA Impairment Status
Terrace Reservoir is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Aquatic life.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit CORGAL08_A · Official waterbody report
Nearby Lakes in Conejos County
Frequently asked questions about Terrace Reservoir
Where is Terrace Reservoir?
- Terrace Reservoir is a lake in Conejos County, Colorado. Its water-quality measurements are published by Colorado WQCD and shown on this page as reported.
What is the water quality of Terrace Reservoir?
- Terrace Reservoir in Conejos County, Colorado has water-quality measurements published by Colorado WQCD, shown here as reported. Maximum depth: 135 ft. Surface area: 140 acres.
Is Terrace Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Terrace Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for metals (other than mercury). Check local advisories before you swim.
How deep is Terrace Reservoir?
- Terrace Reservoir has a maximum depth of 135 feet. The lake covers 140 acres.
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Where this data comes from
Measurements for Terrace Reservoir 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