Four Mile Reservoir
San Juan County, New MexicoView mapDirections
No nutrient or algae sampling on record from NMED for this lake.
- Limited data
Four Mile Reservoir in San Juan County, New Mexico has water-quality measurements published by NMED, shown here as reported.
Four Mile Reservoir is a lake in San Juan County, New Mexico.
Source: EPA Water Quality Portal sampling records, NMED, last sampled 2015-05-28. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Four Mile Reservoir 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 Four Mile Reservoir
These are the measurements NMED publishes for Four Mile 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.
Ask about Four Mile Reservoir
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays near Four Mile Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Four Mile Reservoir in San Juan County, New Mexico — 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.
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Fishing Four Mile Reservoir
Nearby Lakes in San Juan County
Frequently asked questions about Four Mile Reservoir
Where is Four Mile Reservoir?
- Four Mile Reservoir is a lake in San Juan County, New Mexico. Its water-quality measurements are published by NMED and shown on this page as reported.
What is the water quality of Four Mile Reservoir?
- Four Mile Reservoir in San Juan County, New Mexico has water-quality measurements published by NMED, shown here as reported.
Is Four Mile Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Four Mile Reservoir across LakeQuality
Planning a trip around Mesa Verde?
Four Mile Reservoir is about 27 miles from Mesa Verde National Park. Crowds there swing hard by season, so the month you pick changes both how busy the park is and what lodging costs.
Best time to visit Mesa Verde →More lakes in New Mexico
Other Lakes in New Mexico
Where this data comes from
1 measurement from 1 monitoring station, 2015. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Ute Mountain Utes Tribe (Colorado) (Tribal)
UTEMTN1 sample · 2015
Analytical methods
- Phosphorus by Two Reagent Colorimetry
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.