What is the water quality grade for Navajo Reservoir?

Navajo Reservoir in San Juan County, New Mexico received a water quality grade of A (Excellent). Water clarity: 16 ft visibility. Chlorophyll-a (algae): 1.3 µg/L.

Is Navajo Reservoir safe to swim in?

Excellent for swimming, crystal clear water with minimal algae. Navajo Reservoir has an overall water quality grade of A. Algae concentration (chlorophyll-a) is 1.3 µg/L. Always check local health department advisories before swimming.

San Juan County, New Mexico

Navajo Reservoir

Grade AExcellent · 16 ft clarity

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Limited DataOligotrophic

Navajo Reservoir is a cold, clear oligotrophic lake in San Juan County, New Mexico. Water quality is graded A based on 1 sampling years through 2016. Compared to the 6 other monitored lakes in San Juan County, Navajo Reservoir ranks #1 for water quality.

Source: EPA Water Quality Portal sampling records, New Mexico DNR, last sampled 2016-07-20. Grade methodology: LakeGrade methodology.

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Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Crystal clear, you can see 16 ft down. Chlorophyll-a: 1.3 µg/L. Trophic State Index: 35.

Metric	Value	Grade
Water Clarity (Secchi Depth)	16 ft	A
Phosphorus	No data
Chlorophyll-a (Algae)	1.3 µg/L	A
Trophic State Index (TSI)	35	Oligotrophic

Low nutrients, clear water, excellent for swimming

Where to stay near Navajo Reservoir

Compare lakeside cabins, hotels, and vacation rentals near Navajo 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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