Lyman Reservoir is a highly nutrient-loaded hypereutrophic lake in Apache County, Arizona. Water quality is graded F based on 1 sampling years through 2026. Compared to the 10 other monitored lakes in Apache County, Lyman Reservoir ranks #10 for water quality.
Source: EPA Water Quality Portal sampling records, Arizona DNR, last sampled 2026-03-22. Grade methodology: LakeGrade methodology.
Watch Lyman Reservoir water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 0.3 ft of visibility. Phosphorus level: 160 µg/L. Trophic State Index: 85.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.3 ft | F |
| Phosphorus | 160 µg/L | F |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 85 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Lyman Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Lyman Reservoir in Apache County, Arizona — 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 Lyman Reservoir
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Lyman Reservoir?
Get lake water-quality report cards plus the best cabin & lodging deals near Lyman Reservoir — straight to your inbox. No spam, unsubscribe anytime.
Fishing Lyman Reservoir
Location
County Ranking
Ranked #10 of 11 lakes in Apache County
Cleaner Lakes Within 30 Miles
Lyman Reservoir holds Grade F. One nearby lake has a higher grade.
Nearby Lakes in Apache County
Explore Lyman Reservoir across LakeGrade
More Arizona Lake Rankings
Other Grade F Lakes in Arizona
Hypereutrophic Lakes in Arizona
More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2026-03-22
Monitoring stations: 1