Ak-Chin Reservoir is a mesotrophic lake in Pinal County, Arizona. Water quality is graded B based on 2 sampling years through 2025.
Source: EPA Water Quality Portal sampling records, Arizona DNR, last sampled 2025-10-29. Grade methodology: LakeGrade methodology.
Watch Ak-Chin Reservoir water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
No clarity data. Phosphorus level: 27 µg/L. Chlorophyll-a: 4.2 µg/L. Trophic State Index: 48.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 27 µg/L | C |
| Chlorophyll-a (Algae) | 4.2 µg/L | B |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Ak-Chin Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Ak-Chin Reservoir in Pinal 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 Ak-Chin 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 Ak-Chin Reservoir?
Get lake water-quality report cards plus the best cabin & lodging deals near Ak-Chin Reservoir — straight to your inbox. No spam, unsubscribe anytime.
Fishing Ak-Chin Reservoir
Location
County Ranking
Ranked #1 of 1 lakes in Pinal County
Nearby Lakes in Pinal County
Explore Ak-Chin Reservoir across LakeGrade
More Arizona Lake Rankings
Other Grade B Lakes in Arizona
Mesotrophic 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: 2025-10-29
Monitoring stations: 1