Pinal County Lake Quality
Arizona, 3 lakes, measured by ADEQ
Pinal County has 3 monitored lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. 1 of those lake carry recent nutrient and algae readings. The county-level summary describes that subset, not every water body listed. The county-wide picture is low-to-moderate phosphorus with clear summer transparency across most monitored lakes.
The county's lakes lean shallow, which makes the readings sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest measured lake is Ak-Chin Reservoir.
Where to stay near Pinal County
Top-rated places to stay near Pinal County
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
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 Pinal County?
Get lake water-quality updates plus the best cabin & lodging deals near Pinal County — straight to your inbox. No spam, unsubscribe anytime.
Quick Answers for Pinal County
Planning a trip? Check special fishing regulations for Ak-Chin Reservoir — or check the official Arizona fishing regulations.
All Lakes in Pinal County
3 lakes · 1 ranked on readings, 2 without enough sampling1 lake ranked on readings · 2 without enough sampling, hidden
| # | Lake | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|
| 1 | Ak-Chin ReservoirPinal | No recent samples | 27.5 µg/L | 4.2 µg/L | No recent samples | Not recorded |
| Picacho ReservoirPinal | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Lake Saint ClairPinal | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded |
NR = no nutrient or algae reading on record. The measurements are published as the authority reports them. Where the data comes from.
Lake Match
Which lake suits how you actually use one?
Six questions — swimming, fishing, quiet, cabins, drive time — and a shortlist of lakes that fit, with the water quality behind each one.
Other Counties in Arizona
Browse every Arizona lake, or the full directory of lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..
Source: the Arizona Department of Environmental Quality. See data sources.