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Tap water quality report

Fountain Hills, AZ

EPA monitoring detected 17 contaminants across the 2 water suppliers serving Fountain Hills. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

2
water suppliers
33,286
people served
17
contaminants found
Arizona rankings Lead in Arizona PFAS in Arizona

What was found in Fountain Hills's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
2865 µg/L 29%
of the EPA limit 10000 µg/L
Main supplier: EPCOR - CHAPARRAL CITY · 26,026 people · 2019
Highest in the city: 9300 µg/L — Fort McDowell Community · 7,260 people · 2019
2/2 SYR4
Nitrate-Nitrite
2991 µg/L 30%
of the EPA limit 10000 µg/L
Main supplier: EPCOR - CHAPARRAL CITY · 26,026 people · 2019
1/2 SYR4
Fluoride
1719.5 µg/L 43%
of the EPA limit 4000 µg/L
Main supplier: EPCOR - CHAPARRAL CITY · 26,026 people · 2018
2/2 SYR4
Copper
324.4 µg/L 25%
of the EPA limit 1300 µg/L
Main supplier: EPCOR - CHAPARRAL CITY · 26,026 people · 2019
1/2 SYR4
Barium
125 µg/L 6.3%
of the EPA limit 2000 µg/L
Main supplier: EPCOR - CHAPARRAL CITY · 26,026 people · 2019
2/2 SYR4
TTHM
116.3 µg/L 145%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: EPCOR - CHAPARRAL CITY · 26,026 people · 2019
2/2 SYR4
Lithium
74.7 µg/L
No EPA limit set
Main supplier: EPCOR - CHAPARRAL CITY · 26,026 people · 2024
2/2 UCMR-5
Total Haloacetic Acids (HAA5)
36.48 µg/L 61%
of the EPA limit 60 µg/L
Main supplier: EPCOR - CHAPARRAL CITY · 26,026 people · 2019
2/2 SYR4
Lead
16.25 µg/L 108%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: EPCOR - CHAPARRAL CITY · 26,026 people · 2019
1/2 SYR4
Chromium
11.04 µg/L 11%
of the EPA limit 100 µg/L
Main supplier: EPCOR - CHAPARRAL CITY · 26,026 people · 2019
2/2 SYR4
Arsenic
9.475 µg/L 95%
of the EPA limit 10 µg/L
Main supplier: EPCOR - CHAPARRAL CITY · 26,026 people · 2019
Highest in the city: 11 µg/L — Fort McDowell Community · 7,260 people · 2019
2/2 SYR4
Selenium
7.9 µg/L 16%
of the EPA limit 50 µg/L
Main supplier: EPCOR - CHAPARRAL CITY · 26,026 people · 2019
2/2 SYR4
Gross Alpha, Excl. Radon And U
5.415 pCi/L 36%
of the EPA limit 15 pCi/L
Main supplier: EPCOR - CHAPARRAL CITY · 26,026 people · 2015
1/2 SYR4
Combined Radium (-226 And -228)
3.945 pCi/L 79%
of the EPA limit 5 pCi/L
Main supplier: EPCOR - CHAPARRAL CITY · 26,026 people · 2019
1/2 SYR4
Combined Uranium
2.335 µg/L 7.8%
of the EPA limit 30 µg/L
Main supplier: EPCOR - CHAPARRAL CITY · 26,026 people · 2015
Highest in the city: 2.57 µg/L — Fort McDowell Community · 7,260 people · 2016
2/2 SYR4
Di(2-ethylhexyl) Phthalate
1.2 µg/L 20%
of the EPA limit 6 µg/L
Main supplier: EPCOR - CHAPARRAL CITY · 26,026 people · 2018
1/2 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: EPCOR - CHAPARRAL CITY · 26,026 people · 2025
Highest in the city: 0.0039 mg/L — Fort McDowell Community · 7,260 people · 2025
2/2 LCR
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Fountain Hills

SupplierPopulation served
EPCOR - CHAPARRAL CITY 26,026
Fort McDowell Community 7,260

Frequently asked questions about Fountain Hills tap water

Is Fountain Hills tap water safe to drink?

EPA testing detected 17 contaminants in the water serving Fountain Hills. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Fountain Hills?

2 public water suppliers report drinking-water monitoring for Fountain Hills, Arizona to the EPA. Each is listed above with its population served.

What contaminants are in Fountain Hills's water?

The contaminants EPA monitoring detected in Fountain Hills include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium. The full list, with the level at the main supplier and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.