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Tap water quality report

Chilchinbeto, AZ

EPA monitoring detected 16 contaminants across the 2 water suppliers serving Chilchinbeto. 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
1,414
people served
16
contaminants found
Arizona rankings Lead in Arizona PFAS in Arizona

What was found in Chilchinbeto'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
Nitrite
310 µg/L 31%
of the EPA limit 1000 µg/L
Main supplier: Chilchinbeto NTUA · 1,276 people · 2019
Highest in the city: 2600 µg/L — Chilchinbeto Community Day School BIA · 138 people · 2019
2/2 SYR4
Nitrate
1245 µg/L 12%
of the EPA limit 10000 µg/L
Main supplier: Chilchinbeto NTUA · 1,276 people · 2019
1/2 SYR4
Fluoride
707.4 µg/L 18%
of the EPA limit 4000 µg/L
Main supplier: Chilchinbeto NTUA · 1,276 people · 2014
2/2 SYR4
TTHM
11.08 µg/L 14%
of the EPA limit 80 µg/L
Main supplier: Chilchinbeto NTUA · 1,276 people · 2019
Highest in the city: 14.81 µg/L — Chilchinbeto Community Day School BIA · 138 people · 2019
2/2 SYR4
Chromium
12.6 µg/L 13%
of the EPA limit 100 µg/L
Main supplier: Chilchinbeto NTUA · 1,276 people · 2017
1/2 SYR4
Cyanide
11 µg/L 5.5%
of the EPA limit 200 µg/L
Highest in the city: Chilchinbeto Community Day School BIA · 138 people · 2018
1/2 SYR4
Barium
8.8 µg/L 0.4%
of the EPA limit 2000 µg/L
Main supplier: Chilchinbeto NTUA · 1,276 people · 2017
2/2 SYR4
Arsenic
6.185 µg/L 62%
of the EPA limit 10 µg/L
Main supplier: Chilchinbeto NTUA · 1,276 people · 2018
2/2 SYR4
Combined Uranium
4.24 µg/L 14%
of the EPA limit 30 µg/L
Main supplier: Chilchinbeto NTUA · 1,276 people · 2015
1/2 SYR4
Selenium
2.245 µg/L 4.5%
of the EPA limit 50 µg/L
Highest in the city: Chilchinbeto Community Day School BIA · 138 people · 2018
1/2 SYR4
Di(2-ethylhexyl) Phthalate
2.1 µg/L 35%
of the EPA limit 6 µg/L
Highest in the city: Chilchinbeto Community Day School BIA · 138 people · 2016
1/2 SYR4
Total Haloacetic Acids (HAA5)
1.2025 µg/L 2%
of the EPA limit 60 µg/L
Highest in the city: Chilchinbeto Community Day School BIA · 138 people · 2019
1/2 SYR4
Combined Radium (-226 And -228)
0.7800 pCi/L 16%
of the EPA limit 5 pCi/L
Main supplier: Chilchinbeto NTUA · 1,276 people · 2015
1/2 SYR4
Mercury
0.4950 µg/L 25%
of the EPA limit 2 µg/L
Main supplier: Chilchinbeto NTUA · 1,276 people · 2017
1/2 SYR4
Gross Alpha, Excl. Radon And U
0.4900 pCi/L 3.3%
of the EPA limit 15 pCi/L
Main supplier: Chilchinbeto NTUA · 1,276 people · 2015
1/2 SYR4
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
Main supplier: Chilchinbeto NTUA · 1,276 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 Chilchinbeto

SupplierPopulation served
Chilchinbeto NTUA 1,276
Chilchinbeto Community Day School BIA 138

Frequently asked questions about Chilchinbeto tap water

Is Chilchinbeto tap water safe to drink?

EPA testing detected 16 contaminants in the water serving Chilchinbeto. 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 Chilchinbeto?

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

What contaminants are in Chilchinbeto's water?

The contaminants EPA monitoring detected in Chilchinbeto include Nitrite, Nitrate, Fluoride, TTHM, Chromium. 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.