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Tap water quality report

White Post Mission, Shonto, AZ

EPA monitoring detected 12 contaminants across the 1 water supplier serving White Post Mission, Shonto. 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.

1
water supplier
185
people served
12
contaminants found
Arizona rankings Lead in Arizona PFAS in Arizona

What was found in White Post Mission, Shonto'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
Fluoride
2308 µg/L 58%
of the EPA limit 4000 µg/L
Main supplier: White Post Mission NTUA · 185 people · 2017
1/1 SYR4
Nitrate
1600 µg/L 16%
of the EPA limit 10000 µg/L
Main supplier: White Post Mission NTUA · 185 people · 2019
1/1 SYR4
Barium
213.65 µg/L 11%
of the EPA limit 2000 µg/L
Main supplier: White Post Mission NTUA · 185 people · 2017
1/1 SYR4
TTHM
8.01 µg/L 10%
of the EPA limit 80 µg/L
Main supplier: White Post Mission NTUA · 185 people · 2019
1/1 SYR4
Arsenic
3.975 µg/L 40%
of the EPA limit 10 µg/L
Main supplier: White Post Mission NTUA · 185 people · 2017
1/1 SYR4
Combined Uranium
2.61 µg/L 8.7%
of the EPA limit 30 µg/L
Main supplier: White Post Mission NTUA · 185 people · 2017
1/1 SYR4
Gross Alpha, Excl. Radon And U
2.19 pCi/L 15%
of the EPA limit 15 pCi/L
Main supplier: White Post Mission NTUA · 185 people · 2017
1/1 SYR4
Di(2-ethylhexyl) Phthalate
1.095 µg/L 18%
of the EPA limit 6 µg/L
Main supplier: White Post Mission NTUA · 185 people · 2017
1/1 SYR4
Cadmium
1 µg/L 20%
of the EPA limit 5 µg/L
Main supplier: White Post Mission NTUA · 185 people · 2017
1/1 SYR4
Mercury
0.5000 µg/L 25%
of the EPA limit 2 µg/L
Main supplier: White Post Mission NTUA · 185 people · 2017
1/1 SYR4
Lead
0.0021 mg/L 14%
of the EPA limit 0.0150 mg/L
Main supplier: White Post Mission NTUA · 185 people · 2025
1/1 LCR
2,3,7,8-TCDD
0.0000050 µg/L 17%
of the EPA limit 0.000030 µg/L
Main supplier: White Post Mission NTUA · 185 people · 2019
1/1 SYR4
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 White Post Mission, Shonto

SupplierPopulation served
White Post Mission NTUA 185

Frequently asked questions about White Post Mission, Shonto tap water

Is White Post Mission, Shonto tap water safe to drink?

EPA testing detected 12 contaminants in the water serving White Post Mission, Shonto. 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 White Post Mission, Shonto?

1 public water supplier report drinking-water monitoring for White Post Mission, Shonto, Arizona to the EPA. Each is listed above with its population served.

What contaminants are in White Post Mission, Shonto's water?

The contaminants EPA monitoring detected in White Post Mission, Shonto include Fluoride, Nitrate, Barium, TTHM, Arsenic. 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.