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Tap water quality report

Tuba City, AZ

EPA monitoring detected 7 contaminants across the 1 water supplier serving Tuba City. 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
6,276
people served
7
contaminants found
Arizona rankings Lead in Arizona PFAS in Arizona

What was found in Tuba City'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
1600 µg/L 16%
of the EPA limit 10000 µg/L
Main supplier: Tuba City NTUA · 6,276 people · 2019
1/1 SYR4
Fluoride
160 µg/L 4%
of the EPA limit 4000 µg/L
Main supplier: Tuba City NTUA · 6,276 people · 2018
1/1 SYR4
Lithium
12 µg/L
No EPA limit set
Main supplier: Tuba City NTUA · 6,276 people · 2025
1/1 UCMR-5
TTHM
3.55 µg/L 4.4%
of the EPA limit 80 µg/L
Main supplier: Tuba City NTUA · 6,276 people · 2018
1/1 SYR4
Combined Uranium
1.7 µg/L 5.7%
of the EPA limit 30 µg/L
Main supplier: Tuba City NTUA · 6,276 people · 2014
1/1 SYR4
Mercury
0.3000 µg/L 15%
of the EPA limit 2 µg/L
Main supplier: Tuba City NTUA · 6,276 people · 2018
1/1 SYR4
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
Main supplier: Tuba City NTUA · 6,276 people · 2025
1/1 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 Tuba City

SupplierPopulation served
Tuba City NTUA 6,276

Frequently asked questions about Tuba City tap water

Is Tuba City tap water safe to drink?

EPA testing detected 7 contaminants in the water serving Tuba City. 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 Tuba City?

1 public water supplier report drinking-water monitoring for Tuba City, Arizona to the EPA. Each is listed above with its population served.

What contaminants are in Tuba City's water?

The contaminants EPA monitoring detected in Tuba City include Nitrate, Fluoride, Lithium, TTHM, Combined Uranium. 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.