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Tap water quality report

White Mesa Ntua

EPA monitoring tested this supplier for 70 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

70
contaminants tested
11
detected
496
people served
0
health-based violations
Arizona rankingsLead in ArizonaPFAS in Arizona
Water source
Ground water
Ownership
Native American

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

0
health-based violations
94
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2024-01-01
MR Monitoring Resolved 2024-01-01
MR Monitoring Resolved 2021-01-01
MR Monitoring Resolved 2021-01-01
MR Monitoring Resolved 2021-01-01
MR Monitoring Resolved 2020-01-01 → 2020-12-31
MR Monitoring Resolved 2020-01-01 → 2020-12-31
MR Monitoring Resolved 2020-01-01 → 2020-12-31
MR Monitoring Resolved 2020-01-01 → 2020-12-31
MR Monitoring Resolved 2020-01-01 → 2020-12-31

Other contaminants detected

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
2100 µg/L 21%
of the EPA limit 10000 µg/L
 24/24 SYR4 2012–2019
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2025
Barium
123 µg/L 6.2%
of the EPA limit 2000 µg/L
 5/6 SYR4 2013–2019
Fluoride
530 µg/L 13%
of the EPA limit 4000 µg/L
 5/5 SYR4 2013–2019
TTHM
10.8 µg/L 14%
of the EPA limit 80 µg/L
 5/7 SYR4 2013–2018
Mercury
0.4000 µg/L 20%
of the EPA limit 2 µg/L
 2/6 SYR4 2013–2019
Antimony, Total
4 µg/L 67%
of the EPA limit 6 µg/L
 1/6 SYR4 2013–2019
Combined Uranium
1.1 µg/L 3.7%
of the EPA limit 30 µg/L
 1/2 SYR4 2014–2016
Di(2-ethylhexyl) Phthalate
0.7000 µg/L 12%
of the EPA limit 6 µg/L
 1/4 SYR4 2012–2018
Gross Alpha, Excl. Radon And U
0.9000 pCi/L 6%
of the EPA limit 15 pCi/L
 1/2 SYR4 2014–2016
Pentachlorophenol
0.5000 µg/L 50%
of the EPA limit 1 µg/L
 1/4 SYR4 2012–2018
59 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,3,7,8-TCDD2,4,5-TP2,4-DArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorNitriteOxamylPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
Raquel Whitehorse
Phone
9287296239
Email
raquelw@ntua.com

Frequently asked questions about White Mesa Ntua

Is White Mesa Ntua tap water safe to drink?

EPA monitoring detected 11 contaminants in White Mesa Ntua's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in White Mesa Ntua's water?

EPA monitoring detected Nitrate, Lead, Barium, Fluoride, TTHM, and others. The full list with the level and data source for each is above.

How many people does White Mesa Ntua serve?

White Mesa Ntua reports serving 496 people in Arizona, per its EPA record.

Has White Mesa Ntua had any water quality violations?

The EPA has 94 violations on file for White Mesa Ntua, of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

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.