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Tap water quality report

Tuba City Ntua

EPA monitoring tested this supplier for 101 contaminants and detected 7. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

101
contaminants tested
7
detected
6,276
people served
3
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.

3
health-based violations
60
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2001-12-01 → 2001-12-31
MCL Health-based Resolved 1993-11-01 → 1993-11-30
MCL Health-based Resolved 1992-04-01 → 1992-04-30
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
MR Monitoring Resolved 2020-01-01 → 2020-12-31
MR Monitoring Resolved 2015-01-01 → 2015-03-31

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 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
1600 µg/L 16%
of the EPA limit 10000 µg/L
 34/34 SYR4 2012–2019
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 19/19 LCR 2025
TTHM
3.55 µg/L 4.4%
of the EPA limit 80 µg/L
worst single sample: 4 µg/L
6/13 SYR4 2013–2018
Lithium
12 µg/L
No EPA limit set
 2/2 UCMR-5 2025
Combined Uranium
1.7 µg/L 5.7%
of the EPA limit 30 µg/L
 1/1 SYR4 2014
Fluoride
160 µg/L 4%
of the EPA limit 4000 µg/L
 1/1 SYR4 2018
Mercury
0.3000 µg/L 15%
of the EPA limit 2 µg/L
 1/1 SYR4 2018
94 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAsbestosAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, 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
[email protected]

Frequently asked questions about Tuba City Ntua

Is Tuba City Ntua tap water safe to drink?

EPA monitoring detected 7 contaminants in Tuba City 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 Tuba City Ntua's water?

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

How many people does Tuba City Ntua serve?

Tuba City Ntua reports serving 6,276 people in Arizona, per its EPA record.

Has Tuba City Ntua had any water quality violations?

The EPA has 60 violations on file for Tuba City Ntua, of which 3 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.