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Tap water quality report

Kayenta Ntua

EPA monitoring tested this supplier for 101 contaminants and detected 17. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

101
contaminants tested
17
detected
3,844
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
245
violations on file
1
still open
ViolationTypeStatusPeriod
MR Monitoring Archived 2024-01-01 → 2024-12-31
MR Monitoring Archived 2024-01-01 → 2024-12-31
MR Monitoring Archived 2024-01-01 → 2024-12-31
MR Monitoring Archived 2024-01-01 → 2024-12-31
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 2020-01-01 → 2020-12-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
6:2 Fts 0.0051 µg/L 1/14 2023

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
1900 µg/L 19%
of the EPA limit 10000 µg/L
worst single sample: 3000 µg/L
96/100 SYR4 2012–2019
Fluoride
326 µg/L 8.2%
of the EPA limit 4000 µg/L
worst single sample: 350 µg/L
17/18 SYR4 2012–2019
Barium
94.75 µg/L 4.7%
of the EPA limit 2000 µg/L
worst single sample: 127 µg/L
16/21 SYR4 2012–2019
Arsenic
22.04 µg/L 220%
of the EPA limit, at the 95th percentile of samples — 10 µg/L
worst single sample: 47 µg/L
14/22 SYR4 2012–2019
Combined Uranium
4.315 µg/L 14%
of the EPA limit 30 µg/L
worst single sample: 4.7 µg/L
12/12 SYR4 2012–2018
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 12/12 LCR 2025
Lithium
51 µg/L
No EPA limit set
 10/14 UCMR-5 2023
Chromium
6.16 µg/L 6.2%
of the EPA limit 100 µg/L
worst single sample: 8 µg/L
9/22 SYR4 2012–2019
Gross Alpha, Excl. Radon And U
1.23 pCi/L 8.2%
of the EPA limit 15 pCi/L
worst single sample: 1.3 pCi/L
8/12 SYR4 2012–2018
Combined Radium (-226 And -228)
1.1 pCi/L 22%
of the EPA limit 5 pCi/L
worst single sample: 1.2 pCi/L
5/12 SYR4 2012–2018
Mercury
0.4900 µg/L 25%
of the EPA limit 2 µg/L
worst single sample: 0.5000 µg/L
3/19 SYR4 2012–2019
TTHM
2.17 µg/L 2.7%
of the EPA limit 80 µg/L
worst single sample: 2.3 µg/L
3/6 SYR4 2013–2018
Selenium
9.7 µg/L 19%
of the EPA limit 50 µg/L
worst single sample: 10 µg/L
2/19 SYR4 2012–2019
Di(2-ethylhexyl) Phthalate
1.2 µg/L 20%
of the EPA limit 6 µg/L
 1/21 SYR4 2012–2019
Nitrite
320 µg/L 32%
of the EPA limit 1000 µg/L
 1/50 SYR4 2012–2019
Thallium, Total
0.9000 µg/L 45%
of the EPA limit 2 µg/L
 1/19 SYR4 2012–2019
84 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 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
David Shoultz
Phone
9287296277
Email
davids@ntua.com

Frequently asked questions about Kayenta Ntua

Is Kayenta Ntua tap water safe to drink?

EPA monitoring detected 17 contaminants in Kayenta 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 Kayenta Ntua's water?

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

How many people does Kayenta Ntua serve?

Kayenta Ntua reports serving 3,844 people in Arizona, per its EPA record.

Has Kayenta Ntua had any water quality violations?

The EPA has 245 violations on file for Kayenta Ntua, of which 0 are health-based (a contaminant limit or required treatment was breached) and 1 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.