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Tap water quality report

White Post Mission Ntua

EPA monitoring tested this supplier for 71 contaminants and detected 12. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

71
contaminants tested
12
detected
185
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
1,060
violations on file
2
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2016-01-01 → 2016-12-31
MR Monitoring Resolved 2016-01-01 → 2016-12-31
MR Monitoring Resolved 2016-01-01 → 2016-12-31
MR Monitoring Resolved 2016-01-01 → 2016-12-31
MR Monitoring Resolved 2016-01-01 → 2016-12-31
MR Monitoring Resolved 2016-01-01 → 2016-12-31
MR Monitoring Resolved 2015-01-01 → 2015-12-31
MR Monitoring Resolved 2015-01-01 → 2015-12-31
MR Monitoring Resolved 2015-01-01 → 2015-12-31
MR Monitoring Resolved 2015-01-01 → 2015-12-31

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 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
 28/28 SYR4 2012–2019
Barium
213.65 µg/L 11%
of the EPA limit 2000 µg/L
worst single sample: 215 µg/L
10/10 SYR4 2012–2017
Fluoride
2308 µg/L 58%
of the EPA limit 4000 µg/L
worst single sample: 2630 µg/L
8/10 SYR4 2012–2017
Combined Uranium
2.61 µg/L 8.7%
of the EPA limit 30 µg/L
worst single sample: 2.7 µg/L
7/8 SYR4 2013–2017
Gross Alpha, Excl. Radon And U
2.19 pCi/L 15%
of the EPA limit 15 pCi/L
worst single sample: 2.7 pCi/L
7/8 SYR4 2013–2017
Lead
0.0021 mg/L 14%
of the EPA limit 0.0150 mg/L
 6/6 LCR 2025
TTHM
8.01 µg/L 10%
of the EPA limit 80 µg/L
worst single sample: 8.7 µg/L
3/8 SYR4 2013–2019
Arsenic
3.975 µg/L 40%
of the EPA limit 10 µg/L
worst single sample: 4.1 µg/L
2/10 SYR4 2012–2017
Di(2-ethylhexyl) Phthalate
1.095 µg/L 18%
of the EPA limit 6 µg/L
worst single sample: 1.1 µg/L
2/10 SYR4 2012–2017
2,3,7,8-TCDD
0.0000050 µg/L 17%
of the EPA limit 0.000030 µg/L
 1/11 SYR4 2012–2019
Cadmium
1 µg/L 20%
of the EPA limit 5 µg/L
 1/10 SYR4 2012–2017
Mercury
0.5000 µg/L 25%
of the EPA limit 2 µg/L
 1/10 SYR4 2012–2017
59 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal 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 White Post Mission Ntua

Is White Post Mission Ntua tap water safe to drink?

EPA monitoring detected 12 contaminants in White Post Mission 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 Post Mission Ntua's water?

EPA monitoring detected Nitrate, Barium, Fluoride, Combined Uranium, Gross Alpha, Excl. Radon And U, and others. The full list with the level and data source for each is above.

How many people does White Post Mission Ntua serve?

White Post Mission Ntua reports serving 185 people in Arizona, per its EPA record.

Has White Post Mission Ntua had any water quality violations?

The EPA has 1060 violations on file for White Post Mission Ntua, of which 0 are health-based (a contaminant limit or required treatment was breached) and 2 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.