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Tap water quality report

Dennehotso Ntua

EPA monitoring tested this supplier for 70 contaminants and detected 12. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

70
contaminants tested
12
detected
1,040
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
49
violations on file
0
still open
ViolationTypeStatusPeriod
MON Monitoring Resolved 2017-04-01 → 2017-04-30
MON Monitoring Resolved 2017-04-01 → 2017-04-30
MON Monitoring Resolved 2017-04-01 → 2017-04-30
MON Monitoring Resolved 2017-03-01 → 2017-03-31
MON Monitoring Resolved 2017-03-01 → 2017-03-31
MON Monitoring Resolved 2017-03-01 → 2017-03-31
MON Monitoring Resolved 2017-02-01 → 2017-02-28
MON Monitoring Resolved 2017-02-01 → 2017-02-28
MON Monitoring Resolved 2017-02-01 → 2017-02-28
MR Monitoring Resolved 2017-01-01 → 2017-12-31

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
1410 µg/L 14%
of the EPA limit 10000 µg/L
worst single sample: 1500 µg/L
30/32 SYR4 2012–2019
Fluoride
34696.5 µg/L 867%
of the EPA limit, at the 95th percentile of samples — 4000 µg/L
worst single sample: 74500 µg/L
12/12 SYR4 2014–2019
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 12/12 LCR 2025
Barium
36 µg/L 1.8%
of the EPA limit 2000 µg/L
 6/6 SYR4 2014–2019
Combined Uranium
9.33 µg/L 31%
of the EPA limit 30 µg/L
worst single sample: 10.2 µg/L
4/4 SYR4 2012–2015
Arsenic
6.53 µg/L 65%
of the EPA limit 10 µg/L
worst single sample: 6.7 µg/L
3/6 SYR4 2014–2019
TTHM
6.03 µg/L 7.5%
of the EPA limit 80 µg/L
worst single sample: 6.4 µg/L
3/6 SYR4 2013–2019
Chromium
3.105 µg/L 3.1%
of the EPA limit 100 µg/L
worst single sample: 3.2 µg/L
2/8 SYR4 2012–2019
Gross Alpha, Excl. Radon And U
2.26 pCi/L 15%
of the EPA limit 15 pCi/L
worst single sample: 2.3 pCi/L
2/4 SYR4 2012–2015
Combined Radium (-226 And -228)
0.5000 pCi/L 10%
of the EPA limit 5 pCi/L
 1/4 SYR4 2012–2015
Mercury
0.6000 µg/L 30%
of the EPA limit 2 µg/L
 1/6 SYR4 2014–2019
Nitrite
300 µg/L 30%
of the EPA limit 1000 µg/L
 1/16 SYR4 2012–2019
58 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-DAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, 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 Dennehotso Ntua

Is Dennehotso Ntua tap water safe to drink?

EPA monitoring detected 12 contaminants in Dennehotso 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 Dennehotso Ntua's water?

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

How many people does Dennehotso Ntua serve?

Dennehotso Ntua reports serving 1,040 people in Arizona, per its EPA record.

Has Dennehotso Ntua had any water quality violations?

The EPA has 49 violations on file for Dennehotso 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.