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Sweetwater Ntua

EPA monitoring tested this supplier for 70 contaminants and detected 14. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

70
contaminants tested
14
detected
2,014
people served
44
health-based violations
Arizona rankingsLead in ArizonaPFAS in Arizona
Water source
SWP
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.

44
health-based violations
137
violations on file
2
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 2025-07-01 → 2025-09-30
MCL Health-based Resolved 2024-04-01 → 2024-06-30
MCL Health-based Resolved 2024-04-01 → 2024-06-30
MCL Health-based Resolved 2024-01-01 → 2024-03-31
MCL Health-based Resolved 2024-01-01 → 2024-03-31
MCL Health-based Resolved 2023-10-01 → 2023-12-31
MCL Health-based Resolved 2023-10-01 → 2023-12-31
MCL Health-based Resolved 2023-07-01 → 2023-09-30
MCL Health-based Resolved 2023-07-01 → 2023-09-30
MCL Health-based Resolved 2021-01-01 → 2021-03-31

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
Arsenic
24.5 µg/L 245%
of the EPA limit, at the 95th percentile of samples — 10 µg/L
worst single sample: 29.7 µg/L
41/42 SYR4 2012–2019
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2025
TTHM
96.775 µg/L 121%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 114 µg/L
14/14 SYR4 2013–2019
Combined Uranium
31.97 µg/L 107%
of the EPA limit, at the 95th percentile of samples — 30 µg/L
worst single sample: 33.5 µg/L
10/10 SYR4 2012–2018
Nitrate
350 µg/L 3.5%
of the EPA limit 10000 µg/L
 10/32 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
26.515 µg/L 44%
of the EPA limit 60 µg/L
worst single sample: 29 µg/L
8/14 SYR4 2013–2019
Gross Alpha, Excl. Radon And U
5.56 pCi/L 37%
of the EPA limit 15 pCi/L
worst single sample: 5.8 pCi/L
7/10 SYR4 2012–2018
Barium
18 µg/L 0.9%
of the EPA limit 2000 µg/L
worst single sample: 19 µg/L
5/6 SYR4 2012–2018
Fluoride
1580 µg/L 40%
of the EPA limit 4000 µg/L
 5/6 SYR4 2012–2018
Chromium
8.57 µg/L 8.6%
of the EPA limit 100 µg/L
worst single sample: 9 µg/L
2/6 SYR4 2012–2018
Combined Radium (-226 And -228)
0.7800 pCi/L 16%
of the EPA limit 5 pCi/L
worst single sample: 0.8000 pCi/L
2/10 SYR4 2012–2018
Mercury
0.4000 µg/L 20%
of the EPA limit 2 µg/L
 1/5 SYR4 2012–2018
Nitrite
370 µg/L 37%
of the EPA limit 1000 µg/L
 1/16 SYR4 2012–2019
Total Polychlorinated Biphenyls (PCB)
0.1000 µg/L 20%
of the EPA limit 0.5000 µg/L
 1/5 SYR4 2013–2018
56 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, TotalTolueneToxapheneTrichloroethyleneVinyl 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 Sweetwater Ntua

Is Sweetwater Ntua tap water safe to drink?

EPA monitoring detected 14 contaminants in Sweetwater 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 Sweetwater Ntua's water?

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

How many people does Sweetwater Ntua serve?

Sweetwater Ntua reports serving 2,014 people in Arizona, per its EPA record.

Has Sweetwater Ntua had any water quality violations?

The EPA has 137 violations on file for Sweetwater Ntua, of which 44 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.