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Tap water quality report

Twin Lakes Ntua

EPA monitoring tested this supplier for 71 contaminants and detected 13. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

71
contaminants tested
13
detected
1,833
people served
7
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.

7
health-based violations
86
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2016-04-01
TT Health-based Resolved 2016-04-01
TT Health-based Resolved 2016-04-01
TT Health-based Resolved 2016-04-01
MCL Health-based Resolved 2015-09-01 → 2015-09-30
MCL Health-based Resolved 2015-09-01 → 2015-09-30
MCL Health-based Resolved 2015-09-01 → 2015-09-30
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

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
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 12/12 LCR 2025
TTHM
9.15 µg/L 11%
of the EPA limit 80 µg/L
worst single sample: 9.4 µg/L
6/6 SYR4 2013–2018
Barium
96.2 µg/L 4.8%
of the EPA limit 2000 µg/L
worst single sample: 107 µg/L
4/4 SYR4 2012–2017
Fluoride
406.4 µg/L 10%
of the EPA limit 4000 µg/L
worst single sample: 416 µg/L
3/4 SYR4 2012–2016
Nitrate
40 µg/L 0.4%
of the EPA limit 10000 µg/L
 2/26 SYR4 2012–2019
Arsenic
5.9 µg/L 59%
of the EPA limit 10 µg/L
 1/4 SYR4 2012–2017
Beryllium, Total
0.2000 µg/L 5%
of the EPA limit 4 µg/L
 1/5 SYR4 2012–2017
Combined Radium (-226 And -228)
0.3000 pCi/L 6%
of the EPA limit 5 pCi/L
 1/3 SYR4 2013–2017
Combined Uranium
1 µg/L 3.3%
of the EPA limit 30 µg/L
 1/3 SYR4 2013–2017
Di(2-ethylhexyl) Adipate
0.7000 µg/L 0.2%
of the EPA limit 400 µg/L
 1/4 SYR4 2013–2017
Gross Alpha, Excl. Radon And U
0.4000 pCi/L 2.7%
of the EPA limit 15 pCi/L
 1/3 SYR4 2013–2017
Mercury
0.5000 µg/L 25%
of the EPA limit 2 µg/L
 1/4 SYR4 2013–2017
Total Polychlorinated Biphenyls (PCB)
0.1100 µg/L 22%
of the EPA limit 0.5000 µg/L
 1/4 SYR4 2013–2017
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, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)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 Twin Lakes Ntua

Is Twin Lakes Ntua tap water safe to drink?

EPA monitoring detected 13 contaminants in Twin Lakes 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 Twin Lakes Ntua's water?

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

How many people does Twin Lakes Ntua serve?

Twin Lakes Ntua reports serving 1,833 people in Arizona, per its EPA record.

Has Twin Lakes Ntua had any water quality violations?

The EPA has 86 violations on file for Twin Lakes Ntua, of which 7 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.