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Tap water quality report

Casamero Lake-Smith Lake Ntua

EPA monitoring tested this supplier for 71 contaminants and detected 17. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

71
contaminants tested
17
detected
906
people served
5
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.

5
health-based violations
182
violations on file
3
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2014-07-01 → 2014-07-31
MCL Health-based Resolved 2014-07-01 → 2014-07-31
MCL Health-based Resolved 2014-07-01 → 2014-07-31
MCL Health-based Resolved 2008-08-01 → 2008-08-31
MCL Health-based Resolved 2008-08-01 → 2008-08-31
Other Monitoring Unaddressed 2016-04-01
MR Monitoring Resolved 2014-10-01 → 2014-12-31
MR Monitoring Resolved 2014-10-01 → 2014-12-31
MR Monitoring Resolved 2014-10-01 → 2014-12-31
MR Monitoring Resolved 2014-10-01 → 2014-12-31

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
Fluoride
1700 µg/L 43%
of the EPA limit 4000 µg/L
 11/11 SYR4 2012–2019
Arsenic
18.83 µg/L 188%
of the EPA limit, at the 95th percentile of samples — 10 µg/L
worst single sample: 26.3 µg/L
10/18 SYR4 2012–2019
Barium
253.2 µg/L 13%
of the EPA limit 2000 µg/L
worst single sample: 350 µg/L
9/9 SYR4 2012–2019
Combined Uranium
11.1 µg/L 37%
of the EPA limit 30 µg/L
worst single sample: 12.7 µg/L
5/7 SYR4 2012–2019
TTHM
41.1 µg/L 51%
of the EPA limit 80 µg/L
worst single sample: 41.5 µg/L
5/7 SYR4 2013–2019
Gross Alpha, Excl. Radon And U
2.9 pCi/L 19%
of the EPA limit 15 pCi/L
worst single sample: 3 pCi/L
3/7 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
9.94 µg/L 17%
of the EPA limit 60 µg/L
worst single sample: 10.2 µg/L
3/7 SYR4 2013–2019
Mercury
0.4950 µg/L 25%
of the EPA limit 2 µg/L
worst single sample: 0.5000 µg/L
2/7 SYR4 2012–2019
Toluene
0.9800 µg/L 0.1%
of the EPA limit 1000 µg/L
worst single sample: 1 µg/L
2/8 SYR4 2012–2018
Cadmium
2 µg/L 40%
of the EPA limit 5 µg/L
 1/9 SYR4 2012–2019
Combined Radium (-226 And -228)
0.9000 pCi/L 18%
of the EPA limit 5 pCi/L
 1/7 SYR4 2012–2019
Di(2-ethylhexyl) Phthalate
1.1 µg/L 18%
of the EPA limit 6 µg/L
 1/10 SYR4 2012–2018
Ethylene Dibromide
0.0100 µg/L 20%
of the EPA limit 0.0500 µg/L
 1/9 SYR4 2012–2018
Nitrite
400 µg/L 40%
of the EPA limit 1000 µg/L
 1/21 SYR4 2012–2019
Selenium
5 µg/L 10%
of the EPA limit 50 µg/L
 1/9 SYR4 2012–2019
Total Polychlorinated Biphenyls (PCB)
0.1000 µg/L 20%
of the EPA limit 0.5000 µg/L
 1/9 SYR4 2012–2018
54 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)PyreneBeryllium, TotalChlorobenzeneCyanideCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorNitrateOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalToxapheneTrichloroethyleneVinyl 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 Casamero Lake-Smith Lake Ntua

Is Casamero Lake-Smith Lake Ntua tap water safe to drink?

EPA monitoring detected 17 contaminants in Casamero Lake-Smith Lake 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 Casamero Lake-Smith Lake Ntua's water?

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

How many people does Casamero Lake-Smith Lake Ntua serve?

Casamero Lake-Smith Lake Ntua reports serving 906 people in Arizona, per its EPA record.

Has Casamero Lake-Smith Lake Ntua had any water quality violations?

The EPA has 182 violations on file for Casamero Lake-Smith Lake Ntua, of which 5 are health-based (a contaminant limit or required treatment was breached) and 3 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.