Tap WaterIndex

← Arizona

Tap water quality report

Rock Springs Community - Ntua

EPA monitoring tested this supplier for 71 contaminants and detected 14. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

71
contaminants tested
14
detected
1,574
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
40
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Archived 2025-01-01 → 2025-12-31
MR Monitoring Resolved 2016-01-01 → 2016-03-31
MR Monitoring Resolved 2016-01-01 → 2016-03-31
MR Monitoring Resolved 2015-10-01 → 2015-12-31
MR Monitoring Resolved 2015-10-01 → 2015-12-31
MR Monitoring Resolved 2015-07-01 → 2015-09-30
MR Monitoring Resolved 2015-07-01 → 2015-09-30
MR Monitoring Resolved 2015-05-01 → 2015-05-31
MR Monitoring Resolved 2015-04-01 → 2015-06-30
MR Monitoring Resolved 2015-04-01 → 2015-06-30

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. 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
 13/13 LCR 2025
TTHM
9.7 µg/L 12%
of the EPA limit 80 µg/L
 11/11 SYR4 2013–2019
Barium
30 µg/L 1.5%
of the EPA limit 2000 µg/L
 7/7 SYR4 2013–2018
Di(2-ethylhexyl) Phthalate
1.5 µg/L 25%
of the EPA limit 6 µg/L
 3/9 SYR4 2013–2019
Fluoride
630 µg/L 16%
of the EPA limit 4000 µg/L
 3/3 SYR4 2014–2018
Chromium
6 µg/L 6%
of the EPA limit 100 µg/L
 2/7 SYR4 2013–2018
Mercury
0.4000 µg/L 20%
of the EPA limit 2 µg/L
 2/6 SYR4 2013–2018
Nitrate
300 µg/L 3%
of the EPA limit 10000 µg/L
 2/28 SYR4 2012–2019
Combined Radium (-226 And -228)
1.5 pCi/L 30%
of the EPA limit 5 pCi/L
 1/3 SYR4 2014–2016
Ethylene Dibromide
0.2000 µg/L 400%
of the EPA limit, in the worst sample — 0.0500 µg/L
 1/6 SYR4 2013–2019
Gross Alpha, Excl. Radon And U
0.6000 pCi/L 4%
of the EPA limit 15 pCi/L
 1/3 SYR4 2014–2016
Nitrite
300 µg/L 30%
of the EPA limit 1000 µg/L
 1/15 SYR4 2012–2019
Selenium
3 µg/L 6%
of the EPA limit 50 µg/L
 1/7 SYR4 2013–2018
Toluene
1 µg/L 0.1%
of the EPA limit 1000 µg/L
 1/8 SYR4 2013–2019
57 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, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
Rayni Nelson
Email
raynin@ntua.com

Frequently asked questions about Rock Springs Community - Ntua

Is Rock Springs Community - Ntua tap water safe to drink?

EPA monitoring detected 14 contaminants in Rock Springs Community - 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 Rock Springs Community - Ntua's water?

EPA monitoring detected Lead, TTHM, Barium, Di(2-ethylhexyl) Phthalate, Fluoride, and others. The full list with the level and data source for each is above.

How many people does Rock Springs Community - Ntua serve?

Rock Springs Community - Ntua reports serving 1,574 people in Arizona, per its EPA record.

Has Rock Springs Community - Ntua had any water quality violations?

The EPA has 40 violations on file for Rock Springs Community - 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.