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Tap water quality report

Nogales City of

EPA monitoring tested this supplier for 104 contaminants and detected 14. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

104
contaminants tested
14
detected
22,000
people served
37
health-based violations
Arizona rankingsLead in ArizonaPFAS in Arizona
Water source
Ground water
Ownership
Local government
Counties served
Santa Cruz

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.

37
health-based violations
1,947
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2021-11-15
TT Health-based Resolved 2021-11-15
TT Health-based Resolved 2021-11-15
TT Health-based Resolved 2021-11-15
TT Health-based Resolved 2016-11-11

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
TTHM
18 µg/L 23%
of the EPA limit 80 µg/L
worst single sample: 51 µg/L
97/138 SYR4 2012–2019
Copper
363 µg/L 28%
of the EPA limit 1300 µg/L
worst single sample: 1000 µg/L
88/90 SYR4 2012–2018
Arsenic
9.935 µg/L 99%
of the EPA limit 10 µg/L
worst single sample: 13 µg/L
74/80 SYR4 2012–2019
Nitrate
3280 µg/L 33%
of the EPA limit 10000 µg/L
worst single sample: 3700 µg/L
62/78 SYR4 2012–2019
Lead
3.325 µg/L 22%
of the EPA limit 15 µg/L
worst single sample: 4.6 µg/L
42/90 SYR4 2012–2018
Total Haloacetic Acids (HAA5)
3.29 µg/L 5.5%
of the EPA limit 60 µg/L
worst single sample: 3.6 µg/L
23/138 SYR4 2012–2019
Combined Uranium
6.86 µg/L 23%
of the EPA limit 30 µg/L
worst single sample: 7.9 µg/L
14/15 SYR4 2012–2018
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 11/11 LCR 2024
Gross Alpha, Excl. Radon And U
3.505 pCi/L 23%
of the EPA limit 15 pCi/L
worst single sample: 4.9 pCi/L
10/15 SYR4 2012–2018
Lithium
57.4 µg/L
No EPA limit set
 9/10 UCMR-5 2025
Nitrate-Nitrite
2200 µg/L 22%
of the EPA limit 10000 µg/L
 6/8 SYR4 2012–2018
Fluoride
2860 µg/L 72%
of the EPA limit 4000 µg/L
worst single sample: 3000 µg/L
5/13 SYR4 2012–2018
Asbestos
20.005 MFL 286%
of the EPA limit, at the 95th percentile of samples — 7 MFL
worst single sample: 23.5 MFL
4/19 SYR4 2012–2019
Trichloroethylene
1.8 µg/L 36%
of the EPA limit 5 µg/L
 1/22 SYR4 2012–2018
90 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
ARTANA, RUBEN
Phone
520-287-6571
Email
[email protected]

Frequently asked questions about Nogales City of

Is Nogales City of tap water safe to drink?

EPA monitoring detected 14 contaminants in Nogales City of'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 Nogales City of's water?

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

How many people does Nogales City of serve?

Nogales City of reports serving 22,000 people in Arizona, per its EPA record.

Has Nogales City of had any water quality violations?

The EPA has 1947 violations on file for Nogales City of, of which 37 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.