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Tap water quality report

Tolleson City of

EPA monitoring tested this supplier for 101 contaminants and detected 14. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

101
contaminants tested
14
detected
9,300
people served
1
health-based violations
Arizona rankingsLead in ArizonaPFAS in Arizona
Water source
SWP
Ownership
Local government
Counties served
Maricopa

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.

1
health-based violations
118
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1983-08-19 → 1983-10-18
MR Monitoring Archived 2026-03-01 → 2026-03-31
MR Monitoring Archived 2026-01-01 → 2026-01-31
Other Monitoring Resolved 2025-10-02
Other Monitoring Resolved 2025-10-02
Other Monitoring Resolved 2025-10-02
MR Monitoring Resolved 2025-07-01 → 2025-07-31
MR Monitoring Resolved 2025-07-01 → 2025-07-31
MR Monitoring Resolved 2022-07-01 → 2022-07-31
MR Monitoring Resolved 2018-03-01 → 2018-05-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFBS 0.0142 µg/L 4/8 2023
Pfba 0.0065 µg/L 2/8 2023

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
70 µg/L 88%
of the EPA limit 80 µg/L
worst single sample: 75 µg/L
67/67 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
28.8 µg/L 48%
of the EPA limit 60 µg/L
worst single sample: 37 µg/L
67/67 SYR4 2012–2019
Copper
131 µg/L 10%
of the EPA limit 1300 µg/L
worst single sample: 240 µg/L
60/60 SYR4 2012–2018
Nitrate
4400 µg/L 44%
of the EPA limit 10000 µg/L
 32/32 SYR4 2012–2019
Lead
3.15 µg/L 21%
of the EPA limit 15 µg/L
worst single sample: 3.4 µg/L
26/60 SYR4 2012–2018
Lead
0.00066 mg/L 4.4%
of the EPA limit 0.0150 mg/L
 11/11 LCR 2024
Lithium
110 µg/L
No EPA limit set
 8/8 UCMR-5 2023
Arsenic
1.285 µg/L 13%
of the EPA limit 10 µg/L
worst single sample: 1.3 µg/L
2/2 SYR4 2012
Barium
20.7 µg/L 1%
of the EPA limit 2000 µg/L
worst single sample: 21 µg/L
2/2 SYR4 2012
Chromium
4.665 µg/L 4.7%
of the EPA limit 100 µg/L
worst single sample: 4.7 µg/L
2/2 SYR4 2012
Fluoride
99.3 µg/L 2.5%
of the EPA limit 4000 µg/L
worst single sample: 100 µg/L
2/2 SYR4 2012
Nitrate-Nitrite
3760 µg/L 38%
of the EPA limit 10000 µg/L
worst single sample: 3800 µg/L
2/2 SYR4 2012
87 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, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
LARSON, KEVIN E
Phone
623-696-9176
Email
[email protected]

Frequently asked questions about Tolleson City of

Is Tolleson City of tap water safe to drink?

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

EPA monitoring detected TTHM, Total Haloacetic Acids (HAA5), Copper, Nitrate, Lead, and others. The full list with the level and data source for each is above.

How many people does Tolleson City of serve?

Tolleson City of reports serving 9,300 people in Arizona, per its EPA record.

Has Tolleson City of had any water quality violations?

The EPA has 118 violations on file for Tolleson City of, of which 1 is 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.