Tucson, AZ Tap Water Quality 2026

Water quality report for Tucson, AZ — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Tucson's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Tucson City Of PWSID: AZ0410112 Updated: 2026 Q2

✅

No federal limits exceeded on record

Lead is 0.65 ppb, 4% of the action level and no violations are open. No PFAS was detected.

Tucson earns an A for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: 0.65 ppb — 4% of the federal action level

PFAS tested, none detected

136 violations since 2015, 0 health-based

No violations currently open

Tucson's lead level vs. all Arizona community water systems

0 ppb5 ppb10 ppb15 ppb

Lead level: 0.65 ppb — 4% of the federal action level

✓ Lower lead than 88% of Arizona utilities

Population Served

498439

~191264 connections

Water Source

Groundwater

Drawn from wells — SDWIS source code GW

Active Violations

136 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)

90th percentile of tap samples collected across the distribution system

4% of EPA action level

0.65 ppb

Action level: 15 ppb

The 90th-percentile lead result is 0.65 ppb, 4% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

Contaminant	Type	Measured	Limit	Period	Status
1,2,4-Trichlorobenzene	MONITORING AND REPORTING	—	0.07 mg/L	2026	Archived
cis-1,2-Dichloroethylene	MONITORING AND REPORTING	—	0.07 mg/L	2026	Archived
Xylenes, Total	MONITORING AND REPORTING	—	10 mg/L	2026	Archived
DICHLOROMETHANE	MONITORING AND REPORTING	—	0.005 mg/L	2026	Archived
o-Dichlorobenzene	MONITORING AND REPORTING	—	0.6 mg/L	2026	Archived
p-Dichlorobenzene	MONITORING AND REPORTING	—	0.075 mg/L	2026	Archived
Vinyl chloride	MONITORING AND REPORTING	—	0.002 mg/L	2026	Archived
1,1-Dichloroethylene	MONITORING AND REPORTING	—	0.007 mg/L	2026	Archived
trans-1,2-Dichloroethylene	MONITORING AND REPORTING	—	0.1 mg/L	2026	Archived
1,2-Dichloroethane	MONITORING AND REPORTING	—	0.005 mg/L	2026	Archived
1,1,1-Trichloroethane	MONITORING AND REPORTING	—	0.2 mg/L	2026	Archived
Carbon tetrachloride	MONITORING AND REPORTING	—	0.005 mg/L	2026	Archived
1,2-Dichloropropane	MONITORING AND REPORTING	—	0.005 mg/L	2026	Archived
Trichloroethylene	MONITORING AND REPORTING	—	0.005 mg/L	2026	Archived
1,1,2-Trichloroethane	MONITORING AND REPORTING	—	0.005 mg/L	2026	Archived
Tetrachloroethylene	MONITORING AND REPORTING	—	0.005 mg/L	2026	Archived
CHLOROBENZENE	MONITORING AND REPORTING	—	0.1 mg/L	2026	Archived
Benzene	MONITORING AND REPORTING	—	0.005 mg/L	2026	Archived
Toluene	MONITORING AND REPORTING	—	1 mg/L	2026	Archived
Ethylbenzene	MONITORING AND REPORTING	—	0.7 mg/L	2026	Archived
Styrene	MONITORING AND REPORTING	—	0.1 mg/L	2026	Archived
Gross Alpha, Excl. Radon and U	MONITORING AND REPORTING	—	15 pCi/L	2026	Archived
Combined Uranium	MONITORING AND REPORTING	—	30 ug/L	2026	Archived
Combined Radium (-226 and -228)	MONITORING AND REPORTING	—	5 pCi/L	2026	Archived
Radium-226	MONITORING AND REPORTING	—	—	2026	Archived
Radium-228	MONITORING AND REPORTING	—	—	2026	Archived
Heptachlor epoxide	MONITORING AND REPORTING	—	0.0002 mg/L	2022–2024	Resolved
BHC-GAMMA	MONITORING AND REPORTING	—	0.0002 mg/L	2022–2024	Resolved
Heptachlor	MONITORING AND REPORTING	—	0.0004 mg/L	2022–2024	Resolved
Methoxychlor	MONITORING AND REPORTING	—	0.04 mg/L	2022–2024	Resolved
Endrin	MONITORING AND REPORTING	—	0.002 mg/L	2022–2024	Resolved
LASSO	MONITORING AND REPORTING	—	—	2022–2024	Resolved
Nitrate	MONITORING AND REPORTING	—	10 mg/L	2021	Resolved
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2019	Resolved
Total Haloacetic Acids (HAA5)	MONITORING AND REPORTING	—	0.060 mg/L	2019	Resolved
Gross Alpha, Excl. Radon and U	MONITORING AND REPORTING	—	15 pCi/L	2019	Resolved
Combined Uranium	MONITORING AND REPORTING	—	30 ug/L	2019	Resolved
Combined Radium (-226 and -228)	MONITORING AND REPORTING	—	5 pCi/L	2019	Resolved
Radium-226	MONITORING AND REPORTING	—	—	2019	Resolved
Radium-228	MONITORING AND REPORTING	—	—	2019	Resolved
Arsenic	MONITORING AND REPORTING	—	0.010 mg/L	2019–2021	Resolved
Barium	MONITORING AND REPORTING	—	2 mg/L	2019–2021	Resolved
Cadmium	MONITORING AND REPORTING	—	0.005 mg/L	2019–2021	Resolved
Chromium	MONITORING AND REPORTING	—	0.1 mg/L	2019–2021	Resolved
CYANIDE	MONITORING AND REPORTING	—	0.2 mg/L	2019–2021	Resolved
Fluoride	MONITORING AND REPORTING	—	4.0 mg/L	2019–2021	Resolved
Mercury	MONITORING AND REPORTING	—	0.002 mg/L	2019–2021	Resolved
Nickel	MONITORING AND REPORTING	—	—	2019–2021	Resolved
Antimony, Total	MONITORING AND REPORTING	—	0.006 mg/L	2019–2021	Resolved
Beryllium, Total	MONITORING AND REPORTING	—	0.004 mg/L	2019–2021	Resolved
Thallium, Total	MONITORING AND REPORTING	—	0.002 mg/L	2019–2021	Resolved
Selenium	MONITORING AND REPORTING	—	0.05 mg/L	2019–2021	Resolved
1,2,4-Trichlorobenzene	MONITORING AND REPORTING	—	0.07 mg/L	2019–2021	Resolved
cis-1,2-Dichloroethylene	MONITORING AND REPORTING	—	0.07 mg/L	2019–2021	Resolved
Xylenes, Total	MONITORING AND REPORTING	—	10 mg/L	2019–2021	Resolved
DICHLOROMETHANE	MONITORING AND REPORTING	—	0.005 mg/L	2019–2021	Resolved
o-Dichlorobenzene	MONITORING AND REPORTING	—	0.6 mg/L	2019–2021	Resolved
p-Dichlorobenzene	MONITORING AND REPORTING	—	0.075 mg/L	2019–2021	Resolved
Vinyl chloride	MONITORING AND REPORTING	—	0.002 mg/L	2019–2021	Resolved
1,1-Dichloroethylene	MONITORING AND REPORTING	—	0.007 mg/L	2019–2021	Resolved
trans-1,2-Dichloroethylene	MONITORING AND REPORTING	—	0.1 mg/L	2019–2021	Resolved
1,2-Dichloroethane	MONITORING AND REPORTING	—	0.005 mg/L	2019–2021	Resolved
1,1,1-Trichloroethane	MONITORING AND REPORTING	—	0.2 mg/L	2019–2021	Resolved
Carbon tetrachloride	MONITORING AND REPORTING	—	0.005 mg/L	2019–2021	Resolved
1,2-Dichloropropane	MONITORING AND REPORTING	—	0.005 mg/L	2019–2021	Resolved
Trichloroethylene	MONITORING AND REPORTING	—	0.005 mg/L	2019–2021	Resolved
1,1,2-Trichloroethane	MONITORING AND REPORTING	—	0.005 mg/L	2019–2021	Resolved
Tetrachloroethylene	MONITORING AND REPORTING	—	0.005 mg/L	2019–2021	Resolved
CHLOROBENZENE	MONITORING AND REPORTING	—	0.1 mg/L	2019–2021	Resolved
Benzene	MONITORING AND REPORTING	—	0.005 mg/L	2019–2021	Resolved
Toluene	MONITORING AND REPORTING	—	1 mg/L	2019–2021	Resolved
Ethylbenzene	MONITORING AND REPORTING	—	0.7 mg/L	2019–2021	Resolved
Styrene	MONITORING AND REPORTING	—	0.1 mg/L	2019–2021	Resolved
Endrin	MONITORING AND REPORTING	—	0.002 mg/L	2019–2021	Resolved
BHC-GAMMA	MONITORING AND REPORTING	—	0.0002 mg/L	2019–2021	Resolved
Methoxychlor	MONITORING AND REPORTING	—	0.04 mg/L	2019–2021	Resolved
Toxaphene	MONITORING AND REPORTING	—	0.003 mg/L	2019–2021	Resolved
Dalapon	MONITORING AND REPORTING	—	0.2 mg/L	2019–2021	Resolved
Diquat	MONITORING AND REPORTING	—	0.02 mg/L	2019–2021	Resolved
Endothall	MONITORING AND REPORTING	—	0.1 mg/L	2019–2021	Resolved
Glyphosate	MONITORING AND REPORTING	—	0.7 mg/L	2019–2021	Resolved
Di(2-ethylhexyl) adipate	MONITORING AND REPORTING	—	0.4 mg/L	2019–2021	Resolved
OXAMYL	MONITORING AND REPORTING	—	0.2 mg/L	2019–2021	Resolved
Simazine	MONITORING AND REPORTING	—	0.004 mg/L	2019–2021	Resolved
Di(2-ethylhexyl) phthalate	MONITORING AND REPORTING	—	0.006 mg/L	2019–2021	Resolved
Picloram	MONITORING AND REPORTING	—	0.5 mg/L	2019–2021	Resolved
Dinoseb	MONITORING AND REPORTING	—	0.007 mg/L	2019–2021	Resolved
Hexachlorocyclopentadiene	MONITORING AND REPORTING	—	0.05 mg/L	2019–2021	Resolved
Carbofuran	MONITORING AND REPORTING	—	0.04 mg/L	2019–2021	Resolved
Atrazine	MONITORING AND REPORTING	—	0.003 mg/L	2019–2021	Resolved
LASSO	MONITORING AND REPORTING	—	—	2019–2021	Resolved
2,3,7,8-TCDD	MONITORING AND REPORTING	—	0.00000003 mg/L	2019–2021	Resolved
Heptachlor	MONITORING AND REPORTING	—	0.0004 mg/L	2019–2021	Resolved
Heptachlor epoxide	MONITORING AND REPORTING	—	0.0002 mg/L	2019–2021	Resolved
2,4-D	MONITORING AND REPORTING	—	0.07 mg/L	2019–2021	Resolved
2,4,5-TP	MONITORING AND REPORTING	—	0.05 mg/L	2019–2021	Resolved
HEXACHLOROBENZENE	MONITORING AND REPORTING	—	0.001 mg/L	2019–2021	Resolved
Benzo(a)pyrene	MONITORING AND REPORTING	—	0.0002 mg/L	2019–2021	Resolved
Pentachlorophenol	MONITORING AND REPORTING	—	0.001 mg/L	2019–2021	Resolved
1,2-DIBROMO-3-CHLOROPROPANE	MONITORING AND REPORTING	—	0.0002 mg/L	2019–2021	Resolved
ETHYLENE DIBROMIDE	MONITORING AND REPORTING	—	0.00005 mg/L	2019–2021	Resolved
Chlordane	MONITORING AND REPORTING	—	0.002 mg/L	2019–2021	Resolved
Endrin	MONITORING AND REPORTING	—	0.002 mg/L	2019–2021	Resolved
BHC-GAMMA	MONITORING AND REPORTING	—	0.0002 mg/L	2019–2021	Resolved
Methoxychlor	MONITORING AND REPORTING	—	0.04 mg/L	2019–2021	Resolved
Toxaphene	MONITORING AND REPORTING	—	0.003 mg/L	2019–2021	Resolved
Dalapon	MONITORING AND REPORTING	—	0.2 mg/L	2019–2021	Resolved
Diquat	MONITORING AND REPORTING	—	0.02 mg/L	2019–2021	Resolved
Endothall	MONITORING AND REPORTING	—	0.1 mg/L	2019–2021	Resolved
Glyphosate	MONITORING AND REPORTING	—	0.7 mg/L	2019–2021	Resolved
Di(2-ethylhexyl) adipate	MONITORING AND REPORTING	—	0.4 mg/L	2019–2021	Resolved
OXAMYL	MONITORING AND REPORTING	—	0.2 mg/L	2019–2021	Resolved
Simazine	MONITORING AND REPORTING	—	0.004 mg/L	2019–2021	Resolved
Di(2-ethylhexyl) phthalate	MONITORING AND REPORTING	—	0.006 mg/L	2019–2021	Resolved
Picloram	MONITORING AND REPORTING	—	0.5 mg/L	2019–2021	Resolved
Dinoseb	MONITORING AND REPORTING	—	0.007 mg/L	2019–2021	Resolved
Hexachlorocyclopentadiene	MONITORING AND REPORTING	—	0.05 mg/L	2019–2021	Resolved
Carbofuran	MONITORING AND REPORTING	—	0.04 mg/L	2019–2021	Resolved
Atrazine	MONITORING AND REPORTING	—	0.003 mg/L	2019–2021	Resolved
LASSO	MONITORING AND REPORTING	—	—	2019–2021	Resolved
2,3,7,8-TCDD	MONITORING AND REPORTING	—	0.00000003 mg/L	2019–2021	Resolved
Heptachlor	MONITORING AND REPORTING	—	0.0004 mg/L	2019–2021	Resolved
Heptachlor epoxide	MONITORING AND REPORTING	—	0.0002 mg/L	2019–2021	Resolved
2,4-D	MONITORING AND REPORTING	—	0.07 mg/L	2019–2021	Resolved
2,4,5-TP	MONITORING AND REPORTING	—	0.05 mg/L	2019–2021	Resolved
HEXACHLOROBENZENE	MONITORING AND REPORTING	—	0.001 mg/L	2019–2021	Resolved
Benzo(a)pyrene	MONITORING AND REPORTING	—	0.0002 mg/L	2019–2021	Resolved
Pentachlorophenol	MONITORING AND REPORTING	—	0.001 mg/L	2019–2021	Resolved
1,2-DIBROMO-3-CHLOROPROPANE	MONITORING AND REPORTING	—	0.0002 mg/L	2019–2021	Resolved
ETHYLENE DIBROMIDE	MONITORING AND REPORTING	—	0.00005 mg/L	2019–2021	Resolved
Chlordane	MONITORING AND REPORTING	—	0.002 mg/L	2019–2021	Resolved
Gross Alpha, Excl. Radon and U	MONITORING AND REPORTING	—	15 pCi/L	2016–2021	Resolved
Combined Uranium	MONITORING AND REPORTING	—	30 ug/L	2016–2021	Resolved
Combined Radium (-226 and -228)	MONITORING AND REPORTING	—	5 pCi/L	2016–2021	Resolved
Radium-226	MONITORING AND REPORTING	—	—	2016–2021	Resolved
Radium-228	MONITORING AND REPORTING	—	—	2016–2021	Resolved

Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

136 violations are on record since 2015, of which 0 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Tucson City Of

PWSID AZ0410112

Water source Groundwater — Drawn from wells — SDWIS source code GW

Population served 498,439

Service connections 191,264

Systems serving this area 30

Regulator State primacy agency

Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Tucson tap water safe to drink? ▼

No federal limit is exceeded on record. No violations are currently open. Lead is 0.65 ppb, 4% of the action level.

Does Tucson water have PFAS? ▼

It was tested for the six regulated PFAS compounds and none were detected.

Who supplies water to Tucson? ▼

Tucson City Of (PWSID AZ0410112), one of 30 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW

When was this system last inspected? ▼

It was last inspected on 2025-11-12. No significant deficiencies were recorded.

What Should Tucson Residents Do?

Read your annual water report

Your supplier publishes a Consumer Confidence Report each July covering the prior year.

Check for a lead service line

Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.

Flush before drinking

If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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