Who supplies water to Tucson?

TUCSON CITY OF, EPA public water system ID AZ0410112, serving 732,906 people across 191,264 service connections.

Tucson, AZ

Is Tucson tap water safe to drink?

Q: Is Tucson tap water safe to drink?

TUCSON CITY OF serves 732,906 people in Tucson from groundwater. Its federal record shows 164 violations, 0 of them health-based. A violation record is a compliance history, not a water quality test — the contaminant levels themselves are in the utility's annual Consumer Confidence Report.

TUCSON CITY OF supplies 732,906 people here, drawing groundwater. Here is its entire federal compliance record — and, just as importantly, what that record cannot tell you.

Kitchen tap running — Tucson municipal drinking water

People served

732,906

TUCSON CITY OF

Source

groundwater

Violations on record

164

all time

Health-based

none on record

The short answer

TUCSON CITY OF has citations on its record, but none for exceeding a health limit.

These are monitoring and paperwork failures, not contamination. Nothing here is a reason to spend money. If you filter, do it because you dislike the taste — which is a real reason and a cheap one to fix.

What to buy

Probably nothing

We make our money when you buy something through us, so read this in that light: there is nothing on this utility’s record that justifies spending. If the water tastes off to you that is a real problem worth a $28 pitcher, and if you drink a lot of it the calculator will tell you whether a plumbed system pays for itself on cost alone. Neither is about safety here.

The full record

Every violation, most recent first

From	Contaminant	What happened	Health-based
2026-01-01	1,2,4-Trichlorobenzene	missed monitoring or reporting	no
2026-01-01	cis-1,2-Dichloroethylene	missed monitoring or reporting	no
2026-01-01	Xylenes (total)	missed monitoring or reporting	no
2026-01-01	Dichloromethane	missed monitoring or reporting	no
2026-01-01	o-Dichlorobenzene	missed monitoring or reporting	no
2026-01-01	p-Dichlorobenzene	missed monitoring or reporting	no
2026-01-01	Vinyl chloride	missed monitoring or reporting	no
2026-01-01	1,1-Dichloroethylene	missed monitoring or reporting	no
2026-01-01	trans-1,2-Dichloroethylene	missed monitoring or reporting	no
2026-01-01	1,2-Dichloroethane	missed monitoring or reporting	no
2026-01-01	1,1,1-Trichloroethane	missed monitoring or reporting	no
2026-01-01	Carbon tetrachloride	missed monitoring or reporting	no

Showing the 12 most recent of 164. The complete record is public at EPA ECHO.

What it means for filter choice

Every citation on this system is a monitoring or reporting failure rather than a health-based one — paperwork, not contamination. That is worth knowing before spending anything: it is not evidence you need a filter. Test your own tap for $14 and decide on the number, not on the utility's admin record.

What filtering costs here →This utility on EPA ECHO

What this record cannot tell you

This is a compliance record, not a water test. It describes the utility, not the pipe between the water main and your kitchen — which is where lead usually enters, and which no federal record covers. It also cannot tell you what is in your water today; a citation is a point in time. The measured levels are in your utility’s annual Consumer Confidence Report, which it must publish and which is free.

Source: US EPA Safe Drinking Water Information System, retrieved 2026-08-31 from data.epa.gov. Public water system AZ0410112. Nothing on this page is written by hand — if a figure is not in EPA’s response, it does not appear here. All cities.