Is Tucson, AZ tap water safe?

Data: U.S. EPA · How we read the data · How we check it

No federal limits exceeded in EPA data for City of Tucson. 1 PFAS were detected below the limits.

40 public water systems serve parts of Tucson. The largest, City of Tucson, serves 732,906 people, and one system here had PFAS above a federal limit. Your water bill names your system.

Largest system

City of Tucson

732,906 people · Groundwater · EPA ID AZ0410112

Buys treated water from Marana Municipal – Picture Rocks.

PFAS	Highest average	Limit	Status
PFOA Not detected	–	4 ppt	Not detected
PFOS Not detected	–	4 ppt	Not detected
PFHxS Not detected	–	10 ppt	Not detected
PFNA Not detected	–	10 ppt	Not detected
HFPO-DA (GenX) Not detected	–	10 ppt	Not detected

ppt = parts per trillion. "Highest average" is the highest average at any of the system's entry points, the way EPA compares results with the limits.

Lead: 0.65 ppb at the 90th percentile (Dec 2023, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 0

Full City of Tucson results

Across Arizona, 21 of 159 water systems EPA tested had PFAS above a 2024 federal limit, and 10 systems were above the lead action level in results from the last five years. Arizona results.

Tucson homes and lead pipes

53%

of homes built before 1980 (Arizona 29%, US 50%)

built before 1950 (Arizona 3%)

48%

of households rent (Arizona 33%)

Lead service lines and lead solder were allowed until 1986, so homes from before then are the ones to check. City of Tucson publishes a service line inventory you can search by address. Look up your address. Renting? Ask your landlord what the service line is made of, because it's their pipe to replace. How to check your own line.

Housing: Census American Community Survey 2020–2024 5-year estimates for Tucson city (tables B25034, B25003). Estimates for small places have a margin of error.

Other water systems serving Tucson

Metropolitan Dwid Water System
45,570 people · Groundwater · Arizona · lists this city
PFHxS detectedAlso: Lithium above screening level
USAF Davis Monthan AFB
18,640 people · Groundwater · Arizona · lists this city
No PFAS above limits
Vail Water Company
17,500 people · Groundwater · Arizona · lists this city
Lithium above screening level
Flowing Wells Irrigation District
16,000 people · Groundwater · Arizona · lists this city
PFOA above limitAlso: PFOS above limit · PFHxS detected · Lithium above screening level · 1 health-based violation since 2016
Tucson Water Corona de Tucson
10,217 people · Groundwater · Arizona · lists this city
Lithium above screening level
Avra Water Coop Inc
6,685 people · Groundwater · Arizona · lists this city
Lithium above screening level

33 more systems

Metropolitan Dwid – Diablo Village Water System
5,542 people · Groundwater · Arizona · lists this city
Lithium above screening level
Adoc Tucson Water System
4,500 people · Groundwater · Arizona · lists this city
Lithium above screening levelAlso: 1 health-based violation since 2016
Ray Water Company Inc
4,495 people · Groundwater · Arizona · lists this city
Lithium above screening level
Metropolitan Dwid – Hub Water System
4,252 people · Groundwater · Arizona · lists this city
Lithium above screening level
Spanish Trail Water Company
3,822 people · Groundwater · Arizona · lists this city
Coliform bacteria violation
Voyager Water Company
3,121 people · Groundwater · Arizona · lists this city
Lithium above screening level
Mission View Mobile Home Park Water System
1,125 people · Purchased groundwater · Arizona · lists this city
Not in EPA's PFAS sample
Town & Country Estates Water System
960 people · Groundwater · Arizona · lists this city
Coliform bacteria violation
Rincon Country East RV Park Water System
912 people · Groundwater · Arizona · lists this city
Lead above action level
Lakewood Estates Water Company
905 people · Groundwater · Arizona · lists this city
Nitrate violations
Sandario Water Company
885 people · Groundwater · Arizona · lists this city
Not in EPA's PFAS sample
Metropolitan Dwid – E&t System
880 people · Groundwater · Arizona · lists this city
Not in EPA's PFAS sample
Far Horizons East MHP
870 people · Groundwater · Arizona · lists this city
Not in EPA's PFAS sample
Mission Palms Apartments Water System
720 people · Groundwater · Arizona · lists this city
No PFAS above limits
Winterhaven Water Development
685 people · Groundwater · Arizona · lists this city
Not in EPA's PFAS sample
Global Water – Ocotillo Water – Diamond Bell
649 people · Groundwater · Arizona · lists this city
Not in EPA's PFAS sample
La Casita Water Company 3
598 people · Groundwater · Arizona · lists this city
Not in EPA's PFAS sample
Vista del Norte MHP
554 people · Groundwater · Arizona · lists this city
Not in EPA's PFAS sample
Trails West MHP
500 people · Purchased groundwater · Arizona · lists this city
Not in EPA's PFAS sample
Campbell Estates MHP
450 people · Groundwater · Arizona · lists this city
Not in EPA's PFAS sample
Thim Utility Company 2
445 people · Groundwater · Arizona · lists this city
Not in EPA's PFAS sample
Cactus Country RV Resort Water System
420 people · Groundwater · Arizona · lists this city
Coliform bacteria violation
Diamond Grove Mobile Home Estates Water System
385 people · Groundwater · Arizona · lists this city
Not in EPA's PFAS sample
Lazy C Water Service
359 people · Groundwater · Arizona · lists this city
Not in EPA's PFAS sample
Federal Correctional Inst Water System
350 people · Groundwater · Arizona · lists this city
Arsenic violation
Bella Capri MHP
342 people · Groundwater · Arizona · lists this city
Not in EPA's PFAS sampleAlso: 1 health-based violation since 2016
Mesaland Water Company
294 people · Groundwater · Arizona · lists this city
Not in EPA's PFAS sample
Rio Viejo Water
272 people · Groundwater · Arizona · lists this city
Not in EPA's PFAS sample
Rio Mercado Water
266 people · Groundwater · Arizona · lists this city
Not in EPA's PFAS sampleAlso: 1 health-based violation since 2016
La Casita Water Company 2
264 people · Groundwater · Arizona · lists this city
Not in EPA's PFAS sample
Sierrita Mountain Water Coop
258 people · Groundwater · Arizona · lists this city
Not in EPA's PFAS sample
Tierra Linda HOA Water Company
258 people · Groundwater · Arizona · lists this city
Arsenic violation
Far Horizons MHP
258 people · Groundwater · Arizona · lists this city
Not in EPA's PFAS sample

How nearby cities compare

City	Main water system	PFAS	Lead (90th pct.)
Sahuarita 16 mi Sahuarita Water Company	Sahuarita Water Company	None above limits	0 ppb
Oro Valley 19 mi Oro Valley Water Utility	Oro Valley Water Utility	None above limits	1 ppb
Marana 27 mi City of Tucson	City of Tucson	None above limits	0.65 ppb
Sierra Vista 52 mi Bella Vista City Water System	Bella Vista City Water System	None above limits	0 ppb
Florence 71 mi Florence Water Company	Florence Water Company	None above limits	0 ppb
Casa Grande 74 mi Arizona Water Company – Pinal Valley	Arizona Water Company – Pinal Valley	None above limits	0 ppb

Tucson ZIP codes (24)

85701
85705
85706
85707
85708
85709
85710
85711
85712
85713
85714
85715
85716
85719
85721
85723
85724
85726
85730
85734
85745
85747
85748
85756

Questions

Is Tucson tap water safe to drink?

City of Tucson has had no health-based violations since 2016. Utility data can't show lead from your own pipes: if your home was built before 1986, test your tap. Your utility's annual Consumer Confidence Report is the official summary.

Who supplies water in Tucson, AZ?

40 public water systems serve parts of Tucson. The largest is City of Tucson (732,906 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Tucson tap water have PFAS?

City of Tucson had 1 PFAS detected at least once in EPA's 2023–2025 testing, all with averages below the federal limits.

Do Tucson homes have lead pipes?

Census estimates put 53% of Tucson homes as built before 1980 (Arizona: 29%). Lead service lines and lead solder were allowed until 1986, so older homes are more likely to have them. City of Tucson's service line inventory says what your line is made of. The only way to know for your home is to check the line where it enters the house and test your tap.

Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.