Tap Water Results

Is Marana, AZ tap water safe?

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

Summary

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

12 public water systems serve parts of Marana. The largest, City of Tucson, serves 732,906 people, and 2 systems 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.

PFASHighest averageLimitStatus
PFOA
Not detected
–4 pptNot detected
PFOS
Not detected
–4 pptNot detected
PFHxS
Not detected
–10 pptNot detected
PFNA
Not detected
–10 pptNot detected
HFPO-DA (GenX)
Not detected
–10 pptNot 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.

Marana homes and lead pipes

4%
of homes built before 1980 (Arizona 29%, US 50%)
0%
built before 1950 (Arizona 3%)
16%
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. How to check your own line.

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

Other water systems serving Marana

5 more systems
  • Marana Dwid – Culver Water System
    709 people · Groundwater · Arizona · lists this city
    Not in EPA's PFAS sampleAlso: 3 health-based violations since 2016
  • Marana Municipal – Tortolita Mountain
    200 people · Purchased groundwater · Arizona · lists this city
    Not in EPA's PFAS sample
  • Marana Municipal – Palo Verde
    128 people · Groundwater · Arizona · lists this city
    Not in EPA's PFAS sample
  • Rancho Tierra Blanca Poa Water System
    126 people · Groundwater · Arizona · lists this city
    Not in EPA's PFAS sample
  • Global Water – Saguaro District Water Company – Lyn Lee
    106 people · Groundwater · Arizona · lists this city
    Not in EPA's PFAS sample

How nearby cities compare

CityMain water systemPFASLead (90th pct.)
Oro Valley 10 mi
Oro Valley Water Utility
Oro Valley Water UtilityNone above limits1 ppb
Tucson 27 mi
City of Tucson
City of TucsonNone above limits0.65 ppb
Sahuarita 38 mi
Sahuarita Water Company
Sahuarita Water CompanyNone above limits0 ppb
Florence 45 mi
Florence Water Company
Florence Water CompanyNone above limits0 ppb
Casa Grande 48 mi
Arizona Water Company – Pinal Valley
Arizona Water Company – Pinal ValleyNone above limits0 ppb
Queen Creek 60 mi
Town of Queen Creek
Town of Queen CreekNone above limits0 ppb
Marana ZIP codes (1)
  • 85658

Questions

Is Marana 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 Marana, AZ?

12 public water systems serve parts of Marana. 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 Marana 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 Marana homes have lead pipes?

Census estimates put 4% of Marana 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.