Tap Water Results

Is Oro Valley, 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 Oro Valley Water Utility.

2 public water systems serve parts of Oro Valley. The largest, Oro Valley Water Utility, serves 42,316 people. Your water bill names your system.

Largest system

Oro Valley Water Utility

42,316 people · Groundwater · EPA ID AZ0410164

Buys treated water from City of Tucson, Metropolitan Dwid Water System.

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: 1 ppb at the 90th percentile (Dec 2025, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 0

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.

Oro Valley homes and lead pipes

11%
of homes built before 1980 (Arizona 29%, US 50%)
0%
built before 1950 (Arizona 3%)
24%
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. How to check your own line.

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

Other water systems serving Oro Valley

  • Oro Valley Water Countryside
    6,031 people · Groundwater · Arizona · lists this city
    Lithium above screening level

How nearby cities compare

CityMain water systemPFASLead (90th pct.)
Marana 10 mi
City of Tucson
City of TucsonNone above limits0.65 ppb
Tucson 19 mi
City of Tucson
City of TucsonNone above limits0.65 ppb
Sahuarita 34 mi
Sahuarita Water Company
Sahuarita Water CompanyNone above limits0 ppb
Florence 51 mi
Florence Water Company
Florence Water CompanyNone above limits0 ppb
Casa Grande 57 mi
Arizona Water Company – Pinal Valley
Arizona Water Company – Pinal ValleyNone above limits0 ppb
Queen Creek 67 mi
Town of Queen Creek
Town of Queen CreekNone above limits0 ppb
Oro Valley ZIP codes (2)
  • 85737
  • 85755

Questions

Is Oro Valley tap water safe to drink?

Oro Valley Water Utility 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 Oro Valley, AZ?

2 public water systems serve parts of Oro Valley. The largest is Oro Valley Water Utility (42,316 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Oro Valley tap water have PFAS?

None detected above EPA's reporting limits. Oro Valley Water Utility had no PFAS detected in EPA's 2023–2025 testing. "Not detected" means below the reporting limit (about 2 to 20 ppt), not proven zero.

Do Oro Valley homes have lead pipes?

Census estimates put 11% of Oro Valley 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. Oro Valley Water Utility'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.