Tap Water Results

Is Hillsboro, OR 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 Tualatin Valley Water District.

3 public water systems serve parts of Hillsboro. The largest, Tualatin Valley Water District, serves 224,600 people. Your water bill names your system.

Largest system

Tualatin Valley Water District

224,600 people · Purchased surface water · EPA ID OR4100665

Buys treated water from Joint Water Commission, Portland Water Bureau.

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: 5.3 ppb at the 90th percentile (Nov 2026, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 0

Full Tualatin Valley Water District results

Across Oregon, 9 of 123 water systems EPA tested had PFAS above a 2024 federal limit, and 16 systems were above the lead action level in results from the last five years. Oregon results.

Hillsboro homes and lead pipes

24%
of homes built before 1980 (Oregon 49%, US 50%)
5%
built before 1950 (Oregon 16%)
50%
of households rent (Oregon 37%)

Lead service lines and lead solder were allowed until 1986, so homes from before then are the ones to check. 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 Hillsboro city (tables B25034, B25003). Estimates for small places have a margin of error.

Other water systems serving Hillsboro

How nearby cities compare

CityMain water systemPFASLead (90th pct.)
Beaverton 7 mi
Portland Water Bureau
Portland Water BureauNone above limits5.01 ppb
Forest Grove 8 mi
City of Forest Grove
City of Forest GroveNone above limits3.6 ppb
Tigard 10 mi
Portland Water Bureau
Portland Water BureauNone above limits5.01 ppb
Tualatin 13 mi
City of Tualatin
City of TualatinNone above limits4.93 ppb
Lake Oswego 14 mi
Portland Water Bureau
Portland Water BureauNone above limits5.01 ppb
Portland 14 mi
Portland Water Bureau
Portland Water BureauNone above limits5.01 ppb
Hillsboro ZIP codes (1)
  • 97124

Questions

Is Hillsboro tap water safe to drink?

Tualatin Valley Water District 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 Hillsboro, OR?

3 public water systems serve parts of Hillsboro. The largest is Tualatin Valley Water District (224,600 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Hillsboro tap water have PFAS?

None detected above EPA's reporting limits. Tualatin Valley Water District 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 Hillsboro homes have lead pipes?

Census estimates put 24% of Hillsboro homes as built before 1980 (Oregon: 49%). Lead service lines and lead solder were allowed until 1986, so older homes are more likely to have them. Tualatin Valley Water District'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.