Is Renton, WA 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 Renton. 1 PFAS were detected below the limits.

3 public water systems serve parts of Renton. The largest, City of Renton, serves 108,091 people. Your water bill names your system.

Largest system

City of Renton

108,091 people · Groundwater · EPA ID WA5371850

Buys treated water from Skyway Water & Sewer, Tukwila Water Department, Kent Water Department, Seattle Public Utilities.

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: 1.9 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

Full City of Renton results

Across Washington, 20 of 245 water systems EPA tested had PFAS above a 2024 federal limit, and 17 systems were above the lead action level in results from the last five years. Washington results.

Renton homes and lead pipes

39%

of homes built before 1980 (Washington 43%, US 50%)

built before 1950 (Washington 14%)

46%

of households rent (Washington 36%)

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 Renton city (tables B25034, B25003). Estimates for small places have a margin of error.

Other water systems serving Renton

Soos Creek Water & Sewer District
74,172 people · Purchased surface water · Washington · reported ZIPs here
No PFAS above limits
Coal Creek Utility District
15,989 people · Purchased surface water · Washington · reported ZIPs here
No PFAS above limits

How nearby cities compare

City	Main water system	PFAS	Lead (90th pct.)
Mercer Island 6 mi City of Mercer Island	City of Mercer Island	None above limits	–
Kent 6 mi Kent Water Department	Kent Water Department	None above limits	0 ppb
Burien 7 mi Highline Water District	Highline Water District	None above limits	1.4 ppb
Issaquah 8 mi Sammamish Plateau Water & Sewer	Sammamish Plateau Water & Sewer	Above limit	1.7 ppb
Bellevue 8 mi City of Bellevue	City of Bellevue	None above limits	–
Des Moines 8 mi Highline Water District	Highline Water District	None above limits	1.4 ppb

Renton ZIP codes (3)

98055
98056
98057

Questions

Is Renton tap water safe to drink?

City of Renton 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 Renton, WA?

3 public water systems serve parts of Renton. The largest is City of Renton (108,091 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Renton tap water have PFAS?

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

Do Renton homes have lead pipes?

Census estimates put 39% of Renton homes as built before 1980 (Washington: 43%). Lead service lines and lead solder were allowed until 1986, so older homes are more likely to have them. City of Renton'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.