Is Manassas, VA tap water safe?

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

No federal limits exceeded in EPA data for Prince William Water – West. 2 PFAS were detected below the limits.

2 public water systems serve parts of Manassas. The largest, Prince William Water – West, serves 136,409 people. Your water bill names your system.

Largest system

Prince William Water – West

136,409 people · Purchased surface water · EPA ID VA6153251

Buys treated water from City of Manassas, Fairfax County Water Authority.

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 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 Prince William Water – West results

Across Virginia, 12 of 164 water systems EPA tested had PFAS above a 2024 federal limit, and 3 systems were above the lead action level in results from the last five years. Virginia results.

Manassas homes and lead pipes

35%

of homes built before 1980 (Virginia 44%, US 50%)

built before 1950 (Virginia 11%)

28%

of households rent (Virginia 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 Manassas city (tables B25034, B25003). Estimates for small places have a margin of error.

Other water systems serving Manassas

City of Manassas
42,696 people · Surface water · Virginia · lists this city
No PFAS above limits

How nearby cities compare

City	Main water system	PFAS	Lead (90th pct.)
Herndon 16 mi Fairfax County Water Authority	Fairfax County Water Authority	Above limit	1.2 ppb
Alexandria 22 mi Fairfax County Water Authority	Fairfax County Water Authority	Above limit	1.2 ppb
Leesburg 25 mi Town of Leesburg	Town of Leesburg	None above limits	0 ppb
Fredericksburg 31 mi City of Fredericksburg	City of Fredericksburg	None above limits	0 ppb
Winchester 48 mi City of Winchester	City of Winchester	None above limits	2.7 ppb
Charlottesville 73 mi City of Charlottesville	City of Charlottesville	None above limits	0 ppb

Manassas ZIP codes (1)

20110

Questions

Is Manassas tap water safe to drink?

Prince William Water – West 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 Manassas, VA?

2 public water systems serve parts of Manassas. The largest is Prince William Water – West (136,409 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Manassas tap water have PFAS?

Prince William Water – West had 2 PFAS detected at least once in EPA's 2023–2025 testing, all with averages below the federal limits.

Do Manassas homes have lead pipes?

Census estimates put 35% of Manassas homes as built before 1980 (Virginia: 44%). Lead service lines and lead solder were allowed until 1986, so older homes are more likely to have them. Prince William Water – West'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.