Is Lancaster, TX tap water safe?

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

No federal limits exceeded in EPA data for Rockett Special Utility District. 4 PFAS were detected below the limits.

2 public water systems serve parts of Lancaster. The largest, Rockett Special Utility District, serves 46,614 people. Your water bill names your system.

Largest system

Rockett Special Utility District

46,614 people · Purchased surface water · EPA ID TX0700033

Buys treated water from City of Midlothian, City of Waxahachie.

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 2025, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 0

Across Texas, 28 of 1,130 water systems EPA tested had PFAS above a 2024 federal limit, and 13 systems were above the lead action level in results from the last five years. Texas results.

Lancaster homes and lead pipes

31%

of homes built before 1980 (Texas 33%, US 50%)

built before 1950 (Texas 6%)

32%

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

Which system serves your ZIP code

Based on the ZIP codes each system reported serving. Boundaries don't follow ZIP lines exactly, so your water bill is the final word.

System	ZIP codes in Lancaster
Rockett Special Utility District 46,614 people	75146
City of Lancaster 40,449 people	75134

Other water systems serving Lancaster

City of Lancaster
40,449 people · Purchased surface water · Texas · lists this city
No PFAS above limits

How nearby cities compare

City	Main water system	PFAS	Lead (90th pct.)
DeSoto 5 mi City of Desoto	City of Desoto	None above limits	0 ppb
Duncanville 9 mi City of Duncanville	City of Duncanville	None above limits	1.1 ppb
Cedar Hill 11 mi City of Cedar Hill	City of Cedar Hill	None above limits	0 ppb
Balch Springs 12 mi City of Balch Springs	City of Balch Springs	None above limits	0 ppb
Dallas 14 mi Dallas Water Utility	Dallas Water Utility	None above limits	1.09 ppb
Waxahachie 14 mi City of Waxahachie	City of Waxahachie	None above limits	0 ppb

Questions

Is Lancaster tap water safe to drink?

Rockett Special Utility 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 Lancaster, TX?

2 public water systems serve parts of Lancaster. The largest is Rockett Special Utility District (46,614 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Lancaster tap water have PFAS?

Rockett Special Utility District had 4 PFAS detected at least once in EPA's 2023–2025 testing, all with averages below the federal limits.

Do Lancaster homes have lead pipes?

Census estimates put 31% of Lancaster homes as built before 1980 (Texas: 33%). Lead service lines and lead solder were allowed until 1986, so older homes are more likely to have them. Rockett Special Utility 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.