Is Little Elm, 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 Mustang Special Utility District. 3 PFAS were detected below the limits.

3 public water systems serve parts of Little Elm. The largest, Mustang Special Utility District, serves 127,911 people. Your water bill names your system.

Largest system

Mustang Special Utility District

127,911 people · Purchased surface water · EPA ID TX0610036

Buys treated water from Utrwd Regional Water Treatment Plant.

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: 1.33 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 Mustang Special Utility District results

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.

Little Elm homes and lead pipes

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

built before 1950 (Texas 6%)

30%

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. How to check your own line.

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

Other water systems serving Little Elm

Town of Little Elm
43,348 people · Purchased surface water · Texas · lists this city
No PFAS above limits
Frisco West Water Control & Improvement District
5,805 people · Purchased surface water · Texas · reported ZIPs here
Lithium above screening level

How nearby cities compare

City	Main water system	PFAS	Lead (90th pct.)
Frisco 6 mi City of Frisco	City of Frisco	None above limits	1.4 ppb
Prosper 7 mi Town of Prosper	Town of Prosper	None above limits	1.98 ppb
The Colony 7 mi City of the Colony	City of the Colony	None above limits	0.62 ppb
Corinth 9 mi City of Corinth	City of Corinth	None above limits	2.3 ppb
Lewisville 11 mi City of Lewisville	City of Lewisville	None above limits	1.48 ppb
Celina 11 mi Mustang Special Utility District	Mustang Special Utility District	None above limits	1.33 ppb

Little Elm ZIP codes (1)

75068

Questions

Is Little Elm tap water safe to drink?

Mustang 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 Little Elm, TX?

3 public water systems serve parts of Little Elm. The largest is Mustang Special Utility District (127,911 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Little Elm tap water have PFAS?

Mustang Special Utility District had 3 PFAS detected at least once in EPA's 2023–2025 testing, all with averages below the federal limits.

Do Little Elm homes have lead pipes?

Census estimates put 2% of Little Elm 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. Mustang 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.