Tap Water Results

Is Frisco, TX 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 City of Frisco. 4 PFAS were detected below the limits.

3 public water systems serve parts of Frisco. The largest, City of Frisco, serves 231,910 people. Your water bill names your system.

Largest system

City of Frisco

231,910 people · Purchased surface water · EPA ID TX0430005

Buys treated water from North Texas Municipal Water District Wylie Water Treatment Plant.

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: 1.4 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 City of Frisco 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.

Frisco homes and lead pipes

2%
of homes built before 1980 (Texas 33%, US 50%)
0%
built before 1950 (Texas 6%)
34%
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 Frisco city (tables B25034, B25003). Estimates for small places have a margin of error.

Other water systems serving Frisco

  • City of the Colony
    45,367 people · Purchased surface water · Texas · reported ZIPs here
    Lithium above screening level
  • Bryan County Rws & Swmd #2
    6,270 people · Surface water · Oklahoma · reported ZIPs here
    Total trihalomethanes (TTHM) violationsAlso: Haloacetic acids (HAA5) violation

How nearby cities compare

CityMain water systemPFASLead (90th pct.)
Prosper 6 mi
Town of Prosper
Town of ProsperNone above limits1.98 ppb
Little Elm 6 mi
Mustang Special Utility District
Mustang Special Utility DistrictNone above limits1.33 ppb
The Colony 7 mi
City of the Colony
City of the ColonyNone above limits0.62 ppb
Plano 8 mi
City of Plano
City of PlanoNone above limits1.68 ppb
Allen 9 mi
City of Allen
City of AllenNone above limits1.7 ppb
McKinney 10 mi
City of McKinney
City of McKinneyNone above limits1.65 ppb
Frisco ZIP codes (4)
  • 75033
  • 75034
  • 75035
  • 75036

Questions

Is Frisco tap water safe to drink?

City of Frisco 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 Frisco, TX?

3 public water systems serve parts of Frisco. The largest is City of Frisco (231,910 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Frisco tap water have PFAS?

City of Frisco had 4 PFAS detected at least once in EPA's 2023–2025 testing, all with averages below the federal limits.

Do Frisco homes have lead pipes?

Census estimates put 2% of Frisco 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. City of Frisco'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.