Tap Water Results

Is Rockwall, 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 Rockwall. 4 PFAS were detected below the limits.

3 public water systems serve parts of Rockwall. The largest, City of Rockwall, serves 55,250 people. Your water bill names your system.

Largest system

City of Rockwall

55,250 people · Purchased surface water · EPA ID TX1990001

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: 1.81 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 Rockwall 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.

Rockwall homes and lead pipes

9%
of homes built before 1980 (Texas 33%, US 50%)
1%
built before 1950 (Texas 6%)
28%
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 Rockwall city (tables B25034, B25003). Estimates for small places have a margin of error.

Other water systems serving Rockwall

  • Bear Creek Special Utility District
    15,822 people · Purchased surface water · Texas · reported ZIPs here
    No PFAS above limits
  • Blackland Water Supply Corporation
    6,171 people · Purchased surface water · Texas · reported ZIPs here
    No PFAS above limits

How nearby cities compare

CityMain water systemPFASLead (90th pct.)
Fate 3 mi
City of Fate
City of FateNone above limits1.34 ppb
Rowlett 6 mi
City of Rowlett
City of RowlettNone above limits2.6 ppb
Royse City 8 mi
City of Royse City
City of Royse CityNone above limits1.8 ppb
Sachse 9 mi
City of Sachse
City of SachseNone above limits0 ppb
Wylie 9 mi
City of Wylie
City of WylieNone above limits1.03 ppb
Garland 11 mi
City of Garland
City of GarlandNone above limits1.22 ppb
Rockwall ZIP codes (2)
  • 75032
  • 75087

Questions

Is Rockwall tap water safe to drink?

City of Rockwall 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 Rockwall, TX?

3 public water systems serve parts of Rockwall. The largest is City of Rockwall (55,250 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Rockwall tap water have PFAS?

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

Do Rockwall homes have lead pipes?

Census estimates put 9% of Rockwall 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 Rockwall'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.