Is Duncanville, 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 Duncanville. 5 PFAS were detected below the limits.
City of Duncanville supplies Duncanville (39,413 people).
Water system
City of Duncanville
39,413 people · Purchased surface water · EPA ID TX0570007
Buys treated water from Dallas Water Utility.
| PFAS | Highest average | Limit |
|---|---|---|
| PFOA Not detected | – | 4 ppt |
| PFOS One sample above limit | 1.1 ppt | 4 ppt |
| PFHxS Not detected | – | 10 ppt |
| PFNA Not detected | – | 10 ppt |
| HFPO-DA (GenX) Not detected | – | 10 ppt |
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: 1.1 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
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.
Duncanville homes and lead pipes
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 Duncanville city (tables B25034, B25003). Estimates for small places have a margin of error.
How nearby cities compare
| City | PFAS | Lead (90th pct.) |
|---|---|---|
| DeSoto 4 mi City of Desoto | None above limits | 0 ppb |
| Cedar Hill 5 mi City of Cedar Hill | None above limits | 0 ppb |
| Grand Prairie 7 mi City of Grand Prairie | Above limit | 1.2 ppb |
| Lancaster 9 mi Rockett Special Utility District | None above limits | 0 ppb |
| Arlington 13 mi City of Arlington | None above limits | 1.17 ppb |
| Midlothian 13 mi Johnson County Special Utility District | None above limits | 4.24 ppb |
Duncanville ZIP codes (2)
- 75116
- 75137
Questions
Is Duncanville tap water safe to drink?
City of Duncanville 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 Duncanville, TX?
City of Duncanville, which serves 39,413 people.
Does Duncanville tap water have PFAS?
City of Duncanville had 5 PFAS detected at least once in EPA's 2023–2025 testing, all with averages below the federal limits.
Do Duncanville homes have lead pipes?
Census estimates put 58% of Duncanville 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 Duncanville'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.