Water Quality: Dallas, TX
27 water systems • 1,438,601 people served
Multiple Health ViolationsWater Quality Summary
Dallas is served by 27 public water systems with a combined service population of 1,438,601 people, and has 520 EPA Safe Drinking Water Act violations on record. Critically, 120 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Dallas's violation count is 145% above the national average for Texas. Contaminants associated with violations include Bromate, Disinfection Byproducts, Selenium, Stage 2 DBP, TTHM.
Contaminants Found
Probable human carcinogen that increases the risk of kidney and thyroid cancers.
Common source: Ozonation of bromide-containing water; used as flour improver
EPA limit: 0.010 mg/L (10 ppb)
Broad category of chemicals formed during disinfection, associated with increased cancer risk and adverse reproductive effects.
Common source: Reaction of disinfectants (chlorine, ozone, chloramines) with organic matter
Hair loss, nail brittleness, and nervous system damage at elevated concentrations.
Common source: Natural geological deposits, mining discharges, oil refinery waste
EPA limit: 0.05 mg/L (50 ppb)
Trihalomethanes and haloacetic acids that increase cancer risk and may cause adverse reproductive outcomes.
Common source: Chlorine disinfection reacting with natural organic matter in source water
EPA limit: TTHM: 0.080 mg/L; HAA5: 0.060 mg/L
Total trihalomethanes are linked to increased risk of bladder cancer and adverse reproductive outcomes.
Common source: Reaction of chlorine disinfectants with naturally occurring organic matter in water
EPA limit: 0.080 mg/L (80 ppb)
Water Systems Serving Dallas
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| DALLAS WATER UTILITY | TX0570004 | Surface Water | 1,356,479 | 1 |
| CITY OF UNIVERSITY PARK | TX0570061 | Surface Water | 25,278 | 0 |
| KAUFMAN COUNTY FWSD 1A | TX1290043 | Surface Water | 11,268 | 32 |
| TOWN OF HIGHLAND PARK | TX0570049 | Surface Water | 8,959 | 1 |
| KAUFMAN COUNTY FWSD 4A | TX1290056 | Surface Water | 7,317 | 5 |
| KAUFMAN COUNTY MUD 14 | TX1290053 | Surface Water | 6,432 | 4 |
| FRISCO WEST WCID | TX0610253 | Surface Water | 5,805 | 20 |
| CITY OF COCKRELL HILL | TX0570038 | Surface Water | 3,820 | 8 |
| KAUFMAN COUNTY MUD 11 | TX1290046 | Surface Water | 3,774 | 7 |
| KAUFMAN COUNTY FWSD 4B | TX1290057 | Surface Water | 1,830 | 9 |
| KAUFMAN COUNTY MUD 9 | TX1290058 | Surface Water | 1,473 | 5 |
| KAUFMAN COUNTY MUD 12 | TX1290047 | Surface Water | 1,383 | 6 |
| LAJITAS ON THE RIO GRANDE | TX0220018 | Groundwater | 942 | 18 |
| CRESSON CROSSROADS MUD 2 | TX1110128 | Groundwater | 888 | 63 |
| LAKE VIEW MGMT & DEVELOPMENT DIST LONG C | TX1070254 | Groundwater | 684 | 13 |
| ROLLING V RANCH WCID 3 OF WISE COUNTY | TX2490098 | Surface Water | 576 | 0 |
| NEW FAIRVIEW MUD 1 | TX2490092 | Groundwater | 537 | 0 |
| CLEARWATER DISTRIBUTION | TX1020063 | Groundwater | 303 | 137 |
| D BAR B MOBILE HOME RANCH | TX0570082 | Groundwater | 267 | 129 |
| DALLAS COUNTY MUD 4 | TX0570186 | Surface Water | 150 | 0 |
| HILLCREST NORTH MUD | TX2490095 | Groundwater | 114 | 0 |
| LANDING AT HICKORY RIDGE | TX0010055 | Groundwater | 87 | 28 |
| LONE OAK CABINS | TX0720061 | Groundwater | 78 | 30 |
| EAGLE RIDGE MUD | TX1840221 | Groundwater | 57 | 1 |
| WALDEN POND FWSD OF KAUFMAN COUNTY | TX1290055 | Surface Water | 55 | 0 |
| CRESSON CROSSROADS MUD 2 KELLY RANCH | TX1840225 | Groundwater | 45 | 0 |
| DALLAS COUNTY PARK CITIES MUD | TX0570078 | Surface Water | 0 | 3 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Other Cities in Texas
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.