DALLAS WATER UTILITY
High Risk2 PFAS compound(s) exceed EPA Maximum Contaminant Levels
This utility has until 2029 to install treatment under the EPA's April 2024 PFAS rule. In the meantime, a point-of-use filter certified NSF/ANSI 58 for PFOA/PFOS provides reliable interim protection.
8
PFAS Detected
2
Above EPA Limits
53
ZIPs Served
Surface
Water Source
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 6.30ppt | 158% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOS Perfluorooctane sulfonic acid | 5.10ppt | 128% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 3.80ppt | 38% of limit
| 10 ppt | Below limit |
PFPeA Perfluoropentanoic acid | 18.20ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 17.90ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 13.20ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 7.60ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 6.00ppt | No federal limit | — | Unregulated |
ZIP Codes Served by This Utility
75201 75202 75203 75204 75205 75206 75207 75208 75209 75210 75211 75212 75214 75215 75216 75217 75218 75219 75220 75223 75224 75225 75226 75227 75228 75229 75230 75231 75232 75233 75234 75235 75236 75237 75238 75240 75241 75242 75243 75244 75246 75247 75248 75249 75251 75252 75253 75254 75258 75270 75287 75390 75398
Click any ZIP to see the full result page for that area.
About this data
Source
EPA UCMR 5 — January 2026 release
Sampling period
January 2023 – December 2025
Water system ID (PWSID)
TX0570004
Detection threshold (MRL)
~1.5–2 ppt — "Not detected" means below this floor