Tap Water Quality Report
Tap water quality in Dallas, Texas
Tap water in Dallas, Texas receives a grade of D (61/100) from TapWaterSafety.org. It's served by DALLAS WATER UTILITY. The most significant water quality concerns are: PFAS contamination; Perfluorohexane sulfonate (PFHXS) significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline; Bromochloroacetic acid significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in Dallas's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving Dallas.
PFAS contamination
Severe concernPerfluorooctane sulfonate (PFOS), Perfluorooctanoic acid (PFOA) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Perfluorohexane sulfonate (PFHXS) significantly above health guideline
Moderate concernPerfluorohexane sulfonate (PFHXS) detected at 0.867 ppt, 867x above the EWG health guideline of 0.001 ppt.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 10.9 ppb, 181x above the EWG health guideline of 0.06 ppb.
Bromochloroacetic acid significantly above health guideline
Moderate concernBromochloroacetic acid detected at 2.86 ppb, 143x above the EWG health guideline of 0.02 ppb.
EPA compliance record
Official U.S. EPA records for DALLAS WATER UTILITY (system ID TX0570004) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Recommended filters for Dallas
Filters matched to the specific contaminants in Dallas's water supply.
Filter certified for PFOA/PFOS (NSF/ANSI 53 or 58)
$180-$750Reverse osmosis and some carbon block filters reduce PFAS. Look for certification to NSF/ANSI 53 or 58 for PFOA/PFOS.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in Dallas's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Perfluorohexane sulfonate (PFHXS) PFAS |
0.867 ppt | 0.001 | 10.0 | — | — | — | — | 867× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
10.9 ppb | 0.06 | — | — | — | — | — | 181× over |
| Bromochloroacetic acid Disinfection byproduct |
2.86 ppb | 0.02 | — | — | — | — | — | 143× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
14.1 ppb | 0.15 | 80.0 | 100 | — | — | — | 94× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
7.46 ppb | 0.1 | 60.0 | 60 | — | — | — | 75× over |
| Bromodichloromethane Disinfection byproduct |
4.41 ppb | 0.06 | — | — | — | — | — | 73× over |
| Dibromoacetic acid Disinfection byproduct |
1.7 ppb | 0.03 | — | — | — | — | — | 57× over |
| Dibromochloromethane Disinfection byproduct |
4.35 ppb | 0.1 | — | — | — | — | — | 44× over |
| Bromate Disinfection byproduct |
2.38 ppb | 0.1 | 10.0 | 10 | 10 | 0.1 | — | 24× over |
| Dichloroacetic acid Disinfection byproduct |
4.33 ppb | 0.2 | — | — | — | — | — | 22× over |
| Perfluorooctanoic acid (PFOA) PFAS |
1.6 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | 18× over |
| Chromium (hexavalent) Heavy metal |
0.275 ppb | 0.02 | — | — | — | — | — | 14× over |
| Chloroform Disinfection byproduct |
3.87 ppb | 0.4 | — | — | — | — | — | 9.7× over |
| Nitrate Inorganic |
0.69 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 4.9× over |
| Trichloroacetic acid Disinfection byproduct |
0.413 ppb | 0.1 | — | — | — | — | — | 4.1× over |
| Bromoform Disinfection byproduct |
1.4 ppb | 0.5 | — | — | — | — | — | 2.8× over |
| Perfluorooctane sulfonate (PFOS) PFAS |
0.792 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | 2.6× over |
| Atrazine Pesticide/Herbicide |
0.111 ppb | 0.1 | 3.0 | 0.1 | 100 | 0.15 | — | Fails EU |
| Simazine Pesticide/Herbicide |
0.0844 ppb | 0.1 | 4.0 | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
12.6 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
31.1 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Molybdenum Other |
1.7 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Aluminum Heavy metal |
11.4 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.913 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
9.75 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
9.16 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
8.79 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.117 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.101 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.376 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
4.67 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Perfluoroheptanoic acid (PFHPA) PFAS |
1.32 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.305 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Acetone Other |
6.38 ppb | — | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
0.544 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Cyanide Inorganic |
95.5 ppb | — | 200.0 | 50 | 70 | 150 | — | Fails EU |
| Fluoride Inorganic |
0.651 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Nitrite Inorganic |
0.0058 ppm | — | 1.0 | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from DALLAS WATER UTILITY.
General Contact
Treatment Plant
ZIP codes served
Dallas's public water systems serve the following ZIP codes: