Drinking water quality · 2024
· Verified
What's in Dallas, TX tap water
53 contaminants were measured in the Dallas, TX water system's 2024 annual report. Each is shown below against its federal limit.
- Reporting year
- 2024
- Contaminants measured
- 53
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- TX
PFAS — EPA UCMR5 (2023–2025)
2 PFAS compounds above EPA limits in Dallas, TX
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
PFOA (Perfluorooctanoic acid)
● Over EPA limit (1.6×)below national p90 (13.649999999999999 ng/L across detecting U.S. systems)
PFOS (Perfluorooctane sulfonic acid)
● Over EPA limit (1.3×)below national p90 (19.900000000000006 ng/L across detecting U.S. systems)
PFHxS (Perfluorohexane sulfonic acid)
● Below limitbelow national p90 (12.049999999999997 ng/L across detecting U.S. systems)
PFHpA
● Detected (no federal limit)near national p90 (9.309999999999999 ng/L across detecting U.S. systems)
PFHxA
● Detected (no federal limit)above national p90 (12.190000000000003 ng/L across detecting U.S. systems)
PFBS
● Detected (no federal limit)near national p90 (13.909999999999979 ng/L across detecting U.S. systems)
PFBA
● Detected (no federal limit)near national p90 (18 ng/L across detecting U.S. systems)
PFPeA
● Detected (no federal limit)above national p90 (15.95999999999999 ng/L across detecting U.S. systems)
Where your water comes from · EPA SDWIS
Dallas, TX's drinking water comes from surface water, drawn from 5 sources.
Source
- INTAKE 5 - LAKE FORK
- INTAKE 4 - ELM FORK TRINITY R / ELM FORK
- INTAKE 2 - RAY HUBBARD
- INTAKE 3 - ELM FORK TRINITY R / BACHMAN
- + 1 more
Treatment
- SWTP - BACHMAN - 2605 SHORECREST
- SWTP - EAST SIDE - 405 LONG CREEK RD
- SWTP - ELM FORK - 1440 WHITLOCK LN
Distribution
Historical readings · EPA Six-Year Review (2012–2019)
2 contaminants historically over EPA limits in Dallas, TX
Every U.S. public water system reports compliance-monitoring data to EPA. The Six-Year Review releases the 2012–2019 window as a single dataset — here's what your system reported, year by year. Values shown are the highest detection per analyte per year, compared to the federal MCL.
| Contaminant | Worst detection | EPA limit | Years (2012–2019) |
|---|---|---|---|
GROSS BETA worst: 2017 | 6.6 mrem/yr 1.6× | 4 mrem/yr | '17 |
BROMATE worst: 2019 | 0.013 mg/L 1.3× | 0.01 mg/L | '16'17'18'19 |
CYANIDE worst: 2016 | 0.164 mg/L 82% above national p90 | 0.2 mg/L | '14'15'16'18 |
TTHM worst: 2019 | 0.0636 mg/L within | 0.08 mg/L | '12'13'14'15'16'17'18'19 |
HAA5 worst: 2019 | 0.0331 mg/L within | 0.06 mg/L | '12'13'14'15'16'17'18'19 |
DEHP worst: 2016 | 0.0027 mg/L within | 0.006 mg/L | '14'16 |
FLUORIDE worst: 2016 | 1.02 mg/L within | 4 mg/L | '12'13'14'15'16'17'18'19 |
ARSENIC worst: 2013 | 0.00209 mg/L within below national p90 | 0.01 mg/L | '13'14'15'16 |
NITRATE worst: 2014 | 1.62 mg/L within | 10 mg/L | '12'13'14'15'16'17'18'19 |
ATRAZINE worst: 2015 | 0.0003 mg/L within below national p90 | 0.003 mg/L | '12'13'14'15'17'18'19 |
SIMAZINE worst: 2012 | 0.00037 mg/L within | 0.004 mg/L | '12'13'14'15'18 |
SELENIUM worst: 2013 | 0.00408 mg/L within | 0.05 mg/L | '13'14'15 |
ANTIMONY worst: 2015 | 0.00032 mg/L within below national p90 | 0.006 mg/L | '15'16 |
CHROMIUM worst: 2014 | 0.00376 mg/L within below national p90 | 0.1 mg/L | '13'14'15'16'17'18 |
NITRITE worst: 2013 | 0.0315 mg/L within | 1 mg/L | '13 |
BARIUM worst: 2015 | 0.041 mg/L within below national p90 | 2 mg/L | '13'14'15'16'17'18'19 |
MBAA worst: 2012 | 0.0054 mg/L | — | '12'13'14'15'16'17'18'19 |
COPPER worst: 2012 | 1.15 mg/L above national p90 | — | '12'13'14'15'16'17'18 |
LEAD worst: 2012 | 0.0031 mg/L | — | '12'15'18 |
DBAA worst: 2012 | 0.0021 mg/L | — | '12'13'14'15'16'17'18'19 |
DCAA worst: 2012 | 0.0112 mg/L | — | '12'13'14'15'16'17'18'19 |
MCAA worst: 2012 | 0.0063 mg/L | — | '12'13'14'15'16'17'18'19 |
TCAA worst: 2012 | 0.0022 mg/L | — | '12'13'14'15'16'17'18'19 |
BROMODICHLOROMETHANE worst: 2012 | 0.0069 mg/L | — | '12'13'14'15'16'17'18'19 |
BROMOFORM worst: 2012 | 0.0011 mg/L | — | '12'13'14'15'17'18'19 |
CHLOROFORM worst: 2012 | 0.0077 mg/L | — | '12'13'14'15'16'17'18'19 |
DIBROMOCHLOROMETHANE worst: 2012 | 0.0045 mg/L | — | '12'13'14'15'16'17'18'19 |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 2.97 mg/LAverageSystem-wide | 4 mg/LMCL | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| AluminumA common element sometimes used as a treatment coagulant. | 0.006 mg/LAverageSystem-wide | 0.05 mg/LMCL | Within the limit |
| ManganeseA naturally occurring metal from soil and rock. | 2.7 ug/LAverageSystem-wide | 50 ug/LMCL | Within the limit |
| MercuryA toxic metal from erosion of natural deposits and industrial runoff. | 0.08 ug/LAverageSystem-wide | 2 ug/LMCL | Within the limit |
| LithiumA naturally occurring element found in some groundwater. | Not detected ng/LMaximumSystem-wide | None set | None detected |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 3.27 mg/LAverageSystem-wide | 35 mg/LMCL | Within the limit |
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid, a chlorinated PFAS compound. | Not detected ng/LMinimumSystem-wide | None set | None detected |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)ADONA, a newer-generation PFAS replacement compound. | Not detected ng/LAverageSystem-wide | None set | None detected |
| 4:2 Fluorotelomer sulfonic acid (4:2 FTS)4:2 fluorotelomer sulfonic acid, a PFAS-related compound. | Not detected ng/LMaximumSystem-wide | None set | None detected |
| 6:2 Fluorotelomer sulfonic acid (6:2 FTS)6:2 fluorotelomer sulfonic acid, a PFAS-related compound. | Not detected ng/LAverageSystem-wide | None set | None detected |
| 8:2 Fluorotelomer sulfonic acid (8:2 FTS)8:2 fluorotelomer sulfonic acid, a PFAS-related compound. | Not detected ng/LAverageSystem-wide | None set | None detected |
| 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid, a chlorinated PFAS compound. | Not detected ng/LMaximumSystem-wide | None set | None detected |
| Hexafluoropropylene oxide dimer acidHFPO-DA ('GenX chemicals'), a newer-generation PFAS replacement compound. | Not detected ng/LAverageSystem-wide | None set | None detected |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)N-ethyl perfluorooctanesulfonamidoacetic acid, a PFAS-related compound. | Not detected ng/LMinimumSystem-wide | None set | None detected |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)N-methyl perfluorooctanesulfonamidoacetic acid, a PFAS-related compound. | Not detected ng/LMinimumSystem-wide | None set | None detected |
| Nonafluoro-3,6-dioxaheptanoic acidNonafluoro-3,6-dioxaheptanoic acid, a PFAS-related compound. | Not detected ng/LMaximumSystem-wide | None set | None detected |
| Perfluoro-3-methoxypropanoic acid (PFMPA)Perfluoro-3-methoxypropanoic acid, a PFAS-related compound. | Not detected ng/LMinimumSystem-wide | None set | None detected |
| Perfluoro-4-methoxybutanoic acid (PFMBA)Perfluoro-4-methoxybutanoic acid, a PFAS-related compound. | Not detected ng/LMinimumSystem-wide | None set | None detected |
| Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)Perfluoro(2-ethoxyethane)sulfonic acid, a PFAS-related compound. | Not detected ng/LMaximumSystem-wide | None set | None detected |
| Perfluorodecanoic acid (PFDA)Perfluorodecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected ng/LMinimumSystem-wide | None set | None detected |
| Perfluorododecanoic acid (PFDoA)Perfluorododecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected ng/LMinimumSystem-wide | None set | None detected |
| Perfluoroheptanesulfonic acid (PFHpS)Perfluoroheptanesulfonic acid, a PFAS 'forever chemical.' | Not detected ng/LMinimumSystem-wide | None set | None detected |
| Perfluorononanoic acidPerfluorononanoic acid, a PFAS 'forever chemical.' | Not detected ng/LMaximumSystem-wide | None set | None detected |
| Perfluoropentanesulfonic acid (PFPeS)Perfluoropentanesulfonic acid, a PFAS 'forever chemical.' | Not detected ng/LMaximumSystem-wide | None set | None detected |
| Perfluorotetradecanoic acid (PFTeDA)Perfluorotetradecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected ng/LMaximumSystem-wide | None set | None detected |
| Perfluorotridecanoic acid (PFTrDA)Perfluorotridecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected ng/LMinimumSystem-wide | None set | None detected |
| Perfluoroundecanoic acid (PFUnA)Perfluoroundecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected ng/LAverageSystem-wide | None set | None detected |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 1.3 %MaximumSystem-wide | None set | Detected — no federal limit |
People also ask about Dallas, TX's water
+Is Dallas, TX tap water safe to drink in 2024?
Every one of the 53 contaminants measured in Dallas, TX's 2024 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Dallas, TX tap water?
53 contaminants were measured in Dallas, TX's 2024 Consumer Confidence Report, spanning pfas ("forever chemicals"), disinfection byproducts, and metals. 22 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Where does the data on this page come from?
Every value is transcribed from Dallas, TX's 2024 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Dallas, TX's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2024 report; a new report will replace it once the utility publishes its next annual update.