We read 22 results from Dallas Water Utility’s 2025 water quality report. No results over a legal limit; 4 above a health goal or guideline.
Serves about 1,356,479 people · Water system ID TX0570004 · Read the district’s 2025 report (opens in a new tab)
Open this district in the water lookupCompare with your own test results, see the district map and get matched filters.
Results from the 2025 report
Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.
| Contaminant | Result | Health goal | Legal limit | What it means |
|---|---|---|---|---|
| Copper90th percentile of homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 5 | 0.39 ppm | 0.3 ppm | 1.3 ppm (action level) | Above the health goal1.3x the health goal |
| Gross beta (radioactivity)average · range 5.3 to 6.2 · sampled 2023 · System-wide · 2025 report, page 4 | 5.7 pCi/L | 0 pCi/L | 50 pCi/L | Above the health goalThe health goal is zero |
| Lead90th percentile of homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 5 | 1.1 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal5.5x the health goal |
| Total coliform bacteriahighest month · Distribution system · 2025 report, page 6 | 1.8 % positive | 0 % positive | 5 % positive | Above the health goalThe health goal is zero |
| Aluminumaverage · range ND to 0.008 · printed as 5 ppb · System-wide · 2025 report, page 4 | 0.005 ppm | — | 0.2 ppm guideline | Within the guideline |
| Atrazineaverage · range 0.1 to 0.1 · System-wide · 2025 report, page 5 | 0.1 ppb | 0.15 ppb | 3 ppb | Below the health goal |
| Bariumaverage · range 0.04 to 0.04 · System-wide · 2025 report, page 4 | 0.04 ppm | 2 ppm | 2 ppm | Below the health goal |
| Bromateaverage · System-wide · 2025 report, page 5 | Not detected | 0.1 ppb | 10 ppb | Not detected |
| Chloramineaverage · range 2.75 to 3.18 · Distribution system · 2025 report, page 5 | 2.97 ppm | None set | 4 ppm | Below the legal limit |
| Cyanideaverage · range ND to 76.8 · System-wide · 2025 report, page 4 | 45.2 ppb | 150 ppb | 200 ppb | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 1.4 to 16.4 · Distribution system · 2025 report, page 5 | 15.1 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 6.5 to 21 · Distribution system · 2025 report, page 5 | 19.7 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · range 0.55 to 0.69 · System-wide · 2025 report, page 4 | 0.63 ppm | 1 ppm | 4 ppm | Below the health goal |
| Manganeseaverage · range ND to 0.0068 · printed as 2.27 ppb · System-wide · 2025 report, page 4 | 0.0023 ppm | — | 0.05 ppm guideline | Within the guideline |
| Nitrate (as N)average · range 0.59 to 0.8 · System-wide · 2025 report, page 4 | 0.67 ppm | 10 ppm | 10 ppm | Below the health goal |
| Nitrite (as N)average · range ND to 0.02 · sampled 2022 · System-wide · 2025 report, page 4 | 0.006 ppm | 1 ppm | 1 ppm | Below the health goal |
| Simazineaverage · range ND to 0.08 · System-wide · 2025 report, page 5 | 0.03 ppb | 4 ppb | 4 ppb | Below the health goal |
| Turbidity (cloudiness)highest measured · Water treatment plants · 2025 report, page 6 | 0.16 NTU | None set | 1 NTU | Below the legal limit |
| Bromodichloromethaneaverage · range 3.42 to 5.97 · Distribution system · 2025 report, page 6 | 4.43 ppb | None set | None | No health limit |
| Bromoformaverage · range ND to 1.95 · Distribution system · 2025 report, page 6 | 0.65 ppb | None set | None | No health limit |
| Chloroformaverage · range 1.92 to 8.99 · Distribution system · 2025 report, page 6 | 4.57 ppb | None set | None | No health limit |
| Dibromochloromethaneaverage · range 2.76 to 4.79 · Distribution system · 2025 report, page 6 | 3.5 ppb | None set | None | No health limit |
Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Dallas Water Utility’s water between Mar 2023 and Jan 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA6.3 pptFound in 4 of 12 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFOS5.1 pptFound in 2 of 12 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFHxS3.8 pptFound in 3 of 12 samples · highest resultNo federal limit in force for this one
- PFBS7.6 pptFound in 12 of 12 samples · highest resultNo federal limit in force for this one
Source: EPA UCMR 5 occurrence data. The highest single result is shown; one high sample doesn’t mean every glass is that high.
What you can do
Nothing here is an emergency notice: if the district has a violation, it must tell customers directly. If you’d like to lower these at your tap, these are the treatments that remove them, and the catalog shows the models certified for each. Ranking is by certified removal; commissions never change the order.
Lead
Found: Copper, Lead
What removes it: Reverse osmosis or Certified carbon block or RO.
Radium and uranium
Found: Gross beta (radioactivity)
What removes it: Reverse osmosis.
Bacteria and viruses
Found: Total coliform bacteria
What removes it: UV purification (and tell your utility).
PFAS ("forever chemicals")
Found: PFOA (EPA testing), PFOS (EPA testing)
What removes it: Reverse osmosis.
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