We read 20 results from City of Grand Prairie’s 2025 water quality report. No results over a legal limit; 8 above a health goal or guideline.
Serves about 201,843 people · Water system ID TX0570048 · 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 |
|---|---|---|---|---|
| Arsenichighest measured · range ND to 1.1 · Fort Worth supply · 2025 report, page 6 | 1.1 ppb | 0.004 ppb | 10 ppb | Above the health goal275x the health goal |
| Bromatehighest running annual average · range ND to 13.7 · Fort Worth supply · 2025 report, page 6 | 6.17 ppb | 0.1 ppb | 10 ppb | Above the health goal62x the health goal |
| Chloritehighest measured · range 0.04 to 0.27 · Mansfield supply · 2025 report, page 6 | 0.27 ppm | 0.05 ppm | 1 ppm | Above the health goal5.4x the health goal |
| Cyanidehighest measured · range ND to 168 · Fort Worth supply, highest of 2 sources · 2025 report, page 6 | 168 ppb | 150 ppb | 200 ppb | Above the health goal1.1x the health goal |
| Gross beta (radioactivity)average · range 7.5 to 7.5 · sampled 2024 · Fort Worth supply · 2025 report, page 6 | 7.5 pCi/L | 0 pCi/L | 50 pCi/L | Above the health goalThe health goal is zero |
| Lead90th percentile of 50 homes tested · sampled 2024 · Customer taps (50 sites) · 2025 report, page 5 | 1.2 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal6x the health goal |
| Total coliform bacteriahighest month · Grand Prairie distribution system · 2025 report, page 5 | 1.53 % positive | 0 % positive | 5 % positive | Above the health goalThe health goal is zero |
| Uraniumaverage · range 1.6 to 1.6 · sampled 2024 · Fort Worth supply · 2025 report, page 6 | 1.6 ppb | 0.6 ppb | 30 ppb | Above the health goal2.7x the health goal |
| Bariumhighest measured · range 0.05 to 0.07 · Fort Worth supply · 2025 report, page 6 | 0.07 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloramineaverage · range 0.6 to 4.7 · Grand Prairie distribution system · 2025 report, page 5 | 2.95 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 50 homes tested · sampled 2024 · Customer taps (50 sites) · 2025 report, page 5 | 0.25 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 4.6 to 24.3 · Grand Prairie distribution system · 2025 report, page 5 | 30.3 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 13.6 to 36.2 · Grand Prairie distribution system · 2025 report, page 5 | 44.7 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.21 to 0.74 · Fort Worth supply · 2025 report, page 6 | 0.74 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)highest measured · range 0.03 to 1.15 · Grand Prairie system · 2025 report, page 5 | 1.15 ppm | 10 ppm | 10 ppm | Below the health goal |
| Nitrite (as N)highest measured · range 0.37 to 0.37 · sampled 2024 · Grand Prairie system · 2025 report, page 5 | 0.37 ppm | 1 ppm | 1 ppm | Below the health goal |
| Turbidity (cloudiness)highest measured · Mansfield supply, highest of 2 sources · 2025 report, page 6 | 0.51 NTU | None set | 1 NTU | Below the legal limit |
| Bromodichloromethaneaverage · range 4.47 to 10.6 · Grand Prairie distribution system · 2025 report, page 5 | 6.08 ppb | None set | None | No health limit |
| Bromoformaverage · range ND to 6.78 · Grand Prairie distribution system · 2025 report, page 5 | 1.99 ppb | None set | None | No health limit |
| Chloroformaverage · range 3.11 to 10.5 · Grand Prairie distribution system · 2025 report, page 5 | 4.87 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 City of Grand Prairie’s water between May 2024 and Feb 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA4.9 pptFound in 2 of 20 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFOS82 pptFound in 5 of 20 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFHxS3.3 pptFound in 1 of 20 samples · highest resultNo federal limit in force for this one
- PFBS5.1 pptFound in 9 of 20 samples · highest resultNo federal limit in force for this one
- Lithium12.1 ppbFound in 2 of 20 samples · highest resultAbove EPA’s health reference level of 10 ppb (a guide, not a legal limit)
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.
Disinfection byproducts
Found: Bromate, Chlorite
What removes it: Carbon block.
Radium and uranium
Found: Gross beta (radioactivity), Uranium
What removes it: Reverse osmosis.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
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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