What was found in Grand Prairie's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Fluoride | 1081 µg/L 27% of the EPA limit 4000 µg/L Highest in the city: MATTHEW ROAD WSC · 279 people · 2018 | 1/2 | SYR4 |
| Copper | 375.2 µg/L 29% of the EPA limit 1300 µg/L Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2018 | 2/2 | SYR4 |
| Nitrate | 84.5 µg/L 0.8% of the EPA limit 10000 µg/L Highest in the city: MATTHEW ROAD WSC · 279 people · 2019 | 1/2 | SYR4 |
| Nitrate-Nitrite | 69.15 µg/L 0.7% of the EPA limit 10000 µg/L Highest in the city: MATTHEW ROAD WSC · 279 people · 2019 | 1/2 | SYR4 |
| TTHM | 35.045 µg/L 44% of the EPA limit 80 µg/L Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 24.375 µg/L 41% of the EPA limit 60 µg/L Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 17.24 µg/L No EPA limit set Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2019 | 2/2 | SYR4 |
| Chloroform | 12.855 µg/L No EPA limit set Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 12.41 µg/L No EPA limit set Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2019 | 2/2 | SYR4 |
| Lithium | 12.1 µg/L No EPA limit set Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2025 | 1/2 | UCMR-5 |
| Dibromochloromethane | 9.2925 µg/L No EPA limit set Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2019 | 2/2 | SYR4 |
| Lead | 6.8955 µg/L 46% of the EPA limit 15 µg/L Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2018 | 2/2 | SYR4 |
| Monochloroacetic Acid | 6.64 µg/L No EPA limit set Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 6.16 µg/L No EPA limit set Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2019 | 2/2 | SYR4 |
| Bromoform | 5.202 µg/L No EPA limit set Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 3.5 µg/L No EPA limit set Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 3.175 µg/L No EPA limit set Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2019 | 1/2 | SYR4 |
| Chromium | 3.06 µg/L 3.1% of the EPA limit 100 µg/L Highest in the city: MATTHEW ROAD WSC · 279 people · 2018 | 1/2 | SYR4 |
| Selenium | 1.5 µg/L 3% of the EPA limit 50 µg/L Highest in the city: MATTHEW ROAD WSC · 279 people · 2018 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 1 pCi/L 20% of the EPA limit 5 pCi/L Highest in the city: MATTHEW ROAD WSC · 279 people · 2012 | 1/2 | SYR4 |
| Barium | 0.9100 µg/L 0% of the EPA limit 2000 µg/L Highest in the city: MATTHEW ROAD WSC · 279 people · 2018 | 1/2 | SYR4 |
| PFOS | 0.0820 µg/L No EPA limit set Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2025 | 1/2 | UCMR-5 |
| Pfba | 0.0122 µg/L No EPA limit set Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2025 | 1/2 | UCMR-5 |
| Pfpea | 0.0117 µg/L No EPA limit set Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2025 | 1/2 | UCMR-5 |
| Pfhxa | 0.0115 µg/L No EPA limit set Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2025 | 1/2 | UCMR-5 |
| PFBS | 0.0051 µg/L No EPA limit set Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2025 | 1/2 | UCMR-5 |
| PFOA | 0.0049 µg/L No EPA limit set Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2025 | 1/2 | UCMR-5 |
| Pfhpa | 0.0036 µg/L No EPA limit set Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2025 | 1/2 | UCMR-5 |
| PFHXS | 0.0033 µg/L No EPA limit set Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2025 | 1/2 | UCMR-5 |
| Lead | 0.0012 mg/L 8% of the EPA limit 0.0150 mg/L Main supplier: CITY OF GRAND PRAIRIE · 201,843 people · 2024 | 2/2 | LCR |
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Grand Prairie
| Supplier | Population served |
|---|---|
| CITY OF GRAND PRAIRIE | 201,843 |
| MATTHEW ROAD WSC | 279 |
Frequently asked questions about Grand Prairie tap water
Is Grand Prairie tap water safe to drink?
EPA testing detected 30 contaminants in the water serving Grand Prairie. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Grand Prairie?
2 public water suppliers report drinking-water monitoring for Grand Prairie, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Grand Prairie's water?
The contaminants EPA monitoring detected in Grand Prairie include Fluoride, Copper, Nitrate, Nitrate-Nitrite, TTHM. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.