What was found in Dallas'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 |
|---|---|---|---|
| Nitrate | 1500 µg/L 15% of the EPA limit 10000 µg/L Main supplier: DALLAS, TOWN OF · 8,212 people · 2019
Highest in the city: 8350 µg/L — HICKORY GROVE MHP · 69 people · 2019 | 14/16 | SYR4 |
| Nitrate-Nitrite | 6910 µg/L 69% of the EPA limit 10000 µg/L Highest in the city: MCCONNELL S/D · 124 people · 2015 | 8/16 | SYR4 |
| Fluoride | 1900 µg/L 48% of the EPA limit 4000 µg/L Main supplier: DALLAS, TOWN OF · 8,212 people · 2019
Highest in the city: 2800 µg/L — HOYLE`S CREEK MHP · 147 people · 2019 | 11/16 | SYR4 |
| Copper | 172.5 µg/L 13% of the EPA limit 1300 µg/L Main supplier: DALLAS, TOWN OF · 8,212 people · 2019
Highest in the city: 1036.15 µg/L — CEDAR VALLEY · 66 people · 2017 | 14/16 | SYR4 |
| Barium | 26.1 µg/L 1.3% of the EPA limit 2000 µg/L Main supplier: DALLAS, TOWN OF · 8,212 people · 2019
Highest in the city: 424.1 µg/L — CEDARWOOD ACRES · 162 people · 2019 | 2/16 | SYR4 |
| Monochloroacetic Acid | 180.4 µg/L No EPA limit set Main supplier: DALLAS, TOWN OF · 8,212 people · 2019 | 2/16 | SYR4 |
| TTHM | 86.475 µg/L 108% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: DALLAS, TOWN OF · 8,212 people · 2019 | 5/16 | SYR4 |
| Total Haloacetic Acids (HAA5) | 73.79 µg/L 123% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: DALLAS, TOWN OF · 8,212 people · 2019 | 3/16 | SYR4 |
| Chloroform | 68.85 µg/L No EPA limit set Main supplier: DALLAS, TOWN OF · 8,212 people · 2019 | 5/16 | SYR4 |
| Dichloroacetic Acid | 43.06 µg/L No EPA limit set Main supplier: DALLAS, TOWN OF · 8,212 people · 2019 | 3/16 | SYR4 |
| Lead | 4 µg/L 27% of the EPA limit 15 µg/L Main supplier: DALLAS, TOWN OF · 8,212 people · 2019
Highest in the city: 31 µg/L — SPENCER MOUNTAIN VILLAGE · 442 people · 2019 | 12/16 | SYR4 |
| Trichloroacetic Acid | 25.98 µg/L No EPA limit set Main supplier: DALLAS, TOWN OF · 8,212 people · 2019 | 3/16 | SYR4 |
| Combined Uranium | 23.1993 µg/L 77% of the EPA limit 30 µg/L Highest in the city: WIMBLEDON S/D · 107 people · 2019 | 6/16 | SYR4 |
| Bromodichloromethane | 17.5 µg/L No EPA limit set Main supplier: DALLAS, TOWN OF · 8,212 people · 2019
Highest in the city: 22.07 µg/L — SPENCER MOUNTAIN VILLAGE · 442 people · 2019 | 2/16 | SYR4 |
| Dibromochloromethane | 16.4 µg/L No EPA limit set Main supplier: DALLAS, TOWN OF · 8,212 people · 2019
Highest in the city: 19.32 µg/L — SPENCER MOUNTAIN VILLAGE · 442 people · 2019 | 2/16 | SYR4 |
| Xylenes, Total | 0.8100 µg/L 0% of the EPA limit 10000 µg/L Main supplier: DALLAS, TOWN OF · 8,212 people · 2019
Highest in the city: 11.48 µg/L — COLLEGE PARK SD · 208 people · 2019 | 3/16 | SYR4 |
| Gross Beta Particle Activity | 11.04 pCi/L No EPA limit set Highest in the city: WIMBLEDON S/D · 107 people · 2019 | 7/16 | SYR4 |
| Dibromoacetic Acid | 7.775 µg/L No EPA limit set Main supplier: DALLAS, TOWN OF · 8,212 people · 2019 | 3/16 | SYR4 |
| Arsenic | 7.248 µg/L 72% of the EPA limit 10 µg/L Highest in the city: HOYLE`S CREEK MHP · 147 people · 2017 | 1/16 | SYR4 |
| Bromoform | 6.44 µg/L No EPA limit set Main supplier: DALLAS, TOWN OF · 8,212 people · 2019 | 2/16 | SYR4 |
| Gross Alpha, Excl. Radon And U | 5.885 pCi/L 39% of the EPA limit 15 pCi/L Highest in the city: DONNA-LYNN MHP · 149 people · 2019 | 2/16 | SYR4 |
| Toluene | 5.8 µg/L 0.6% of the EPA limit 1000 µg/L Highest in the city: GALLAGHER TRAILS S/D · 109 people · 2019 | 1/16 | SYR4 |
| Monobromoacetic Acid | 5.386 µg/L No EPA limit set Main supplier: DALLAS, TOWN OF · 8,212 people · 2019 | 2/16 | SYR4 |
| Ethylbenzene | 2.25 µg/L 0.3% of the EPA limit 700 µg/L Highest in the city: COLLEGE PARK SD · 208 people · 2019 | 2/16 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.8 µg/L 30% of the EPA limit 6 µg/L Highest in the city: MCCONNELL S/D · 124 people · 2019 | 1/16 | SYR4 |
| Combined Radium (-226 And -228) | 1.77 pCi/L 35% of the EPA limit 5 pCi/L Highest in the city: HOYLE`S CREEK MHP · 147 people · 2019 | 6/16 | SYR4 |
| Thallium, Total | 1.4 µg/L 70% of the EPA limit 2 µg/L Main supplier: DALLAS, TOWN OF · 8,212 people · 2019 | 1/16 | SYR4 |
| Antimony, Total | 1.3 µg/L 22% of the EPA limit 6 µg/L Main supplier: DALLAS, TOWN OF · 8,212 people · 2019 | 1/16 | SYR4 |
| Dichloromethane | 0.6600 µg/L 13% of the EPA limit 5 µg/L Highest in the city: GALLAGHER TRAILS S/D · 109 people · 2019 | 1/16 | SYR4 |
| Chlordane | 0.5893 µg/L 29% of the EPA limit 2 µg/L Highest in the city: MCCONNELL S/D · 124 people · 2019 | 1/16 | SYR4 |
| Asbestos | 0.2000 MFL 2.9% of the EPA limit 7 MFL Main supplier: DALLAS, TOWN OF · 8,212 people · 2012 | 1/16 | SYR4 |
| Heptachlor Epoxide | 0.0651 µg/L 33% of the EPA limit 0.2000 µg/L Highest in the city: WINNINGFIELD S/D · 30 people · 2019 | 3/16 | SYR4 |
| Pfpea | 0.0085 µg/L No EPA limit set Main supplier: DALLAS, TOWN OF · 8,212 people · 2023 | 1/16 | UCMR-5 |
| Pfhxa | 0.0082 µg/L No EPA limit set Main supplier: DALLAS, TOWN OF · 8,212 people · 2023 | 1/16 | UCMR-5 |
| Pfba | 0.0077 µg/L No EPA limit set Main supplier: DALLAS, TOWN OF · 8,212 people · 2023 | 1/16 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: DALLAS, TOWN OF · 8,212 people · 2025
Highest in the city: 0.0060 mg/L — WINDSOR HEIGHTS MHP · 178 people · 2025 | 16/16 | LCR |
| PFOA | 0.0044 µg/L No EPA limit set Main supplier: DALLAS, TOWN OF · 8,212 people · 2023 | 1/16 | UCMR-5 |
| PFBS | 0.0039 µg/L No EPA limit set Main supplier: DALLAS, TOWN OF · 8,212 people · 2023 | 1/16 | UCMR-5 |
| Pfhpa | 0.0031 µg/L No EPA limit set Main supplier: DALLAS, TOWN OF · 8,212 people · 2023 | 1/16 | UCMR-5 |
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 Dallas
| Supplier | Population served |
|---|---|
| DALLAS, TOWN OF | 8,212 |
| SPENCER MOUNTAIN VILLAGE | 442 |
| COLLEGE PARK SD | 208 |
| WINDSOR HEIGHTS MHP | 178 |
| CEDARWOOD ACRES | 162 |
| DONNA-LYNN MHP | 149 |
| HOYLE`S CREEK MHP | 147 |
| MCCONNELL S/D | 124 |
| GALLAGHER TRAILS S/D | 109 |
| WIMBLEDON S/D | 107 |
| FOREST HILL MHP | 89 |
| GLENNBURN S/D | 73 |
| HICKORY GROVE MHP | 69 |
| CEDAR VALLEY | 66 |
| KNOLLWOOD S/D | 46 |
| WINNINGFIELD S/D | 30 |
Frequently asked questions about Dallas tap water
Is Dallas tap water safe to drink?
EPA testing detected 39 contaminants in the water serving Dallas. 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 Dallas?
16 public water suppliers report drinking-water monitoring for Dallas, North Carolina to the EPA. Each is listed above with its population served.
What contaminants are in Dallas's water?
The contaminants EPA monitoring detected in Dallas include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium. 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.