What was found in ZIP 75640
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Copper | 538.4 µg/L 41% of the EPA limit 1300 µg/L Main supplier: DIANA SUD · 7,320 people · 2019
Highest in the ZIP: 1373 µg/L — HARLETON WSC · 4,107 people · 2019 | 2/2 | SYR4 |
| Fluoride | 764.3 µg/L 19% of the EPA limit 4000 µg/L Main supplier: DIANA SUD · 7,320 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 455.25 µg/L 4.6% of the EPA limit 10000 µg/L Main supplier: DIANA SUD · 7,320 people · 2015
Highest in the ZIP: 627.5 µg/L — HARLETON WSC · 4,107 people · 2015 | 2/2 | SYR4 |
| Nitrate | 430 µg/L 4.3% of the EPA limit 10000 µg/L Main supplier: DIANA SUD · 7,320 people · 2019
Highest in the ZIP: 438.7 µg/L — HARLETON WSC · 4,107 people · 2019 | 2/2 | SYR4 |
| Nitrite | 126 µg/L 13% of the EPA limit 1000 µg/L Main supplier: DIANA SUD · 7,320 people · 2015
Highest in the ZIP: 212.95 µg/L — HARLETON WSC · 4,107 people · 2015 | 2/2 | SYR4 |
| TTHM | 44.03 µg/L 55% of the EPA limit 80 µg/L Main supplier: DIANA SUD · 7,320 people · 2019
Highest in the ZIP: 115.5 µg/L — HARLETON WSC · 4,107 people · 2019 | 2/2 | SYR4 |
| Cyanide | 59.98 µg/L 30% of the EPA limit 200 µg/L Main supplier: DIANA SUD · 7,320 people · 2017
Highest in the ZIP: 80.4 µg/L — HARLETON WSC · 4,107 people · 2017 | 2/2 | SYR4 |
| Barium | 45.28 µg/L 2.3% of the EPA limit 2000 µg/L Main supplier: DIANA SUD · 7,320 people · 2019
Highest in the ZIP: 58.55 µg/L — HARLETON WSC · 4,107 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 24.82 µg/L No EPA limit set Main supplier: DIANA SUD · 7,320 people · 2019
Highest in the ZIP: 47.605 µg/L — HARLETON WSC · 4,107 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 44.79 µg/L 75% of the EPA limit 60 µg/L Main supplier: DIANA SUD · 7,320 people · 2019 | 2/2 | SYR4 |
| Chloroform | 33.1 µg/L No EPA limit set Main supplier: DIANA SUD · 7,320 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 30.17 µg/L No EPA limit set Main supplier: DIANA SUD · 7,320 people · 2019 | 2/2 | SYR4 |
| Bromoform | 5.104 µg/L No EPA limit set Main supplier: DIANA SUD · 7,320 people · 2019
Highest in the ZIP: 28.675 µg/L — HARLETON WSC · 4,107 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 23 µg/L No EPA limit set Main supplier: DIANA SUD · 7,320 people · 2019
Highest in the ZIP: 25.58 µg/L — HARLETON WSC · 4,107 people · 2019 | 2/2 | SYR4 |
| Lithium | 18 µg/L No EPA limit set Main supplier: DIANA SUD · 7,320 people · 2025 | 2/2 | UCMR-5 |
| Trichloroacetic Acid | 13.275 µg/L No EPA limit set Main supplier: DIANA SUD · 7,320 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 2.47 µg/L No EPA limit set Main supplier: DIANA SUD · 7,320 people · 2019
Highest in the ZIP: 9.7 µg/L — HARLETON WSC · 4,107 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 4.68 µg/L No EPA limit set Main supplier: DIANA SUD · 7,320 people · 2019
Highest in the ZIP: 7.22 µg/L — HARLETON WSC · 4,107 people · 2019 | 2/2 | SYR4 |
| Gross Beta Particle Activity | 5.38 pCi/L No EPA limit set Main supplier: DIANA SUD · 7,320 people · 2018 | 1/2 | SYR4 |
| Lead | 1.868 µg/L 12% of the EPA limit 15 µg/L Main supplier: DIANA SUD · 7,320 people · 2019
Highest in the ZIP: 3.85 µg/L — HARLETON WSC · 4,107 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 1 µg/L No EPA limit set Main supplier: DIANA SUD · 7,320 people · 2019
Highest in the ZIP: 3.85 µg/L — HARLETON WSC · 4,107 people · 2019 | 2/2 | SYR4 |
| Chromium | 3.5005 µg/L 3.5% of the EPA limit 100 µg/L Main supplier: DIANA SUD · 7,320 people · 2019 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.3 pCi/L 22% of the EPA limit 15 pCi/L Main supplier: DIANA SUD · 7,320 people · 2018 | 1/2 | SYR4 |
| Selenium | 3.12 µg/L 6.2% of the EPA limit 50 µg/L Main supplier: DIANA SUD · 7,320 people · 2019 | 2/2 | SYR4 |
| Combined Radium (-226 And -228) | 2.76 pCi/L 55% of the EPA limit 5 pCi/L Main supplier: DIANA SUD · 7,320 people · 2018 | 1/2 | SYR4 |
| Xylenes, Total | 1.3232 µg/L 0% of the EPA limit 10000 µg/L Highest in the ZIP: HARLETON WSC · 4,107 people · 2019 | 1/2 | SYR4 |
| Arsenic | 1.14 µg/L 11% of the EPA limit 10 µg/L Main supplier: DIANA SUD · 7,320 people · 2019 | 1/2 | SYR4 |
| Thallium, Total | 0.7700 µg/L 39% of the EPA limit 2 µg/L Main supplier: DIANA SUD · 7,320 people · 2019 | 1/2 | SYR4 |
| Pfpea | 0.1640 µg/L No EPA limit set Highest in the ZIP: HARLETON WSC · 4,107 people · 2023 | 1/2 | UCMR-5 |
| Pfba | 0.0054 µg/L No EPA limit set Main supplier: DIANA SUD · 7,320 people · 2025
Highest in the ZIP: 0.0100 µg/L — HARLETON WSC · 4,107 people · 2023 | 2/2 | UCMR-5 |
| Pfhxa | 0.0065 µg/L No EPA limit set Highest in the ZIP: HARLETON WSC · 4,107 people · 2023 | 1/2 | UCMR-5 |
| 6:2 Fts | 0.0063 µg/L No EPA limit set Highest in the ZIP: HARLETON WSC · 4,107 people · 2023 | 1/2 | UCMR-5 |
| PFBS | 0.0048 µg/L No EPA limit set Highest in the ZIP: HARLETON WSC · 4,107 people · 2023 | 1/2 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: DIANA SUD · 7,320 people · 2025 | 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.
Water suppliers serving ZIP 75640
| Supplier | State | Population served |
|---|---|---|
| DIANA SUD | TX | 7,320 |
| HARLETON WSC | TX | 4,107 |
Frequently asked questions about ZIP 75640 tap water
Is the tap water in ZIP 75640 safe to drink?
EPA testing detected 34 contaminants across the water suppliers serving ZIP 75640. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 75640?
2 public water suppliers report EPA drinking-water monitoring for ZIP 75640. Each is listed above with its population served.
What contaminants are in ZIP 75640's water?
EPA monitoring detected Copper, Fluoride, Nitrate-Nitrite, Nitrate, Nitrite, and others across this ZIP's suppliers. The full list with levels and sources is above.