What was found in ZIP 78656
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 |
|---|---|---|---|
| Fluoride | 3115 µg/L 78% of the EPA limit 4000 µg/L Main supplier: COUNTY LINE SUD · 19,609 people · 2017 | 1/2 | SYR4 |
| Copper | 1400 µg/L 108% of the EPA limit, at the 95th percentile of samples — 1300 µg/L Main supplier: COUNTY LINE SUD · 19,609 people · 2019 | 2/2 | SYR4 |
| TTHM | 53.69999999999996 µg/L 67% of the EPA limit 80 µg/L Main supplier: COUNTY LINE SUD · 19,609 people · 2019
Highest in the ZIP: 113.17999999999994 µg/L — MAXWELL SUD · 16,104 people · 2019 | 2/2 | SYR4 |
| Barium | 67.125 µg/L 3.4% of the EPA limit 2000 µg/L Main supplier: COUNTY LINE SUD · 19,609 people · 2019 | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 30.834999999999987 µg/L 51% of the EPA limit 60 µg/L Main supplier: COUNTY LINE SUD · 19,609 people · 2019
Highest in the ZIP: 44.255 µg/L — MAXWELL SUD · 16,104 people · 2019 | 2/2 | SYR4 |
| Chloroform | 21.05 µg/L No EPA limit set Main supplier: COUNTY LINE SUD · 19,609 people · 2019
Highest in the ZIP: 43.71999999999993 µg/L — MAXWELL SUD · 16,104 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 18.494999999999955 µg/L No EPA limit set Main supplier: COUNTY LINE SUD · 19,609 people · 2019
Highest in the ZIP: 36.09499999999999 µg/L — MAXWELL SUD · 16,104 people · 2019 | 2/2 | SYR4 |
| Nitrate | 30 µg/L 0.3% of the EPA limit 10000 µg/L Main supplier: COUNTY LINE SUD · 19,609 people · 2019 | 1/2 | SYR4 |
| Dibromochloromethane | 16.02499999999997 µg/L No EPA limit set Main supplier: COUNTY LINE SUD · 19,609 people · 2019
Highest in the ZIP: 25.894999999999992 µg/L — MAXWELL SUD · 16,104 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 12.624999999999993 µg/L No EPA limit set Main supplier: COUNTY LINE SUD · 19,609 people · 2019
Highest in the ZIP: 25.209999999999997 µg/L — MAXWELL SUD · 16,104 people · 2019 | 2/2 | SYR4 |
| Cyanide | 20 µg/L 10% of the EPA limit 200 µg/L Main supplier: COUNTY LINE SUD · 19,609 people · 2017 | 1/2 | SYR4 |
| Lithium | 11.9 µg/L No EPA limit set Main supplier: COUNTY LINE SUD · 19,609 people · 2025 | 2/2 | UCMR-5 |
| Monochloroacetic Acid | 10.379999999999999 µg/L No EPA limit set Main supplier: COUNTY LINE SUD · 19,609 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 7.599999999999998 µg/L No EPA limit set Main supplier: COUNTY LINE SUD · 19,609 people · 2019
Highest in the ZIP: 9.04 µg/L — MAXWELL SUD · 16,104 people · 2019 | 2/2 | SYR4 |
| Bromoform | 5.849999999999998 µg/L No EPA limit set Main supplier: COUNTY LINE SUD · 19,609 people · 2019
Highest in the ZIP: 7.594999999999999 µg/L — MAXWELL SUD · 16,104 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 7.229999999999999 µg/L No EPA limit set Main supplier: COUNTY LINE SUD · 19,609 people · 2019 | 2/2 | SYR4 |
| Lead | 6.049999999999995 µg/L 40% of the EPA limit 15 µg/L Main supplier: COUNTY LINE SUD · 19,609 people · 2019 | 2/2 | SYR4 |
| Gross Beta Particle Activity | 5.6 pCi/L No EPA limit set Main supplier: COUNTY LINE SUD · 19,609 people · 2018 | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 5.5 pCi/L 37% of the EPA limit 15 pCi/L Main supplier: COUNTY LINE SUD · 19,609 people · 2018 | 1/2 | SYR4 |
| Monobromoacetic Acid | 1.58 µg/L No EPA limit set Main supplier: COUNTY LINE SUD · 19,609 people · 2019
Highest in the ZIP: 2.175 µg/L — MAXWELL SUD · 16,104 people · 2019 | 2/2 | SYR4 |
| Combined Radium (-226 And -228) | 1.1 pCi/L 22% of the EPA limit 5 pCi/L Main supplier: COUNTY LINE SUD · 19,609 people · 2018 | 1/2 | SYR4 |
| Pfpea | 0.0045 µg/L No EPA limit set Main supplier: COUNTY LINE SUD · 19,609 people · 2025 | 2/2 | UCMR-5 |
| Pfhxa | 0.0037 µg/L No EPA limit set Highest in the ZIP: MAXWELL SUD · 16,104 people · 2025 | 1/2 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: COUNTY LINE SUD · 19,609 people · 2025
Highest in the ZIP: 0.0011 mg/L — MAXWELL SUD · 16,104 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 78656
| Supplier | State | Population served |
|---|---|---|
| COUNTY LINE SUD | TX | 19,609 |
| MAXWELL SUD | TX | 16,104 |
Frequently asked questions about ZIP 78656 tap water
Is the tap water in ZIP 78656 safe to drink?
EPA testing detected 24 contaminants across the water suppliers serving ZIP 78656. 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 78656?
2 public water suppliers report EPA drinking-water monitoring for ZIP 78656. Each is listed above with its population served.
What contaminants are in ZIP 78656's water?
EPA monitoring detected Fluoride, Copper, TTHM, Barium, Total Haloacetic Acids (HAA5), and others across this ZIP's suppliers. The full list with levels and sources is above.