What was found in ZIP 77316
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 | 288 µg/L 7.2% of the EPA limit 4000 µg/L Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2018
Highest in the ZIP: 1046 µg/L — MONTGOMERY COUNTY MUD 18 · 7,608 people · 2018 | 3/3 | SYR4 |
| Copper | 825.2 µg/L 63% of the EPA limit 1300 µg/L Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2019 | 3/3 | SYR4 |
| Nitrate | 247.5 µg/L 2.5% of the EPA limit 10000 µg/L Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2019
Highest in the ZIP: 530 µg/L — DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 29.5 µg/L 0.3% of the EPA limit 10000 µg/L Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2014
Highest in the ZIP: 516.5 µg/L — DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2019 | 3/3 | SYR4 |
| Barium | 226.8 µg/L 11% of the EPA limit 2000 µg/L Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2019
Highest in the ZIP: 234.8 µg/L — DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2018 | 3/3 | SYR4 |
| TTHM | 73.82 µg/L 92% of the EPA limit 80 µg/L Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2019
Highest in the ZIP: 135 µg/L — DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2019 | 3/3 | SYR4 |
| Bromoform | 6.94 µg/L No EPA limit set Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2019
Highest in the ZIP: 100.36 µg/L — DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2019 | 3/3 | SYR4 |
| Chloroform | 56.945 µg/L No EPA limit set Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2019 | 3/3 | SYR4 |
| Lithium | 46.8 µg/L No EPA limit set Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2025
Highest in the ZIP: 52.3 µg/L — MONTGOMERY COUNTY MUD 18 · 7,608 people · 2023 | 3/3 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 51.62 µg/L 86% of the EPA limit 60 µg/L Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 27.3 µg/L No EPA limit set Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 11.255 µg/L No EPA limit set Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2019
Highest in the ZIP: 24.3 µg/L — DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 20.49 µg/L No EPA limit set Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 2.98 µg/L No EPA limit set Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2019
Highest in the ZIP: 17.3 µg/L — DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 17.04 µg/L No EPA limit set Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2019 | 3/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 6.65 pCi/L 44% of the EPA limit 15 pCi/L Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2018
Highest in the ZIP: 13.275 pCi/L — DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2018 | 3/3 | SYR4 |
| Lead | 9.8 µg/L 65% of the EPA limit 15 µg/L Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2019
Highest in the ZIP: 13.13 µg/L — MONTGOMERY COUNTY MUD 18 · 7,608 people · 2018 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 9.985 pCi/L No EPA limit set Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2018
Highest in the ZIP: 11.58 pCi/L — DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2018 | 3/3 | SYR4 |
| Monochloroacetic Acid | 5.15 µg/L No EPA limit set Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2019
Highest in the ZIP: 7.9 µg/L — MONTGOMERY COUNTY MUD 18 · 7,608 people · 2019 | 2/3 | SYR4 |
| Arsenic | 7.77 µg/L 78% of the EPA limit 10 µg/L Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2019 | 2/3 | SYR4 |
| Selenium | 5.85 µg/L 12% of the EPA limit 50 µg/L Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2019 | 2/3 | SYR4 |
| Xylenes, Total | 4.975 µg/L 0% of the EPA limit 10000 µg/L Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2019 | 3/3 | SYR4 |
| Combined Radium (-226 And -228) | 2.91 pCi/L 58% of the EPA limit 5 pCi/L Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2018
Highest in the ZIP: 4.7 pCi/L — DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2018 | 3/3 | SYR4 |
| Combined Uranium | 2.48 µg/L 8.3% of the EPA limit 30 µg/L Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2018 | 1/3 | SYR4 |
| Dalapon | 2.225 µg/L 1.1% of the EPA limit 200 µg/L Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2019 | 1/3 | SYR4 |
| Monobromoacetic Acid | 1.575 µg/L No EPA limit set Highest in the ZIP: DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2019 | 1/3 | SYR4 |
| Ethylbenzene | 0.6900 µg/L 0.1% of the EPA limit 700 µg/L Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2019
Highest in the ZIP: 0.8000 µg/L — DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2019 | 2/3 | SYR4 |
| Pfba | 0.0116 µg/L No EPA limit set Highest in the ZIP: MONTGOMERY COUNTY MUD 18 · 7,608 people · 2023 | 1/3 | UCMR-5 |
| 6:2 Fts | 0.0056 µg/L No EPA limit set Highest in the ZIP: MONTGOMERY COUNTY MUD 18 · 7,608 people · 2023 | 1/3 | UCMR-5 |
| PFOA | 0.0048 µg/L No EPA limit set Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2025 | 1/3 | UCMR-5 |
| Lead | 0.00041 mg/L 2.7% of the EPA limit 0.0150 mg/L Main supplier: MONTGOMERY TRACE WATER SYSTEM · 25,917 people · 2026 | 3/3 | 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 77316
| Supplier | State | Population served |
|---|---|---|
| MONTGOMERY TRACE WATER SYSTEM | TX | 25,917 |
| MONTGOMERY COUNTY MUD 18 | TX | 7,608 |
| DOBBIN PLANTERSVILLE WSC 1 | TX | 4,767 |
Frequently asked questions about ZIP 77316 tap water
Is the tap water in ZIP 77316 safe to drink?
EPA testing detected 31 contaminants across the water suppliers serving ZIP 77316. 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 77316?
3 public water suppliers report EPA drinking-water monitoring for ZIP 77316. Each is listed above with its population served.
What contaminants are in ZIP 77316's water?
EPA monitoring detected Fluoride, Copper, Nitrate, Nitrate-Nitrite, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.