What was found in ZIP 77356
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 | 828 µg/L 21% of the EPA limit 4000 µg/L Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2017
Highest in the ZIP: 2122 µg/L — STANLEY LAKE MUD · 3,783 people · 2017 | 3/3 | SYR4 |
| Nitrate | 40 µg/L 0.4% of the EPA limit 10000 µg/L Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2019
Highest in the ZIP: 530 µg/L — DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 36 µg/L 0.4% of the EPA limit 10000 µg/L Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2019
Highest in the ZIP: 516.5 µg/L — DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2019 | 3/3 | SYR4 |
| Copper | 334 µg/L 26% of the EPA limit 1300 µg/L Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2017 | 3/3 | SYR4 |
| Barium | 128.95 µg/L 6.4% of the EPA limit 2000 µg/L Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2017
Highest in the ZIP: 234.8 µg/L — DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2018 | 3/3 | SYR4 |
| Lithium | 98 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2023
Highest in the ZIP: 150 µg/L — STANLEY LAKE MUD · 3,783 people · 2024 | 3/3 | UCMR-5 |
| TTHM | 35.8 µg/L 45% of the EPA limit 80 µg/L Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2019
Highest in the ZIP: 135 µg/L — DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2019 | 3/3 | SYR4 |
| Bromoform | 25.9 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2019
Highest in the ZIP: 100.36 µg/L — DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 26.25 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2019 | 3/3 | SYR4 |
| Chloroform | 17.625 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2019
Highest in the ZIP: 23.6 µg/L — STANLEY LAKE MUD · 3,783 people · 2019 | 3/3 | SYR4 |
| Combined Uranium | 20 µg/L 67% of the EPA limit 30 µg/L Highest in the ZIP: STANLEY LAKE MUD · 3,783 people · 2018 | 1/3 | SYR4 |
| Dibromoacetic Acid | 5.18 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2019
Highest in the ZIP: 17.3 µg/L — DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 5.4 µg/L 9% of the EPA limit 60 µg/L Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2019
Highest in the ZIP: 17.26 µg/L — DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 16.25 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2019 | 3/3 | SYR4 |
| Lead | 6.14 µg/L 41% of the EPA limit 15 µg/L Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2017
Highest in the ZIP: 14.18 µg/L — STANLEY LAKE MUD · 3,783 people · 2019 | 3/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 9.045 pCi/L 60% of the EPA limit 15 pCi/L Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2017
Highest in the ZIP: 13.275 pCi/L — DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2018 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 10.46 pCi/L No EPA limit set Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2017
Highest in the ZIP: 11.58 pCi/L — DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2018 | 3/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 6.985 µg/L 116% of the EPA limit, at the 95th percentile of samples — 6 µg/L Highest in the ZIP: STANLEY LAKE MUD · 3,783 people · 2019 | 1/3 | SYR4 |
| Xylenes, Total | 5.3 µg/L 0.1% of the EPA limit 10000 µg/L Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2019 | 2/3 | SYR4 |
| Selenium | 5 µg/L 10% of the EPA limit 50 µg/L Highest in the ZIP: STANLEY LAKE MUD · 3,783 people · 2017 | 1/3 | SYR4 |
| Arsenic | 4.765 µg/L 48% of the EPA limit 10 µg/L Highest in the ZIP: DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2018 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 2.955 pCi/L 59% of the EPA limit 5 pCi/L Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2017
Highest in the ZIP: 4.7 pCi/L — DOBBIN PLANTERSVILLE WSC 1 · 4,767 people · 2018 | 3/3 | SYR4 |
| Dichloroacetic Acid | 1.1 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2019
Highest in the ZIP: 2.2 µg/L — STANLEY LAKE MUD · 3,783 people · 2019 | 3/3 | SYR4 |
| Ethylbenzene | 1.6 µg/L 0.2% of the EPA limit 700 µg/L Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2019 | 2/3 | 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 |
| Toluene | 1.5 µg/L 0.2% of the EPA limit 1000 µg/L Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2019 | 1/3 | SYR4 |
| Dalapon | 1.3 µg/L 0.7% of the EPA limit 200 µg/L Highest in the ZIP: STANLEY LAKE MUD · 3,783 people · 2019 | 1/3 | SYR4 |
| 2,4-D | 0.2950 µg/L 0.4% of the EPA limit 70 µg/L Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2017 | 1/3 | SYR4 |
| Lead | 0.00096 mg/L 6.4% of the EPA limit 0.0150 mg/L Main supplier: MONTGOMERY COUNTY MUD 9 · 5,949 people · 2024 | 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 77356
| Supplier | State | Population served |
|---|---|---|
| MONTGOMERY COUNTY MUD 9 | TX | 5,949 |
| DOBBIN PLANTERSVILLE WSC 1 | TX | 4,767 |
| STANLEY LAKE MUD | TX | 3,783 |
Frequently asked questions about ZIP 77356 tap water
Is the tap water in ZIP 77356 safe to drink?
EPA testing detected 29 contaminants across the water suppliers serving ZIP 77356. 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 77356?
3 public water suppliers report EPA drinking-water monitoring for ZIP 77356. Each is listed above with its population served.
What contaminants are in ZIP 77356's water?
EPA monitoring detected Fluoride, Nitrate, Nitrate-Nitrite, Copper, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.