What was found in ZIP 77388
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 |
|---|---|---|---|
| Nitrate | 2562.5 µg/L 26% of the EPA limit 10000 µg/L Main supplier: MANVILLE WSC · 39,648 people · 2019 | 7/8 | SYR4 |
| Nitrate-Nitrite | 2287 µg/L 23% of the EPA limit 10000 µg/L Main supplier: MANVILLE WSC · 39,648 people · 2015 | 7/8 | SYR4 |
| Fluoride | 1625 µg/L 41% of the EPA limit 4000 µg/L Main supplier: MANVILLE WSC · 39,648 people · 2019 | 7/8 | SYR4 |
| Nitrite | 185 µg/L 19% of the EPA limit 1000 µg/L Main supplier: MANVILLE WSC · 39,648 people · 2015
Highest in the ZIP: 395 µg/L — BRIDGESTONE MUD · 24,528 people · 2015 | 6/8 | SYR4 |
| Copper | 290 µg/L 22% of the EPA limit 1300 µg/L Main supplier: MANVILLE WSC · 39,648 people · 2019
Highest in the ZIP: 306.45 µg/L — HARRIS COUNTY MUD 104 · 4,854 people · 2019 | 8/8 | SYR4 |
| Barium | 142 µg/L 7.1% of the EPA limit 2000 µg/L Main supplier: MANVILLE WSC · 39,648 people · 2019
Highest in the ZIP: 277.25 µg/L — BRIDGESTONE MUD · 24,528 people · 2019 | 7/8 | SYR4 |
| Cyanide | 117.1 µg/L 59% of the EPA limit 200 µg/L Main supplier: MANVILLE WSC · 39,648 people · 2019
Highest in the ZIP: 170 µg/L — KLEIN PUD · 3,504 people · 2017 | 6/8 | SYR4 |
| Xylenes, Total | 142.25 µg/L 1.4% of the EPA limit 10000 µg/L Main supplier: MANVILLE WSC · 39,648 people · 2019 | 3/8 | SYR4 |
| Lithium | 83.8 µg/L No EPA limit set Main supplier: MANVILLE WSC · 39,648 people · 2023 | 6/8 | UCMR-5 |
| TTHM | 64.85 µg/L 81% of the EPA limit 80 µg/L Main supplier: MANVILLE WSC · 39,648 people · 2019 | 8/8 | SYR4 |
| Total Haloacetic Acids (HAA5) | 21.58 µg/L 36% of the EPA limit 60 µg/L Main supplier: MANVILLE WSC · 39,648 people · 2019
Highest in the ZIP: 33.195 µg/L — BRIDGESTONE MUD · 24,528 people · 2019 | 8/8 | SYR4 |
| Ethylbenzene | 28.25 µg/L 4% of the EPA limit 700 µg/L Main supplier: MANVILLE WSC · 39,648 people · 2019 | 1/8 | SYR4 |
| Dichloroacetic Acid | 11.6 µg/L No EPA limit set Main supplier: MANVILLE WSC · 39,648 people · 2019
Highest in the ZIP: 28 µg/L — BRIDGESTONE MUD · 24,528 people · 2019 | 8/8 | SYR4 |
| Bromodichloromethane | 24.02 µg/L No EPA limit set Main supplier: MANVILLE WSC · 39,648 people · 2019 | 8/8 | SYR4 |
| Dibromochloromethane | 22.16 µg/L No EPA limit set Main supplier: MANVILLE WSC · 39,648 people · 2019 | 7/8 | SYR4 |
| Chloroform | 18.9 µg/L No EPA limit set Main supplier: MANVILLE WSC · 39,648 people · 2019
Highest in the ZIP: 21.5 µg/L — BRIDGESTONE MUD · 24,528 people · 2019 | 8/8 | SYR4 |
| Lead | 4.875 µg/L 33% of the EPA limit 15 µg/L Main supplier: MANVILLE WSC · 39,648 people · 2019
Highest in the ZIP: 20.83 µg/L — HARRIS COUNTY MUD 104 · 4,854 people · 2019 | 8/8 | SYR4 |
| Bromoform | 9.495 µg/L No EPA limit set Main supplier: MANVILLE WSC · 39,648 people · 2019
Highest in the ZIP: 13.15 µg/L — CYPRESSWOOD UTILITY DISTRICT · 4,305 people · 2019 | 7/8 | SYR4 |
| Monochloroacetic Acid | 3.735 µg/L No EPA limit set Main supplier: MANVILLE WSC · 39,648 people · 2019
Highest in the ZIP: 11.8 µg/L — HARRIS COUNTY WCID 132 · 3,501 people · 2019 | 8/8 | SYR4 |
| Arsenic | 2.665 µg/L 27% of the EPA limit 10 µg/L Main supplier: MANVILLE WSC · 39,648 people · 2019
Highest in the ZIP: 8.8 µg/L — CYPRESSWOOD UTILITY DISTRICT · 4,305 people · 2019 | 5/8 | SYR4 |
| Trichloroacetic Acid | 8.645 µg/L No EPA limit set Main supplier: MANVILLE WSC · 39,648 people · 2019 | 8/8 | SYR4 |
| Selenium | 6.525 µg/L 13% of the EPA limit 50 µg/L Main supplier: MANVILLE WSC · 39,648 people · 2019
Highest in the ZIP: 8.145 µg/L — SPRING WEST MUD · 2,639 people · 2018 | 2/8 | SYR4 |
| Dibromoacetic Acid | 6.59 µg/L No EPA limit set Main supplier: MANVILLE WSC · 39,648 people · 2019 | 7/8 | SYR4 |
| Gross Alpha, Excl. Radon And U | 6.36 pCi/L 42% of the EPA limit 15 pCi/L Main supplier: MANVILLE WSC · 39,648 people · 2019 | 3/8 | SYR4 |
| Gross Beta Particle Activity | 4.4 pCi/L No EPA limit set Main supplier: MANVILLE WSC · 39,648 people · 2019
Highest in the ZIP: 5.245 pCi/L — HARRIS COUNTY WCID 132 · 3,501 people · 2019 | 5/8 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 4.4 µg/L 73% of the EPA limit 6 µg/L Highest in the ZIP: SPRING WEST MUD · 2,639 people · 2019 | 2/8 | SYR4 |
| Combined Radium (-226 And -228) | 2.108 pCi/L 42% of the EPA limit 5 pCi/L Main supplier: MANVILLE WSC · 39,648 people · 2017
Highest in the ZIP: 4.195 pCi/L — BRIDGESTONE MUD · 24,528 people · 2019 | 5/8 | SYR4 |
| Chromium | 4.0695 µg/L 4.1% of the EPA limit 100 µg/L Main supplier: MANVILLE WSC · 39,648 people · 2019 | 1/8 | SYR4 |
| Atrazine | 0.6525 µg/L 22% of the EPA limit 3 µg/L Main supplier: MANVILLE WSC · 39,648 people · 2019
Highest in the ZIP: 2.3445 µg/L — CYPRESSWOOD UTILITY DISTRICT · 4,305 people · 2019 | 5/8 | SYR4 |
| Combined Uranium | 2.3 µg/L 7.7% of the EPA limit 30 µg/L Main supplier: MANVILLE WSC · 39,648 people · 2019 | 3/8 | SYR4 |
| Monobromoacetic Acid | 1.94 µg/L No EPA limit set Main supplier: MANVILLE WSC · 39,648 people · 2019 | 1/8 | SYR4 |
| 2,4-D | 0.2000 µg/L 0.3% of the EPA limit 70 µg/L Highest in the ZIP: SPRING WEST MUD · 2,639 people · 2019 | 1/8 | SYR4 |
| Simazine | 0.1480 µg/L 3.7% of the EPA limit 4 µg/L Main supplier: MANVILLE WSC · 39,648 people · 2019
Highest in the ZIP: 0.1900 µg/L — BRIDGESTONE MUD · 24,528 people · 2019 | 5/8 | SYR4 |
| PFNA | 0.0243 µg/L No EPA limit set Main supplier: MANVILLE WSC · 39,648 people · 2023 | 1/8 | UCMR-5 |
| PFOS | 0.0124 µg/L No EPA limit set Main supplier: MANVILLE WSC · 39,648 people · 2023 | 1/8 | UCMR-5 |
| Lead | 0.0014 mg/L 9.4% of the EPA limit 0.0150 mg/L Main supplier: MANVILLE WSC · 39,648 people · 2025
Highest in the ZIP: 0.0109 mg/L — HARRIS COUNTY MUD 104 · 4,854 people · 2025 | 8/8 | LCR |
| PFBS | 0.0100 µg/L No EPA limit set Main supplier: MANVILLE WSC · 39,648 people · 2023 | 1/8 | UCMR-5 |
| Pfba | 0.0074 µg/L No EPA limit set Main supplier: MANVILLE WSC · 39,648 people · 2023
Highest in the ZIP: 0.0092 µg/L — HARRIS COUNTY WCID 132 · 3,501 people · 2025 | 5/8 | UCMR-5 |
| Pfpea | 0.0091 µg/L No EPA limit set Main supplier: MANVILLE WSC · 39,648 people · 2023 | 5/8 | UCMR-5 |
| Pfhxa | 0.0087 µg/L No EPA limit set Main supplier: MANVILLE WSC · 39,648 people · 2023 | 3/8 | UCMR-5 |
| PFHXS | 0.0070 µg/L No EPA limit set Main supplier: MANVILLE WSC · 39,648 people · 2023 | 1/8 | UCMR-5 |
| PFOA | 0.0059 µg/L No EPA limit set Main supplier: MANVILLE WSC · 39,648 people · 2023 | 1/8 | UCMR-5 |
| Pfhpa | 0.0043 µg/L No EPA limit set Main supplier: MANVILLE WSC · 39,648 people · 2023 | 1/8 | UCMR-5 |
| Pfuna | 0.0027 µg/L No EPA limit set Main supplier: MANVILLE WSC · 39,648 people · 2023 | 1/8 | 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.
Water suppliers serving ZIP 77388
| Supplier | State | Population served |
|---|---|---|
| MANVILLE WSC | TX | 39,648 |
| BRIDGESTONE MUD | TX | 24,528 |
| HARRIS COUNTY WCID 110 | TX | 9,807 |
| HARRIS COUNTY MUD 104 | TX | 4,854 |
| CYPRESSWOOD UTILITY DISTRICT | TX | 4,305 |
| KLEIN PUD | TX | 3,504 |
| HARRIS COUNTY WCID 132 | TX | 3,501 |
| SPRING WEST MUD | TX | 2,639 |
Frequently asked questions about ZIP 77388 tap water
Is the tap water in ZIP 77388 safe to drink?
EPA testing detected 44 contaminants across the water suppliers serving ZIP 77388. 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 77388?
8 public water suppliers report EPA drinking-water monitoring for ZIP 77388. Each is listed above with its population served.
What contaminants are in ZIP 77388's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Nitrite, Copper, and others across this ZIP's suppliers. The full list with levels and sources is above.