What was found in ZIP 77065
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 | 729 µg/L 18% of the EPA limit 4000 µg/L Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2017 | 4/4 | SYR4 |
| Copper | 397.85 µg/L 31% of the EPA limit 1300 µg/L Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2019
Highest in the ZIP: 623 µg/L — HARRIS COUNTY MUD 168 · 13,029 people · 2019 | 4/4 | SYR4 |
| Barium | 294.5 µg/L 15% of the EPA limit 2000 µg/L Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2019
Highest in the ZIP: 308.8 µg/L — HARRIS COUNTY MUD 168 · 13,029 people · 2019 | 4/4 | SYR4 |
| Nitrate | 190 µg/L 1.9% of the EPA limit 10000 µg/L Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2019
Highest in the ZIP: 200 µg/L — HARRIS COUNTY MUD 222 · 6,129 people · 2019 | 4/4 | SYR4 |
| Nitrate-Nitrite | 180 µg/L 1.8% of the EPA limit 10000 µg/L Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2015
Highest in the ZIP: 190 µg/L — HARRIS COUNTY MUD 222 · 6,129 people · 2015 | 4/4 | SYR4 |
| Lithium | 25.9 µg/L No EPA limit set Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2024
Highest in the ZIP: 39.8 µg/L — HARRIS COUNTY MUD 168 · 13,029 people · 2024 | 4/4 | UCMR-5 |
| Lead | 5.692 µg/L 38% of the EPA limit 15 µg/L Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2019
Highest in the ZIP: 20.825 µg/L — HARRIS COUNTY MUD 168 · 13,029 people · 2019 | 4/4 | SYR4 |
| TTHM | 5.335 µg/L 6.7% of the EPA limit 80 µg/L Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2019
Highest in the ZIP: 15.22 µg/L — HARRIS COUNTY MUD 168 · 13,029 people · 2019 | 3/4 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 14.37 µg/L 240% of the EPA limit, at the 95th percentile of samples — 6 µg/L Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2019 | 1/4 | SYR4 |
| Chromium | 11.1 µg/L 11% of the EPA limit 100 µg/L Highest in the ZIP: HARRIS COUNTY MUD 168 · 13,029 people · 2019 | 1/4 | SYR4 |
| Selenium | 9.45 µg/L 19% of the EPA limit 50 µg/L Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2019
Highest in the ZIP: 10.7 µg/L — HARRIS COUNTY MUD 222 · 6,129 people · 2019 | 3/4 | SYR4 |
| Bromoform | 2.15 µg/L No EPA limit set Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2019
Highest in the ZIP: 9.05 µg/L — HARRIS COUNTY MUD 168 · 13,029 people · 2019 | 3/4 | SYR4 |
| Dibromochloromethane | 2.2 µg/L No EPA limit set Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2019
Highest in the ZIP: 8.66 µg/L — HARRIS COUNTY MUD 168 · 13,029 people · 2019 | 3/4 | SYR4 |
| Arsenic | 7.75 µg/L 78% of the EPA limit 10 µg/L Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2019 | 4/4 | SYR4 |
| Bromodichloromethane | 1.5 µg/L No EPA limit set Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2019
Highest in the ZIP: 5.13 µg/L — HARRIS COUNTY MUD 168 · 13,029 people · 2019 | 3/4 | SYR4 |
| Gross Alpha, Excl. Radon And U | 5 pCi/L 33% of the EPA limit 15 pCi/L Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2019 | 3/4 | SYR4 |
| Gross Beta Particle Activity | 4.2 pCi/L No EPA limit set Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2019
Highest in the ZIP: 4.3 pCi/L — HARRIS COUNTY MUD 168 · 13,029 people · 2019 | 2/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 1.23 µg/L 2.1% of the EPA limit 60 µg/L Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2019
Highest in the ZIP: 4.1 µg/L — HARRIS COUNTY MUD 168 · 13,029 people · 2019 | 2/4 | SYR4 |
| Combined Uranium | 3.88 µg/L 13% of the EPA limit 30 µg/L Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2019 | 3/4 | SYR4 |
| Chloroform | 2.5 µg/L No EPA limit set Highest in the ZIP: HARRIS COUNTY MUD 168 · 13,029 people · 2019 | 1/4 | SYR4 |
| Combined Radium (-226 And -228) | 2.0305 pCi/L 41% of the EPA limit 5 pCi/L Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2017 | 2/4 | SYR4 |
| Dibromoacetic Acid | 1.23 µg/L No EPA limit set Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2019
Highest in the ZIP: 1.825 µg/L — HARRIS COUNTY MUD 168 · 13,029 people · 2019 | 2/4 | SYR4 |
| Xylenes, Total | 1.8 µg/L 0% of the EPA limit 10000 µg/L Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2019 | 2/4 | SYR4 |
| Trichloroacetic Acid | 1.37 µg/L No EPA limit set Highest in the ZIP: HARRIS COUNTY MUD 168 · 13,029 people · 2019 | 1/4 | SYR4 |
| Dichloroacetic Acid | 1.29 µg/L No EPA limit set Highest in the ZIP: HARRIS COUNTY MUD 168 · 13,029 people · 2019 | 1/4 | SYR4 |
| Toluene | 0.8000 µg/L 0.1% of the EPA limit 1000 µg/L Highest in the ZIP: HARRIS COUNTY MUD 168 · 13,029 people · 2019 | 1/4 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: HARRIS COUNTY FWSD 61 · 15,400 people · 2025
Highest in the ZIP: 0.0038 mg/L — HARRIS COUNTY MUD 69 · 4,422 people · 2025 | 4/4 | 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 77065
| Supplier | State | Population served |
|---|---|---|
| HARRIS COUNTY FWSD 61 | TX | 15,400 |
| HARRIS COUNTY MUD 168 | TX | 13,029 |
| HARRIS COUNTY MUD 222 | TX | 6,129 |
| HARRIS COUNTY MUD 69 | TX | 4,422 |
Frequently asked questions about ZIP 77065 tap water
Is the tap water in ZIP 77065 safe to drink?
EPA testing detected 27 contaminants across the water suppliers serving ZIP 77065. 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 77065?
4 public water suppliers report EPA drinking-water monitoring for ZIP 77065. Each is listed above with its population served.
What contaminants are in ZIP 77065's water?
EPA monitoring detected Fluoride, Copper, Barium, Nitrate, Nitrate-Nitrite, and others across this ZIP's suppliers. The full list with levels and sources is above.