What was found in ZIP 77429
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 | 1419.4999999999995 µg/L 35% of the EPA limit 4000 µg/L Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2019
Highest in the ZIP: 2248 µg/L — CYPRESS HILL MUD 1 · 11,052 people · 2017 | 13/14 | SYR4 |
| Nitrate | 840 µg/L 8.4% of the EPA limit 10000 µg/L Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2019
Highest in the ZIP: 1300 µg/L — HARRIS COUNTY MUD 18 HEATHERWOOD HUNTERS · 4,083 people · 2019 | 13/14 | SYR4 |
| Nitrate-Nitrite | 796 µg/L 8% of the EPA limit 10000 µg/L Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2015 | 13/14 | SYR4 |
| Copper | 158.25 µg/L 12% of the EPA limit 1300 µg/L Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2018
Highest in the ZIP: 540 µg/L — HARRIS COUNTY MUD 360 · 4,707 people · 2019 | 14/14 | SYR4 |
| Barium | 309.6 µg/L 15% of the EPA limit 2000 µg/L Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2019
Highest in the ZIP: 403.2 µg/L — HARRIS COUNTY MUD 18 HEATHERWOOD HUNTERS · 4,083 people · 2019 | 13/14 | SYR4 |
| Cyanide | 112 µg/L 56% of the EPA limit 200 µg/L Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2019
Highest in the ZIP: 130 µg/L — FAULKEY GULLY MUD · 8,907 people · 2017 | 3/14 | SYR4 |
| TTHM | 103.06499999999997 µg/L 129% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2019 | 13/14 | SYR4 |
| Nitrite | 89.49999999999997 µg/L 8.9% of the EPA limit 1000 µg/L Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2017 | 4/14 | SYR4 |
| Lithium | 87.4 µg/L No EPA limit set Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2023 | 12/14 | UCMR-5 |
| Chloroform | 39.48499999999999 µg/L No EPA limit set Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2019
Highest in the ZIP: 44.099999999999994 µg/L — HARRIS COUNTY MUD 365 · 4,461 people · 2019 | 9/14 | SYR4 |
| Total Haloacetic Acids (HAA5) | 36.55999999999995 µg/L 61% of the EPA limit 60 µg/L Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2019 | 10/14 | SYR4 |
| Lead | 3.049999999999999 µg/L 20% of the EPA limit 15 µg/L Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2018
Highest in the ZIP: 35.25999999999997 µg/L — NORTHWEST HARRIS COUNTY MUD 10 · 7,671 people · 2017 | 14/14 | SYR4 |
| Bromodichloromethane | 25.5 µg/L No EPA limit set Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2019 | 13/14 | SYR4 |
| Dichloroacetic Acid | 19.8 µg/L No EPA limit set Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2019
Highest in the ZIP: 22.985 µg/L — FAULKEY GULLY MUD · 8,907 people · 2019 | 6/14 | SYR4 |
| Dibromochloromethane | 20.859999999999992 µg/L No EPA limit set Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2019 | 14/14 | SYR4 |
| Dibromoacetic Acid | 19.619999999999997 µg/L No EPA limit set Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2019 | 8/14 | SYR4 |
| Bromoform | 13.784999999999998 µg/L No EPA limit set Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2019
Highest in the ZIP: 15.25 µg/L — HARRIS COUNTY MUD 18 HEATHERWOOD HUNTERS · 4,083 people · 2019 | 12/14 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 14.37 µg/L 240% of the EPA limit, at the 95th percentile of samples — 6 µg/L Highest in the ZIP: HARRIS COUNTY FWSD 61 · 15,400 people · 2019 | 4/14 | SYR4 |
| Xylenes, Total | 14.054999999999998 µg/L 0.1% of the EPA limit 10000 µg/L Highest in the ZIP: CYPRESS HILL MUD 1 · 11,052 people · 2019 | 9/14 | SYR4 |
| Selenium | 3.1 µg/L 6.2% of the EPA limit 50 µg/L Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2019
Highest in the ZIP: 9.45 µg/L — HARRIS COUNTY FWSD 61 · 15,400 people · 2019 | 10/14 | SYR4 |
| Arsenic | 8.799999999999997 µg/L 88% of the EPA limit 10 µg/L Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2019 | 12/14 | SYR4 |
| Gross Alpha, Excl. Radon And U | 8.48 pCi/L 57% of the EPA limit 15 pCi/L Highest in the ZIP: NORTHWEST HARRIS COUNTY MUD 10 · 7,671 people · 2019 | 11/14 | SYR4 |
| Gross Beta Particle Activity | 6.095 pCi/L No EPA limit set Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2017
Highest in the ZIP: 7.695 pCi/L — HARRIS COUNTY MUD 365 · 4,461 people · 2019 | 7/14 | SYR4 |
| Monochloroacetic Acid | 7.4 µg/L No EPA limit set Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2019 | 3/14 | SYR4 |
| Trichloroacetic Acid | 6.919999999999996 µg/L No EPA limit set Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2019 | 4/14 | SYR4 |
| Combined Uranium | 5.6049999999999995 µg/L 19% of the EPA limit 30 µg/L Highest in the ZIP: NORTHWEST HARRIS COUNTY MUD 9 · 7,848 people · 2014 | 8/14 | SYR4 |
| Combined Radium (-226 And -228) | 2.9 pCi/L 58% of the EPA limit 5 pCi/L Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2014 | 10/14 | SYR4 |
| Monobromoacetic Acid | 2.19 µg/L No EPA limit set Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2019 | 1/14 | SYR4 |
| Atrazine | 0.3735 µg/L 12% of the EPA limit 3 µg/L Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2018
Highest in the ZIP: 2 µg/L — HARRIS COUNTY MUD 18 HEATHERWOOD HUNTERS · 4,083 people · 2019 | 3/14 | SYR4 |
| Toluene | 2 µg/L 0.2% of the EPA limit 1000 µg/L Highest in the ZIP: HARRIS COUNTY MUD 18 HEATHERWOOD HUNTERS · 4,083 people · 2019 | 1/14 | SYR4 |
| Ethylbenzene | 1.8649999999999998 µg/L 0.3% of the EPA limit 700 µg/L Highest in the ZIP: CYPRESS HILL MUD 1 · 11,052 people · 2019 | 4/14 | SYR4 |
| Carbon Tetrachloride | 0.6000 µg/L 12% of the EPA limit 5 µg/L Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2019 | 1/14 | SYR4 |
| Simazine | 0.2225 µg/L 5.6% of the EPA limit 4 µg/L Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2018 | 3/14 | SYR4 |
| 2,4-D | 0.1000 µg/L 0.1% of the EPA limit 70 µg/L Highest in the ZIP: FAULKEY GULLY MUD · 8,907 people · 2019 | 1/14 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2023
Highest in the ZIP: 0.0438 mg/L — NORTHWEST HARRIS COUNTY MUD 9 · 7,848 people · 2026 | 14/14 | LCR |
| Pfba | 0.0192 µg/L No EPA limit set Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2024 | 4/14 | UCMR-5 |
| Pfpea | 0.0119 µg/L No EPA limit set Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2024 | 4/14 | UCMR-5 |
| Pfhxa | 0.0060 µg/L No EPA limit set Main supplier: NORTHWEST HARRIS COUNTY MUD 5 · 25,425 people · 2024 | 4/14 | UCMR-5 |
| PFBS | 0.0032 µg/L No EPA limit set Highest in the ZIP: LAKES OF ROSEHILL WATER SYSTEM · 1,239 people · 2023 | 1/14 | UCMR-5 |
| PFHXS | 0.0031 µg/L No EPA limit set Highest in the ZIP: LAKES OF ROSEHILL WATER SYSTEM · 1,239 people · 2023 | 1/14 | 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 77429
| Supplier | State | Population served |
|---|---|---|
| NORTHWEST HARRIS COUNTY MUD 5 | TX | 25,425 |
| HARRIS COUNTY FWSD 61 | TX | 15,400 |
| CYPRESS HILL MUD 1 | TX | 11,052 |
| FAULKEY GULLY MUD | TX | 8,907 |
| HARRIS COUNTY MUD 391 | TX | 8,835 |
| NORTHWEST HARRIS COUNTY MUD 9 | TX | 7,848 |
| NORTHWEST HARRIS COUNTY MUD 10 | TX | 7,671 |
| LAKE FOREST UTILITY DISTRICT | TX | 7,106 |
| HARRIS COUNTY MUD 364 | TX | 6,168 |
| HARRIS COUNTY MUD 360 | TX | 4,707 |
| HARRIS COUNTY MUD 365 | TX | 4,461 |
| HARRIS COUNTY MUD 69 | TX | 4,422 |
| HARRIS COUNTY MUD 18 HEATHERWOOD HUNTERS | TX | 4,083 |
| LAKES OF ROSEHILL WATER SYSTEM | TX | 1,239 |
Frequently asked questions about ZIP 77429 tap water
Is the tap water in ZIP 77429 safe to drink?
EPA testing detected 40 contaminants across the water suppliers serving ZIP 77429. 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 77429?
14 public water suppliers report EPA drinking-water monitoring for ZIP 77429. Each is listed above with its population served.
What contaminants are in ZIP 77429'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.