What was found in ZIP 77494
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 |
|---|---|---|---|
| Copper | 188 µg/L 14% of the EPA limit 1300 µg/L Main supplier: CITY OF KATY · 25,253 people · 2019
Highest in the ZIP: 1900 µg/L — UNITED WATER SYSTEM · 4,446 people · 2019 | 17/17 | SYR4 |
| Nitrate | 30 µg/L 0.3% of the EPA limit 10000 µg/L Main supplier: CITY OF KATY · 25,253 people · 2019
Highest in the ZIP: 870 µg/L — FORT BEND COUNTY MUD 57 · 5,335 people · 2019 | 7/17 | SYR4 |
| Nitrate-Nitrite | 28.5 µg/L 0.3% of the EPA limit 10000 µg/L Main supplier: CITY OF KATY · 25,253 people · 2015
Highest in the ZIP: 827 µg/L — FORT BEND COUNTY MUD 57 · 5,335 people · 2015 | 8/17 | SYR4 |
| Fluoride | 440 µg/L 11% of the EPA limit 4000 µg/L Main supplier: CITY OF KATY · 25,253 people · 2018
Highest in the ZIP: 600 µg/L — FORT BEND COUNTY MUD 58 · 10,629 people · 2018 | 10/17 | SYR4 |
| Barium | 187.85 µg/L 9.4% of the EPA limit 2000 µg/L Main supplier: CITY OF KATY · 25,253 people · 2019
Highest in the ZIP: 512.5 µg/L — UNITED WATER SYSTEM · 4,446 people · 2018 | 10/17 | SYR4 |
| Cyanide | 163 µg/L 82% of the EPA limit 200 µg/L Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2017 | 3/17 | SYR4 |
| TTHM | 2.74 µg/L 3.4% of the EPA limit 80 µg/L Main supplier: CITY OF KATY · 25,253 people · 2019
Highest in the ZIP: 63.415 µg/L — UNITED WATER SYSTEM · 4,446 people · 2019 | 13/17 | SYR4 |
| Total Haloacetic Acids (HAA5) | 1.2 µg/L 2% of the EPA limit 60 µg/L Main supplier: CITY OF KATY · 25,253 people · 2019
Highest in the ZIP: 48.28 µg/L — CINCO SOUTHWEST MUD 3 DAYCARE · 5,187 people · 2019 | 12/17 | SYR4 |
| Chloroform | 44.835 µg/L No EPA limit set Highest in the ZIP: UNITED WATER SYSTEM · 4,446 people · 2019 | 11/17 | SYR4 |
| Arsenic | 3.5 µg/L 35% of the EPA limit 10 µg/L Main supplier: CITY OF KATY · 25,253 people · 2019
Highest in the ZIP: 35.8 µg/L — UNITED WATER SYSTEM · 4,446 people · 2019 | 8/17 | SYR4 |
| Dichloroacetic Acid | 33.1 µg/L No EPA limit set Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2019 | 11/17 | SYR4 |
| Lithium | 24.3 µg/L No EPA limit set Main supplier: CITY OF KATY · 25,253 people · 2024
Highest in the ZIP: 32.3 µg/L — FORT BEND COUNTY MUD 58 · 10,629 people · 2025 | 17/17 | UCMR-5 |
| Trichloroacetic Acid | 25.7 µg/L No EPA limit set Highest in the ZIP: UNITED WATER SYSTEM · 4,446 people · 2019 | 11/17 | SYR4 |
| Lead | 8.08 µg/L 54% of the EPA limit 15 µg/L Main supplier: CITY OF KATY · 25,253 people · 2019
Highest in the ZIP: 20.64 µg/L — FORT BEND COUNTY MUD 34 · 5,367 people · 2019 | 16/17 | SYR4 |
| Bromodichloromethane | 16.86 µg/L No EPA limit set Highest in the ZIP: CINCO SOUTHWEST MUD 3 DAYCARE · 5,187 people · 2019 | 11/17 | SYR4 |
| Combined Uranium | 13.05 µg/L 44% of the EPA limit 30 µg/L Main supplier: CITY OF KATY · 25,253 people · 2019 | 6/17 | SYR4 |
| Gross Alpha, Excl. Radon And U | 11.75 pCi/L 78% of the EPA limit 15 pCi/L Main supplier: CITY OF KATY · 25,253 people · 2019 | 5/17 | SYR4 |
| Dibromochloromethane | 1.56 µg/L No EPA limit set Main supplier: CITY OF KATY · 25,253 people · 2019
Highest in the ZIP: 10.62 µg/L — FORT BEND COUNTY MUD 142 · 11,595 people · 2019 | 13/17 | SYR4 |
| Chromium | 10 µg/L 10% of the EPA limit 100 µg/L Highest in the ZIP: UNITED WATER SYSTEM · 4,446 people · 2017 | 1/17 | SYR4 |
| Bromoform | 1.975 µg/L No EPA limit set Main supplier: CITY OF KATY · 25,253 people · 2019
Highest in the ZIP: 9.8 µg/L — FORT BEND COUNTY MUD 142 · 11,595 people · 2019 | 10/17 | SYR4 |
| Xylenes, Total | 8.29 µg/L 0.1% of the EPA limit 10000 µg/L Main supplier: CITY OF KATY · 25,253 people · 2019 | 1/17 | SYR4 |
| Monobromoacetic Acid | 8 µg/L No EPA limit set Highest in the ZIP: CINCO SOUTHWEST MUD 3 DAYCARE · 5,187 people · 2019 | 2/17 | SYR4 |
| Gross Beta Particle Activity | 7.44 pCi/L No EPA limit set Main supplier: CITY OF KATY · 25,253 people · 2019 | 9/17 | SYR4 |
| Selenium | 7.25 µg/L 14% of the EPA limit 50 µg/L Main supplier: CITY OF KATY · 25,253 people · 2019 | 3/17 | SYR4 |
| Monochloroacetic Acid | 6.9 µg/L No EPA limit set Highest in the ZIP: CINCO SOUTHWEST MUD 3 DAYCARE · 5,187 people · 2019 | 6/17 | SYR4 |
| Dibromoacetic Acid | 1.2 µg/L No EPA limit set Main supplier: CITY OF KATY · 25,253 people · 2019
Highest in the ZIP: 4.775 µg/L — FORT BEND COUNTY MUD 142 · 11,595 people · 2019 | 12/17 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 3.2485 µg/L 54% of the EPA limit 6 µg/L Highest in the ZIP: UNITED WATER SYSTEM · 4,446 people · 2017 | 2/17 | SYR4 |
| Combined Radium (-226 And -228) | 2.13 pCi/L 43% of the EPA limit 5 pCi/L Main supplier: CITY OF KATY · 25,253 people · 2019
Highest in the ZIP: 2.7 pCi/L — FORT BEND COUNTY MUD 124 · 2,544 people · 2017 | 9/17 | SYR4 |
| Ethylbenzene | 1.42 µg/L 0.2% of the EPA limit 700 µg/L Main supplier: CITY OF KATY · 25,253 people · 2019 | 1/17 | SYR4 |
| Atrazine | 0.3285 µg/L 11% of the EPA limit 3 µg/L Highest in the ZIP: FORT BEND COUNTY MUD 34 · 5,367 people · 2019 | 4/17 | SYR4 |
| Simazine | 0.2785 µg/L 7% of the EPA limit 4 µg/L Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2019 | 3/17 | SYR4 |
| 2,4-D | 0.1000 µg/L 0.1% of the EPA limit 70 µg/L Highest in the ZIP: FORT BEND COUNTY MUD 57 · 5,335 people · 2019 | 1/17 | SYR4 |
| Pfba | 0.0205 µg/L No EPA limit set Highest in the ZIP: FORT BEND COUNTY MUD 57 · 5,335 people · 2024 | 6/17 | UCMR-5 |
| Pfhxa | 0.0091 µg/L No EPA limit set Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2023 | 6/17 | UCMR-5 |
| Pfpea | 0.0088 µg/L No EPA limit set Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2023 | 7/17 | UCMR-5 |
| 6:2 Fts | 0.0079 µg/L No EPA limit set Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2023 | 1/17 | UCMR-5 |
| PFOS | 0.0042 µg/L No EPA limit set Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2023 | 1/17 | UCMR-5 |
| Lead | 0.0027 mg/L 18% of the EPA limit 0.0150 mg/L Main supplier: CITY OF KATY · 25,253 people · 2023
Highest in the ZIP: 0.0042 mg/L — FORT BEND COUNTY MUD 34 · 5,367 people · 2023 | 17/17 | LCR |
| PFBS | 0.0040 µg/L No EPA limit set Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2023 | 2/17 | UCMR-5 |
| PFHXS | 0.0038 µg/L No EPA limit set Highest in the ZIP: FORT BEND COUNTY MUD 142 · 11,595 people · 2023 | 1/17 | 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 77494
| Supplier | State | Population served |
|---|---|---|
| CITY OF KATY | TX | 25,253 |
| FORT BEND COUNTY MUD 142 | TX | 11,595 |
| FORT BEND COUNTY MUD 58 | TX | 10,629 |
| FORT BEND COUNTY MUD 151 | TX | 10,233 |
| HARRIS-FORT BEND COUNTIES MUD 3 | TX | 9,297 |
| FORT BEND COUNTY MUD 35 | TX | 6,297 |
| CINCO MUD 14 | TX | 6,192 |
| CINCO SOUTHWEST MUD 4 | TX | 6,093 |
| CINCO SOUTHWEST MUD 2 | TX | 5,496 |
| FORT BEND COUNTY MUD 34 | TX | 5,367 |
| FORT BEND COUNTY MUD 57 | TX | 5,335 |
| CINCO SOUTHWEST MUD 3 DAYCARE | TX | 5,187 |
| HARRIS FORT BEND COUNTIES MUD 5 | TX | 4,641 |
| UNITED WATER SYSTEM | LA | 4,446 |
| CINCO MUD 9 | TX | 3,828 |
| HARRIS FORT BEND COUNTIES MUD 1 | TX | 3,812 |
| FORT BEND COUNTY MUD 124 | TX | 2,544 |
Frequently asked questions about ZIP 77494 tap water
Is the tap water in ZIP 77494 safe to drink?
EPA testing detected 40 contaminants across the water suppliers serving ZIP 77494. 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 77494?
17 public water suppliers report EPA drinking-water monitoring for ZIP 77494. Each is listed above with its population served.
What contaminants are in ZIP 77494's water?
EPA monitoring detected Copper, Nitrate, Nitrate-Nitrite, Fluoride, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.