What was found in ZIP 77493
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 | 440 µg/L 11% of the EPA limit 4000 µg/L Main supplier: CITY OF KATY · 25,253 people · 2018
Highest in the ZIP: 649 µg/L — HARRIS COUNTY MUD 65 · 6,330 people · 2018 | 3/3 | SYR4 |
| 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: 313 µg/L — HARRIS COUNTY MUD 65 · 6,330 people · 2017 | 3/3 | SYR4 |
| Barium | 187.85 µg/L 9.4% of the EPA limit 2000 µg/L Main supplier: CITY OF KATY · 25,253 people · 2019 | 3/3 | SYR4 |
| Lithium | 24.3 µg/L No EPA limit set Main supplier: CITY OF KATY · 25,253 people · 2024
Highest in the ZIP: 41.3 µg/L — HARRIS COUNTY MUD 495 · 5,007 people · 2024 | 3/3 | UCMR-5 |
| Nitrate | 30 µg/L 0.3% of the EPA limit 10000 µg/L Main supplier: CITY OF KATY · 25,253 people · 2019 | 3/3 | 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 | 2/3 | SYR4 |
| Combined Uranium | 13.05 µg/L 44% of the EPA limit 30 µg/L Main supplier: CITY OF KATY · 25,253 people · 2019 | 1/3 | 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 | 2/3 | 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: 9.595 µg/L — HARRIS COUNTY MUD 495 · 5,007 people · 2019 | 3/3 | 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 | 1/3 | SYR4 |
| Lead | 8.08 µg/L 54% of the EPA limit 15 µg/L Main supplier: CITY OF KATY · 25,253 people · 2019 | 2/3 | SYR4 |
| Gross Beta Particle Activity | 7.44 pCi/L No EPA limit set Main supplier: CITY OF KATY · 25,253 people · 2019 | 1/3 | SYR4 |
| Selenium | 7.25 µg/L 14% of the EPA limit 50 µg/L Main supplier: CITY OF KATY · 25,253 people · 2019 | 3/3 | 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: 3.225 µg/L — HARRIS COUNTY MUD 65 · 6,330 people · 2019 | 3/3 | 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 | 1/3 | SYR4 |
| Bromoform | 1.975 µg/L No EPA limit set Main supplier: CITY OF KATY · 25,253 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 1.56 µg/L No EPA limit set Main supplier: CITY OF KATY · 25,253 people · 2019
Highest in the ZIP: 1.675 µg/L — HARRIS COUNTY MUD 495 · 5,007 people · 2019 | 3/3 | SYR4 |
| Ethylbenzene | 1.42 µg/L 0.2% of the EPA limit 700 µg/L Main supplier: CITY OF KATY · 25,253 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 1.2 µg/L No EPA limit set Main supplier: CITY OF KATY · 25,253 people · 2019 | 2/3 | 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 | 2/3 | SYR4 |
| Lead | 0.0027 mg/L 18% of the EPA limit 0.0150 mg/L Main supplier: CITY OF KATY · 25,253 people · 2023 | 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 77493
| Supplier | State | Population served |
|---|---|---|
| CITY OF KATY | TX | 25,253 |
| HARRIS COUNTY MUD 65 | TX | 6,330 |
| HARRIS COUNTY MUD 495 | TX | 5,007 |
Frequently asked questions about ZIP 77493 tap water
Is the tap water in ZIP 77493 safe to drink?
EPA testing detected 21 contaminants across the water suppliers serving ZIP 77493. 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 77493?
3 public water suppliers report EPA drinking-water monitoring for ZIP 77493. Each is listed above with its population served.
What contaminants are in ZIP 77493's water?
EPA monitoring detected Fluoride, Copper, Barium, Lithium, Nitrate, and others across this ZIP's suppliers. The full list with levels and sources is above.