What was found in ZIP 77057
The highest level seen across the suppliers serving this ZIP, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Copper | 1930 µg/L 148% of the EPA limit, in the worst sample — 1300 µg/L | 2/2 | SYR4 |
| Nitrate | 1230 µg/L 12% of the EPA limit 10000 µg/L | 1/2 | SYR4 |
| Fluoride | 760 µg/L 19% of the EPA limit 4000 µg/L | 1/2 | SYR4 |
| Barium | 400 µg/L 20% of the EPA limit 2000 µg/L | 1/2 | SYR4 |
| Nitrate-Nitrite | 350 µg/L 3.5% of the EPA limit 10000 µg/L | 1/2 | SYR4 |
| Cyanide | 110 µg/L 55% of the EPA limit 200 µg/L | 1/2 | SYR4 |
| Chloroform | 82 µg/L No EPA limit set | 2/2 | SYR4 |
| TTHM | 75.8 µg/L 95% of the EPA limit 80 µg/L | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 73.2 µg/L 122% of the EPA limit, in the worst sample — 60 µg/L | 2/2 | SYR4 |
| Dichloroacetic Acid | 50.9 µg/L No EPA limit set | 2/2 | SYR4 |
| Lead | 48.9 µg/L 326% of the EPA limit, in the worst sample — 15 µg/L | 2/2 | SYR4 |
| Nitrite | 40 µg/L 4% of the EPA limit 1000 µg/L | 1/2 | SYR4 |
| Bromoform | 35.9 µg/L No EPA limit set | 2/2 | SYR4 |
| Bromodichloromethane | 34 µg/L No EPA limit set | 2/2 | SYR4 |
| Lithium | 33.9 µg/L No EPA limit set | 2/2 | UCMR-5 |
| Trichloroacetic Acid | 21.5 µg/L No EPA limit set | 2/2 | SYR4 |
| Dibromochloromethane | 20 µg/L No EPA limit set | 2/2 | SYR4 |
| Monochloroacetic Acid | 19.5 µg/L No EPA limit set | 2/2 | SYR4 |
| Combined Uranium | 16.9 µg/L 56% of the EPA limit 30 µg/L | 1/2 | SYR4 |
| Chromium | 14.3 µg/L 14% of the EPA limit 100 µg/L | 1/2 | SYR4 |
| Dibromoacetic Acid | 13.3 µg/L No EPA limit set | 2/2 | SYR4 |
| Xylenes, Total | 13 µg/L 0.1% of the EPA limit 10000 µg/L | 1/2 | SYR4 |
| Selenium | 12.9 µg/L 26% of the EPA limit 50 µg/L | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 11.1 pCi/L 74% of the EPA limit 15 pCi/L | 1/2 | SYR4 |
| Arsenic | 11 µg/L 110% of the EPA limit, in the worst sample — 10 µg/L | 1/2 | SYR4 |
| Gross Beta Particle Activity | 8.7 pCi/L No EPA limit set | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 5.3 pCi/L 106% of the EPA limit, in the worst sample — 5 pCi/L | 1/2 | SYR4 |
| Monobromoacetic Acid | 4.5 µg/L No EPA limit set | 2/2 | SYR4 |
| Ethylbenzene | 2.2 µg/L 0.3% of the EPA limit 700 µg/L | 1/2 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.8 µg/L 30% of the EPA limit 6 µg/L | 1/2 | SYR4 |
| Toluene | 1 µg/L 0.1% of the EPA limit 1000 µg/L | 1/2 | SYR4 |
| Atrazine | 0.9100 µg/L 30% of the EPA limit 3 µg/L | 1/2 | SYR4 |
| Dichloromethane | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/2 | SYR4 |
| Simazine | 0.2900 µg/L 7.2% of the EPA limit 4 µg/L | 1/2 | SYR4 |
| Hexachlorocyclopentadiene | 0.2400 µg/L 0.5% of the EPA limit 50 µg/L | 1/2 | SYR4 |
| 6:2 Fts | 0.0426 µg/L No EPA limit set | 1/2 | UCMR-5 |
| Benzo(A)Pyrene | 0.0400 µg/L 20% of the EPA limit 0.2000 µg/L | 1/2 | SYR4 |
| Pfba | 0.0127 µg/L No EPA limit set | 2/2 | UCMR-5 |
| Endrin | 0.0100 µg/L 0.5% of the EPA limit 2 µg/L | 1/2 | SYR4 |
| Pfpea | 0.0084 µg/L No EPA limit set | 2/2 | UCMR-5 |
| Pfhxa | 0.0070 µg/L No EPA limit set | 2/2 | UCMR-5 |
| Lead | 0.0050 mg/L 33% of the EPA limit 0.0150 mg/L | 2/2 | LCR |
| PFOS | 0.0049 µg/L No EPA limit set | 1/2 | UCMR-5 |
| PFHXS | 0.0043 µg/L No EPA limit set | 1/2 | UCMR-5 |
| PFBS | 0.0035 µg/L No EPA limit set | 1/2 | UCMR-5 |
| Pfhpa | 0.0033 µg/L No EPA limit set | 1/2 | 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 single worst sample on
record — over 100% is worth reading, but is not by itself a violation.
Formal violations are listed separately.
Water suppliers serving ZIP 77057
| Supplier | State | Population served |
|---|---|---|
| CITY OF HOUSTON | TX | 2,970,543 |
| CITY OF PASADENA | TX | 152,000 |
Frequently asked questions about ZIP 77057 tap water
Is the tap water in ZIP 77057 safe to drink?
EPA testing detected 46 contaminants across the water suppliers serving ZIP 77057. 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 77057?
2 public water suppliers report EPA drinking-water monitoring for ZIP 77057. Each is listed above with its population served.
What contaminants are in ZIP 77057's water?
EPA monitoring detected Copper, Nitrate, Fluoride, Barium, Nitrate-Nitrite, and others across this ZIP's suppliers. The full list with levels and sources is above.