What was found in ZIP 77090
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 | 2390 µg/L 184% of the EPA limit, in the worst sample — 1300 µg/L | 6/6 | SYR4 |
| Nitrate-Nitrite | 1770 µg/L 18% of the EPA limit 10000 µg/L | 6/6 | SYR4 |
| Nitrate | 1750 µg/L 18% of the EPA limit 10000 µg/L | 6/6 | SYR4 |
| Fluoride | 760 µg/L 19% of the EPA limit 4000 µg/L | 6/6 | SYR4 |
| Barium | 400 µg/L 20% of the EPA limit 2000 µg/L | 6/6 | SYR4 |
| Lead | 312.7 µg/L 2085% of the EPA limit, in the worst sample — 15 µg/L | 6/6 | SYR4 |
| Nitrite | 220 µg/L 22% of the EPA limit 1000 µg/L | 5/6 | SYR4 |
| Cyanide | 120 µg/L 60% of the EPA limit 200 µg/L | 5/6 | SYR4 |
| TTHM | 75.8 µg/L 95% of the EPA limit 80 µg/L | 5/6 | SYR4 |
| Total Haloacetic Acids (HAA5) | 73.1 µg/L 122% of the EPA limit, in the worst sample — 60 µg/L | 5/6 | SYR4 |
| Chloroform | 67.3 µg/L No EPA limit set | 6/6 | SYR4 |
| Dichloroacetic Acid | 50.9 µg/L No EPA limit set | 5/6 | SYR4 |
| Lithium | 34.7 µg/L No EPA limit set | 5/6 | UCMR-5 |
| Gross Alpha, Excl. Radon And U | 22.5 pCi/L 150% of the EPA limit, in the worst sample — 15 pCi/L | 4/6 | SYR4 |
| Trichloroacetic Acid | 21.5 µg/L No EPA limit set | 5/6 | SYR4 |
| Dibromochloromethane | 20 µg/L No EPA limit set | 6/6 | SYR4 |
| Combined Uranium | 16.9 µg/L 56% of the EPA limit 30 µg/L | 4/6 | SYR4 |
| Bromodichloromethane | 16.6 µg/L No EPA limit set | 6/6 | SYR4 |
| Chromium | 14.3 µg/L 14% of the EPA limit 100 µg/L | 1/6 | SYR4 |
| Dibromoacetic Acid | 13.3 µg/L No EPA limit set | 5/6 | SYR4 |
| Xylenes, Total | 13 µg/L 0.1% of the EPA limit 10000 µg/L | 2/6 | SYR4 |
| Selenium | 12.9 µg/L 26% of the EPA limit 50 µg/L | 2/6 | SYR4 |
| Gross Beta Particle Activity | 12.1 pCi/L No EPA limit set | 5/6 | SYR4 |
| Monochloroacetic Acid | 11.9 µg/L No EPA limit set | 5/6 | SYR4 |
| Arsenic | 11 µg/L 110% of the EPA limit, in the worst sample — 10 µg/L | 4/6 | SYR4 |
| Bromoform | 11 µg/L No EPA limit set | 5/6 | SYR4 |
| Combined Radium (-226 And -228) | 5.3 pCi/L 106% of the EPA limit, in the worst sample — 5 pCi/L | 4/6 | SYR4 |
| Monobromoacetic Acid | 4.5 µg/L No EPA limit set | 1/6 | SYR4 |
| Ethylbenzene | 2.2 µg/L 0.3% of the EPA limit 700 µg/L | 1/6 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.9 µg/L 32% of the EPA limit 6 µg/L | 4/6 | SYR4 |
| Atrazine | 1.8 µg/L 60% of the EPA limit 3 µg/L | 5/6 | SYR4 |
| Toluene | 1 µg/L 0.1% of the EPA limit 1000 µg/L | 1/6 | SYR4 |
| Dichloromethane | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/6 | SYR4 |
| Simazine | 0.3000 µg/L 7.5% of the EPA limit 4 µg/L | 4/6 | SYR4 |
| Hexachlorocyclopentadiene | 0.2400 µg/L 0.5% of the EPA limit 50 µg/L | 1/6 | SYR4 |
| Methoxychlor | 0.1400 µg/L 0.4% of the EPA limit 40 µg/L | 1/6 | SYR4 |
| 6:2 Fts | 0.0426 µg/L No EPA limit set | 1/6 | UCMR-5 |
| Benzo(A)Pyrene | 0.0400 µg/L 20% of the EPA limit 0.2000 µg/L | 1/6 | SYR4 |
| Pfba | 0.0106 µg/L No EPA limit set | 4/6 | UCMR-5 |
| Endrin | 0.0100 µg/L 0.5% of the EPA limit 2 µg/L | 1/6 | SYR4 |
| Lead | 0.0085 mg/L 57% of the EPA limit 0.0150 mg/L | 6/6 | LCR |
| Pfpea | 0.0067 µg/L No EPA limit set | 2/6 | UCMR-5 |
| Pfhxa | 0.0051 µg/L No EPA limit set | 3/6 | 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 77090
| Supplier | State | Population served |
|---|---|---|
| CITY OF HOUSTON | TX | 2,970,543 |
| CNP UTILITY DISTRICT | TX | 14,718 |
| PONDEROSA FOREST UTILITY DISTRICT | TX | 10,101 |
| HARRIS COUNTY MUD 189 | TX | 6,906 |
| HARRIS COUNTY MUD 86 | TX | 5,397 |
| WESTADOR MUD | TX | 5,337 |
Frequently asked questions about ZIP 77090 tap water
Is the tap water in ZIP 77090 safe to drink?
EPA testing detected 43 contaminants across the water suppliers serving ZIP 77090. 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 77090?
6 public water suppliers report EPA drinking-water monitoring for ZIP 77090. Each is listed above with its population served.
What contaminants are in ZIP 77090's water?
EPA monitoring detected Copper, Nitrate-Nitrite, Nitrate, Fluoride, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.