What was found in ZIP 77331
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 | 791 µg/L 20% of the EPA limit 4000 µg/L Main supplier: SAN JACINTO SUD · 3,993 people · 2019 | 1/1 | SYR4 |
| Copper | 98.04 µg/L 7.5% of the EPA limit 1300 µg/L Main supplier: SAN JACINTO SUD · 3,993 people · 2019 | 1/1 | SYR4 |
| Barium | 71.45 µg/L 3.6% of the EPA limit 2000 µg/L Main supplier: SAN JACINTO SUD · 3,993 people · 2019 | 1/1 | SYR4 |
| Lithium | 59.5 µg/L No EPA limit set Main supplier: SAN JACINTO SUD · 3,993 people · 2023 | 1/1 | UCMR-5 |
| Nitrate | 42.5 µg/L 0.4% of the EPA limit 10000 µg/L Main supplier: SAN JACINTO SUD · 3,993 people · 2019 | 1/1 | SYR4 |
| Nitrate-Nitrite | 38.5 µg/L 0.4% of the EPA limit 10000 µg/L Main supplier: SAN JACINTO SUD · 3,993 people · 2015 | 1/1 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 31 µg/L 517% of the EPA limit, at the 95th percentile of samples — 6 µg/L Main supplier: SAN JACINTO SUD · 3,993 people · 2019 | 1/1 | SYR4 |
| TTHM | 9.13 µg/L 11% of the EPA limit 80 µg/L Main supplier: SAN JACINTO SUD · 3,993 people · 2019 | 1/1 | SYR4 |
| Arsenic | 8.08 µg/L 81% of the EPA limit 10 µg/L Main supplier: SAN JACINTO SUD · 3,993 people · 2019 | 1/1 | SYR4 |
| Bromoform | 4.72 µg/L No EPA limit set Main supplier: SAN JACINTO SUD · 3,993 people · 2019 | 1/1 | SYR4 |
| Lead | 4.476 µg/L 30% of the EPA limit 15 µg/L Main supplier: SAN JACINTO SUD · 3,993 people · 2019 | 1/1 | SYR4 |
| Selenium | 4.2 µg/L 8.4% of the EPA limit 50 µg/L Main supplier: SAN JACINTO SUD · 3,993 people · 2019 | 1/1 | SYR4 |
| Xylenes, Total | 4.08 µg/L 0% of the EPA limit 10000 µg/L Main supplier: SAN JACINTO SUD · 3,993 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 3.94 µg/L No EPA limit set Main supplier: SAN JACINTO SUD · 3,993 people · 2019 | 1/1 | SYR4 |
| Di(2-ethylhexyl) Adipate | 2.3 µg/L 0.6% of the EPA limit 400 µg/L Main supplier: SAN JACINTO SUD · 3,993 people · 2019 | 1/1 | SYR4 |
| Gross Alpha, Excl. Radon And U | 2.3 pCi/L 15% of the EPA limit 15 pCi/L Main supplier: SAN JACINTO SUD · 3,993 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 1.7 µg/L No EPA limit set Main supplier: SAN JACINTO SUD · 3,993 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 1.7 µg/L 2.8% of the EPA limit 60 µg/L Main supplier: SAN JACINTO SUD · 3,993 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 1.595 µg/L No EPA limit set Main supplier: SAN JACINTO SUD · 3,993 people · 2019 | 1/1 | SYR4 |
| Toluene | 0.9500 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: SAN JACINTO SUD · 3,993 people · 2019 | 1/1 | SYR4 |
| Ethylbenzene | 0.6000 µg/L 0.1% of the EPA limit 700 µg/L Main supplier: SAN JACINTO SUD · 3,993 people · 2019 | 1/1 | SYR4 |
| Pfhxa | 0.0033 µg/L No EPA limit set Main supplier: SAN JACINTO SUD · 3,993 people · 2023 | 1/1 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: SAN JACINTO SUD · 3,993 people · 2024 | 1/1 | 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 77331
| Supplier | State | Population served |
|---|---|---|
| SAN JACINTO SUD | TX | 3,993 |
Frequently asked questions about ZIP 77331 tap water
Is the tap water in ZIP 77331 safe to drink?
EPA testing detected 23 contaminants across the water suppliers serving ZIP 77331. 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 77331?
1 public water supplier report EPA drinking-water monitoring for ZIP 77331. Each is listed above with its population served.
What contaminants are in ZIP 77331'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.