What was found in ZIP 77979
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 | 675 µg/L 52% of the EPA limit 1300 µg/L Main supplier: CITY OF PORT LAVACA · 12,000 people · 2019 | 2/2 | SYR4 |
| TTHM | 110.85 µg/L 139% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: CITY OF PORT LAVACA · 12,000 people · 2019 | 2/2 | SYR4 |
| Chloroform | 60.04 µg/L No EPA limit set Main supplier: CITY OF PORT LAVACA · 12,000 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 58.84 µg/L 98% of the EPA limit 60 µg/L Main supplier: CITY OF PORT LAVACA · 12,000 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 40.385 µg/L No EPA limit set Main supplier: CITY OF PORT LAVACA · 12,000 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 36.94 µg/L No EPA limit set Main supplier: CITY OF PORT LAVACA · 12,000 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 35.91 µg/L No EPA limit set Main supplier: CITY OF PORT LAVACA · 12,000 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 21.86 µg/L No EPA limit set Main supplier: CITY OF PORT LAVACA · 12,000 people · 2019 | 2/2 | SYR4 |
| Lithium | 14.9 µg/L No EPA limit set Main supplier: CITY OF PORT LAVACA · 12,000 people · 2024
Highest in the ZIP: 19.3 µg/L — GBRA CALHOUN COUNTY RURAL WATER SYSTEM · 4,482 people · 2024 | 2/2 | UCMR-5 |
| Bromoform | 11.56 µg/L No EPA limit set Main supplier: CITY OF PORT LAVACA · 12,000 people · 2019
Highest in the ZIP: 11.92 µg/L — GBRA CALHOUN COUNTY RURAL WATER SYSTEM · 4,482 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 9.9 µg/L No EPA limit set Main supplier: CITY OF PORT LAVACA · 12,000 people · 2019 | 2/2 | SYR4 |
| Lead | 4.41 µg/L 29% of the EPA limit 15 µg/L Main supplier: CITY OF PORT LAVACA · 12,000 people · 2019
Highest in the ZIP: 9.16 µg/L — GBRA CALHOUN COUNTY RURAL WATER SYSTEM · 4,482 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 8.655 µg/L No EPA limit set Main supplier: CITY OF PORT LAVACA · 12,000 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 6.05 µg/L No EPA limit set Main supplier: CITY OF PORT LAVACA · 12,000 people · 2019 | 2/2 | SYR4 |
| 6:2 Fts | 0.0510 µg/L No EPA limit set Highest in the ZIP: GBRA CALHOUN COUNTY RURAL WATER SYSTEM · 4,482 people · 2024 | 1/2 | UCMR-5 |
| Pfpea | 0.0163 µg/L No EPA limit set Main supplier: CITY OF PORT LAVACA · 12,000 people · 2024 | 2/2 | UCMR-5 |
| Pfba | 0.0142 µg/L No EPA limit set Main supplier: CITY OF PORT LAVACA · 12,000 people · 2024 | 2/2 | UCMR-5 |
| Pfhxa | 0.0100 µg/L No EPA limit set Main supplier: CITY OF PORT LAVACA · 12,000 people · 2024 | 2/2 | UCMR-5 |
| PFHXS | 0.0072 µg/L No EPA limit set Main supplier: CITY OF PORT LAVACA · 12,000 people · 2024 | 2/2 | UCMR-5 |
| PFBS | 0.0065 µg/L No EPA limit set Main supplier: CITY OF PORT LAVACA · 12,000 people · 2024 | 2/2 | UCMR-5 |
| PFOA | 0.0060 µg/L No EPA limit set Main supplier: CITY OF PORT LAVACA · 12,000 people · 2024 | 2/2 | UCMR-5 |
| PFOS | 0.0047 µg/L No EPA limit set Main supplier: CITY OF PORT LAVACA · 12,000 people · 2024
Highest in the ZIP: 0.0050 µg/L — GBRA CALHOUN COUNTY RURAL WATER SYSTEM · 4,482 people · 2024 | 2/2 | UCMR-5 |
| Lead | 0.0023 mg/L 15% of the EPA limit 0.0150 mg/L Main supplier: CITY OF PORT LAVACA · 12,000 people · 2024 | 2/2 | 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 77979
| Supplier | State | Population served |
|---|---|---|
| CITY OF PORT LAVACA | TX | 12,000 |
| GBRA CALHOUN COUNTY RURAL WATER SYSTEM | TX | 4,482 |
Frequently asked questions about ZIP 77979 tap water
Is the tap water in ZIP 77979 safe to drink?
EPA testing detected 23 contaminants across the water suppliers serving ZIP 77979. 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 77979?
2 public water suppliers report EPA drinking-water monitoring for ZIP 77979. Each is listed above with its population served.
What contaminants are in ZIP 77979's water?
EPA monitoring detected Copper, TTHM, Chloroform, Total Haloacetic Acids (HAA5), Bromodichloromethane, and others across this ZIP's suppliers. The full list with levels and sources is above.