Water report · not indexed
What is in the water at 77979
2 public water systems serve this ZIP code in the federal records. Everything below comes from EPA monitoring data, and everything missing is named.
CITY OF PORT LAVACA
PWSID TX0290002 · TX · serves 11,545 people
PFAS and lithium
8 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 23 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 15 µg/L | 3 | 7/25/2023 |
| PFPeA | 0.016 µg/L | 4 | 8/14/2024 |
| PFBA | 0.014 µg/L | 4 | 8/14/2024 |
| PFHxA | 0.01 µg/L | 4 | 8/14/2024 |
| PFHxS | 0.0072 µg/L | 3 | 8/14/2024 |
| PFBS | 0.0065 µg/L | 2 | 8/14/2024 |
| PFOA | 0.006 µg/L | 2 | 4/18/2023 |
| PFOS | 0.0047 µg/L | 1 | 4/18/2023 |
A detection is a measurement, not a violation and not a health finding. EPA states that UCMR 5 results do not indicate compliance or non-compliance with any limit.
Health-based violations
14 open health-based violation(s) recorded in SDWIS and not yet returned to compliance.
- MCL · contaminant code 2950 · began 2023-01-01
- MCL · contaminant code 2950 · began 2023-04-01
- MCL · contaminant code 2950 · began 2023-07-01
- MCL · contaminant code 2950 · began 2023-10-01
- MCL · contaminant code 2950 · began 2024-01-01
- MCL · contaminant code 2950 · began 2024-04-01
- MCL · contaminant code 2950 · began 2024-07-01
- MCL · contaminant code 2950 · began 2024-10-01
Hardness
No hardness measurement. Hardness is measured at environmental monitoring stations, and none fell inside this system’s service area. That is a gap in where monitoring happens, not a finding about the water.
GBRA CALHOUN COUNTY RURAL WATER SYSTEM
PWSID TX0290007 · TX · serves 4,482 people
PFAS and lithium
9 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 48 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 19 µg/L | 8 | 8/20/2024 |
| 6:2 FTS | 0.051 µg/L | 1 | 11/4/2024 |
| PFPeA | 0.014 µg/L | 8 | 8/20/2024 |
| PFBA | 0.0077 µg/L | 4 | 5/6/2024 |
| PFHxA | 0.0072 µg/L | 8 | 8/20/2024 |
| PFBS | 0.0054 µg/L | 8 | 8/20/2024 |
| PFOS | 0.005 µg/L | 1 | 8/20/2024 |
| PFOA | 0.0048 µg/L | 2 | 8/20/2024 |
| PFHxS | 0.0047 µg/L | 8 | 8/20/2024 |
A detection is a measurement, not a violation and not a health finding. EPA states that UCMR 5 results do not indicate compliance or non-compliance with any limit.
Health-based violations
11 open health-based violation(s) recorded in SDWIS and not yet returned to compliance.
- MCL · contaminant code 2950 · began 2023-10-01
- MCL · contaminant code 2950 · began 2024-01-01
- MCL · contaminant code 2950 · began 2024-04-01
- MCL · contaminant code 2950 · began 2024-07-01
- MCL · contaminant code 2950 · began 2024-10-01
- MCL · contaminant code 2950 · began 2025-01-01
- MCL · contaminant code 2950 · began 2025-04-01
- MCL · contaminant code 2950 · began 2025-07-01
Hardness
No hardness measurement. Hardness is measured at environmental monitoring stations, and none fell inside this system’s service area. That is a gap in where monitoring happens, not a finding about the water.
What this report cannot tell you
Every figure describes water at a sampling point: a treatment plant, an entry point to the distribution system, or a monitoring station. None of it describes water arriving at your tap. Plumbing between the two can add lead and copper, and if your home was built before 1986 a test kit tells you something no federal dataset can.
Sources: EPA UCMR 5 occurrence (final release, frozen July 2026) · EPA SDWIS health-based violations · USGS and state monitoring via the Water Quality Portal · EPA Public Water System Service Area Boundaries v3. Compiled 2026-09-01.