Water report · not indexed
What is in the water at 78046
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 LAREDO
PWSID TX2400001 · TX · serves 260,046 people
PFAS and lithium
2 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 13 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 34 µg/L | 8 | 9/11/2023 |
| PFBA | 0.011 µg/L | 5 | 9/11/2023 |
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
1 open health-based violation(s) recorded in SDWIS and not yet returned to compliance.
- MCL · contaminant code 8000 · began 2026-05-01
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.
WEBB COUNTY WATER UTILITIES
PWSID TX2400022 · TX · serves 8,358 people
PFAS and lithium
3 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 8 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 41 µg/L | 4 | 7/22/2024 |
| PFBA | 0.0051 µg/L | 2 | 7/22/2024 |
| PFPeA | 0.0034 µg/L | 2 | 7/22/2024 |
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
12 open health-based violation(s) recorded in SDWIS and not yet returned to compliance.
- 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
- MCL · contaminant code 2950 · began 2025-01-01
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.