Water report · not indexed
What is in the water at 79510
3 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 CLYDE
PWSID TX0300002 · TX
PFAS and lithium
10 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 27 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 15 µg/L | 2 | 9/9/2025 |
| PFHxS | 0.023 µg/L | 2 | 9/9/2025 |
| PFHxA | 0.016 µg/L | 2 | 9/9/2025 |
| PFOS | 0.015 µg/L | 2 | 9/9/2025 |
| PFBA | 0.015 µg/L | 8 | 9/9/2025 |
| PFPeA | 0.015 µg/L | 2 | 9/9/2025 |
| PFHpA | 0.0076 µg/L | 2 | 9/9/2025 |
| PFBS | 0.0062 µg/L | 4 | 9/9/2025 |
| 6:2 FTS | 0.0062 µg/L | 2 | 6/3/2025 |
| PFOA | 0.0057 µg/L | 1 | 3/5/2025 |
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
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
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.
EULA WSC
PWSID TX0300005 · TX · serves 3,918 people
PFAS and lithium
9 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 31 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 12 µg/L | 2 | 3/1/2023 |
| PFBA | 0.031 µg/L | 5 | 8/22/2023 |
| PFHxS | 0.021 µg/L | 4 | 8/22/2023 |
| PFOS | 0.02 µg/L | 3 | 8/22/2023 |
| PFHxA | 0.016 µg/L | 3 | 8/22/2023 |
| PFPeA | 0.013 µg/L | 4 | 8/22/2023 |
| PFHpA | 0.0075 µg/L | 3 | 8/22/2023 |
| PFOA | 0.0062 µg/L | 2 | 8/22/2023 |
| PFBS | 0.0059 µg/L | 5 | 8/22/2023 |
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
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
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.
POTOSI WSC
PWSID TX2210008 · TX · serves 7,413 people
PFAS and lithium
9 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 35 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 15 µg/L | 4 | 7/23/2025 |
| PFBA | 0.022 µg/L | 4 | 7/23/2025 |
| PFOS | 0.021 µg/L | 4 | 7/23/2025 |
| PFHxS | 0.02 µg/L | 4 | 7/23/2025 |
| PFHxA | 0.016 µg/L | 4 | 7/23/2025 |
| PFPeA | 0.014 µg/L | 4 | 7/23/2025 |
| PFHpA | 0.0087 µg/L | 4 | 7/23/2025 |
| PFOA | 0.0067 µg/L | 3 | 7/23/2025 |
| PFBS | 0.0061 µg/L | 4 | 7/23/2025 |
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
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
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.