Water report · not indexed
What is in the water at 77058
4 public water systems serve this ZIP code in the federal records. Everything below comes from EPA monitoring data, and everything missing is named.
CLEAR LAKE CITY WATER AUTHORITY
PWSID TX1010056 · TX · serves 89,702 people
PFAS and lithium
9 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 94 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 13 µg/L | 6 | 7/19/2023 |
| PFBA | 0.015 µg/L | 14 | 7/19/2023 |
| PFHxA | 0.0095 µg/L | 15 | 7/19/2023 |
| PFPeA | 0.0088 µg/L | 15 | 7/19/2023 |
| PFOS | 0.0067 µg/L | 12 | 7/19/2023 |
| PFHxS | 0.006 µg/L | 12 | 7/19/2023 |
| PFBS | 0.0057 µg/L | 12 | 7/19/2023 |
| PFOA | 0.004 µg/L | 1 | 10/23/2023 |
| PFHpA | 0.0037 µg/L | 7 | 4/20/2023 |
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.
CITY OF NASSAU BAY
PWSID TX1010152 · TX · serves 4,170 people
PFAS and lithium
4 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 16 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| 6:2 FTS | 0.0097 µg/L | 2 | 6/4/2025 |
| PFBA | 0.0071 µg/L | 6 | 6/4/2025 |
| PFPeA | 0.0047 µg/L | 4 | 6/4/2025 |
| PFHxA | 0.0045 µg/L | 4 | 6/4/2025 |
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.
CITY OF WEBSTER
PWSID TX1010226 · TX · serves 13,710 people
PFAS and lithium
7 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 21 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFBA | 0.011 µg/L | 4 | 9/18/2023 |
| PFPeA | 0.0099 µg/L | 4 | 9/18/2023 |
| PFHxA | 0.0091 µg/L | 4 | 9/18/2023 |
| PFOS | 0.0062 µg/L | 4 | 9/18/2023 |
| PFHxS | 0.0046 µg/L | 2 | 9/18/2023 |
| PFBS | 0.0046 µg/L | 2 | 9/18/2023 |
| PFHpA | 0.0032 µg/L | 1 | 12/27/2023 |
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.
NASA JOHNSON SPACE CENTER
PWSID TX1010250 · TX
PFAS and lithium
3 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 7 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFBA | 0.006 µg/L | 3 | 4/14/2025 |
| PFPeA | 0.0053 µg/L | 2 | 4/14/2025 |
| PFHxA | 0.0045 µg/L | 2 | 4/14/2025 |
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.