Water report · not indexed
What is in the water at 77015
7 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 HOUSTON
PWSID TX1010013 · TX · serves 2,202,531 people
PFAS and lithium
5 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 115 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 34 µg/L | 69 | 8/31/2023 |
| 6:2 FTS | 0.043 µg/L | 10 | 3/8/2023 |
| PFBA | 0.011 µg/L | 9 | 3/6/2023 |
| PFPeA | 0.0067 µg/L | 11 | 5/1/2023 |
| PFHxA | 0.0051 µg/L | 16 | 8/31/2023 |
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
Median hardness 161 mg/L as CaCO₃, measured at 34 stations serving this system across 34 results, 2015-01-12 to 2016-08-09. Measured in the water source and distribution area, not at a tap, and not in your home.
HARRIS COUNTY FWSD 51
PWSID TX1010238 · TX · serves 18,888 people
PFAS and lithium
5 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 14 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 12 µg/L | 1 | 4/28/2025 |
| PFBA | 0.0072 µg/L | 3 | 5/14/2025 |
| PFPeA | 0.0055 µg/L | 4 | 5/14/2025 |
| PFHxA | 0.0048 µg/L | 4 | 5/14/2025 |
| PFBS | 0.0035 µg/L | 2 | 5/14/2025 |
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.
HARRIS COUNTY WCID 36
PWSID TX1010239 · TX · serves 11,073 people
PFAS and lithium
6 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 18 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 15 µg/L | 9 | 7/18/2024 |
| PFBA | 0.0061 µg/L | 1 | 1/8/2025 |
| PFPeA | 0.0061 µg/L | 3 | 7/18/2024 |
| PFHxA | 0.0057 µg/L | 3 | 7/18/2024 |
| PFOS | 0.004 µg/L | 1 | 7/18/2024 |
| PFBS | 0.003 µg/L | 1 | 1/8/2025 |
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.
HARRIS COUNTY FWSD 47
PWSID TX1010260 · TX · serves 4,500 people
PFAS and lithium
4 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 7 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 17 µg/L | 3 | 4/17/2024 |
| PFBA | 0.0065 µg/L | 1 | 7/24/2024 |
| PFPeA | 0.0036 µg/L | 1 | 1/17/2024 |
| PFHxA | 0.0033 µg/L | 2 | 7/24/2024 |
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
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.
HARRIS COUNTY MUD 8
PWSID TX1010712 · TX
PFAS and lithium
6 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 18 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFBA | 0.018 µg/L | 3 | 6/14/2023 |
| PFHxA | 0.0091 µg/L | 4 | 6/14/2023 |
| PFPeA | 0.0083 µg/L | 4 | 6/14/2023 |
| PFOS | 0.0046 µg/L | 2 | 6/14/2023 |
| PFBS | 0.0045 µg/L | 2 | 12/13/2023 |
| PFHxS | 0.0043 µg/L | 3 | 6/14/2023 |
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.
HARRIS COUNTY MUD 53
PWSID TX1010720 · TX · serves 17,856 people
PFAS and lithium
5 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 17 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFBA | 0.0078 µg/L | 6 | 6/21/2024 |
| PFPeA | 0.0078 µg/L | 3 | 5/13/2024 |
| PFHxA | 0.007 µg/L | 4 | 5/13/2024 |
| PFHxS | 0.004 µg/L | 2 | 12/15/2023 |
| PFBS | 0.0038 µg/L | 2 | 12/15/2023 |
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.
HARRIS COUNTY MUD 285
PWSID TX1012677 · TX · serves 13,158 people
PFAS and lithium
5 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 31 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFPeA | 0.0082 µg/L | 7 | 5/14/2025 |
| PFBA | 0.0078 µg/L | 8 | 6/21/2024 |
| PFHxA | 0.0072 µg/L | 7 | 5/14/2025 |
| PFBS | 0.0043 µg/L | 5 | 5/14/2025 |
| PFHxS | 0.004 µg/L | 4 | 12/15/2023 |
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.
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.