Water report · not indexed
What is in the water at 77407
14 public water systems serve this ZIP code in the federal records. Everything below comes from EPA monitoring data, and everything missing is named.
FORT BEND COUNTY MUD 25
PWSID TX0790130 · TX · serves 13,923 people
PFAS and lithium
1 compound detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 8 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 27 µg/L | 8 | 9/8/2023 |
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.
FORT BEND COUNTY MUD 30
PWSID TX0790146 · TX · serves 15,798 people
PFAS and lithium
4 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 17 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 23 µg/L | 3 | 8/16/2024 |
| PFBA | 0.0071 µg/L | 4 | 5/9/2024 |
| PFPeA | 0.0047 µg/L | 5 | 5/9/2024 |
| PFHxA | 0.0043 µg/L | 5 | 5/9/2024 |
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.
FORT BEND COUNTY MUD 50
PWSID TX0790277 · TX · serves 6,234 people
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 |
|---|---|---|---|
| lithium | 14 µg/L | 3 | 7/10/2023 |
| PFPeA | 0.0086 µg/L | 2 | 3/13/2023 |
| PFHxA | 0.0077 µg/L | 2 | 3/13/2023 |
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.
BIG OAKS MUD
PWSID TX0790332 · TX
PFAS and lithium
7 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 10 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 13 µg/L | 2 | 7/13/2023 |
| PFHxA | 0.0069 µg/L | 2 | 7/13/2023 |
| PFPeA | 0.0067 µg/L | 2 | 7/13/2023 |
| PFBA | 0.0056 µg/L | 1 | 3/13/2023 |
| PFOS | 0.0043 µg/L | 1 | 3/13/2023 |
| PFBS | 0.0033 µg/L | 1 | 3/13/2023 |
| PFHxS | 0.0032 µg/L | 1 | 3/13/2023 |
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.
FORT BEND COUNTY MUD 118
PWSID TX0790366 · TX · serves 5,403 people
PFAS and lithium
6 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 9 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 15 µg/L | 4 | 9/26/2023 |
| PFBA | 0.0078 µg/L | 1 | 12/14/2023 |
| PFPeA | 0.0067 µg/L | 1 | 12/14/2023 |
| PFHxA | 0.0063 µg/L | 1 | 12/14/2023 |
| PFBS | 0.0032 µg/L | 1 | 12/14/2023 |
| PFHxS | 0.0031 µg/L | 1 | 12/14/2023 |
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.
FORT BEND COUNTY MUD 122
PWSID TX0790416 · TX
PFAS and lithium
6 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 9 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 17 µg/L | 4 | 8/6/2024 |
| PFBA | 0.0095 µg/L | 1 | 1/22/2024 |
| PFPeA | 0.007 µg/L | 1 | 1/22/2024 |
| PFHxA | 0.0069 µg/L | 1 | 1/22/2024 |
| PFHxS | 0.0037 µg/L | 1 | 1/22/2024 |
| PFBS | 0.0036 µg/L | 1 | 1/22/2024 |
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
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.
FORT BEND COUNTY MUD 142
PWSID TX0790429 · TX
PFAS and lithium
8 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 16 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 12 µg/L | 3 | 8/11/2023 |
| PFHxA | 0.0091 µg/L | 3 | 5/3/2023 |
| PFPeA | 0.0088 µg/L | 3 | 5/3/2023 |
| 6:2 FTS | 0.0079 µg/L | 1 | 11/17/2023 |
| PFBA | 0.0076 µg/L | 1 | 2/21/2023 |
| PFOS | 0.0042 µg/L | 1 | 2/21/2023 |
| PFBS | 0.004 µg/L | 2 | 2/21/2023 |
| PFHxS | 0.0038 µg/L | 2 | 2/21/2023 |
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.
GRAND MISSION MUD 1
PWSID TX0790430 · TX · serves 6,639 people
PFAS and lithium
4 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 20 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 17 µg/L | 5 | 4/15/2025 |
| PFBA | 0.0063 µg/L | 5 | 7/16/2025 |
| PFPeA | 0.0051 µg/L | 5 | 4/15/2025 |
| PFHxA | 0.0042 µg/L | 5 | 4/15/2025 |
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.
FORT BEND COUNTY MUD 146
PWSID TX0790435 · TX
PFAS and lithium
6 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 20 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 9.7 µg/L | 2 | 3/31/2025 |
| 6:2 FTS | 0.0071 µg/L | 1 | 6/3/2025 |
| PFBA | 0.0065 µg/L | 6 | 6/3/2025 |
| PFPeA | 0.0049 µg/L | 5 | 3/31/2025 |
| PFHxA | 0.0041 µg/L | 5 | 3/31/2025 |
| PFBS | 0.0031 µg/L | 1 | 12/1/2025 |
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.
FORT BEND COUNTY MUD 123
PWSID TX0790446 · TX
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 | 13 µg/L | 2 | 8/5/2025 |
| PFBA | 0.0056 µg/L | 1 | 2/3/2025 |
| PFPeA | 0.0042 µg/L | 2 | 5/7/2025 |
| PFHxA | 0.0036 µg/L | 2 | 5/7/2025 |
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.
FORT BEND COUNTY MUD 165
PWSID TX0790470 · TX · serves 4,326 people
PFAS and lithium
6 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 15 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 13 µg/L | 3 | 7/10/2023 |
| PFBA | 0.022 µg/L | 2 | 7/10/2023 |
| PFPeA | 0.006 µg/L | 4 | 7/10/2023 |
| PFHxA | 0.0058 µg/L | 4 | 7/10/2023 |
| PFOS | 0.0042 µg/L | 1 | 6/26/2023 |
| PFHxS | 0.003 µg/L | 1 | 6/26/2023 |
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.
FORT BEND COUNTY MUD 143 WATER VIEW ESTA
PWSID TX0790472 · TX · serves 5,196 people
PFAS and lithium
3 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 5 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 17 µg/L | 3 | 9/16/2025 |
| PFBA | 0.005 µg/L | 1 | 9/16/2025 |
| PFPeA | 0.0031 µg/L | 1 | 3/11/2025 |
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.
FORT BEND COUNTY MUD 134B
PWSID TX0790532 · TX · serves 3,375 people
PFAS and lithium
3 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 3 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFBA | 0.0055 µg/L | 1 | 4/23/2025 |
| PFPeA | 0.0045 µg/L | 1 | 4/23/2025 |
| PFHxA | 0.0042 µg/L | 1 | 4/23/2025 |
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.
FORT BEND COUNTY MUD 134C
PWSID TX0790533 · TX · serves 7,266 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 | 12 µg/L | 2 | 9/18/2023 |
| PFBA | 0.0055 µg/L | 1 | 9/18/2023 |
| PFPeA | 0.0046 µg/L | 2 | 9/18/2023 |
| PFHxA | 0.0045 µg/L | 2 | 9/18/2023 |
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
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.