Water report · not indexed
What is in the water at 76226
5 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 DENTON
PWSID TX0610002 · TX · serves 150,037 people
PFAS and lithium
5 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 19 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 10 µg/L | 1 | 10/23/2023 |
| PFBA | 0.0089 µg/L | 7 | 7/10/2023 |
| PFHxA | 0.0058 µg/L | 4 | 7/10/2023 |
| PFPeA | 0.0057 µg/L | 4 | 7/10/2023 |
| PFBS | 0.0047 µg/L | 3 | 7/10/2023 |
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.
ARGYLE WSC
PWSID TX0610019 · TX · serves 12,720 people
PFAS and lithium
5 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 47 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 41 µg/L | 12 | 8/14/2023 |
| PFBA | 0.077 µg/L | 9 | 8/14/2023 |
| PFHxA | 0.0077 µg/L | 10 | 8/14/2023 |
| PFPeA | 0.0057 µg/L | 10 | 8/14/2023 |
| PFBS | 0.0043 µg/L | 6 | 8/14/2023 |
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.
CROSS TIMBERS WSC
PWSID TX0610020 · TX · serves 7,880 people
PFAS and lithium
7 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 24 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 47 µg/L | 13 | 9/20/2023 |
| 6:2 FTS | 0.44 µg/L | 1 | 11/29/2023 |
| PFBA | 0.009 µg/L | 1 | 12/18/2023 |
| PFHxS | 0.0088 µg/L | 1 | 6/14/2023 |
| PFHxA | 0.0054 µg/L | 3 | 6/14/2023 |
| PFPeA | 0.0048 µg/L | 3 | 6/14/2023 |
| PFBS | 0.0036 µg/L | 2 | 12/18/2023 |
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.
DENTON COUNTY FWSD 7
PWSID TX0610228 · TX · serves 13,325 people
PFAS and lithium
4 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 13 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFBA | 0.0082 µg/L | 4 | 7/16/2024 |
| PFPeA | 0.0052 µg/L | 4 | 7/16/2024 |
| PFHxA | 0.0047 µg/L | 4 | 7/16/2024 |
| PFBS | 0.0032 µg/L | 1 | 4/23/2024 |
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.
TOWN OF NORTHLAKE
PWSID TX0610235 · TX · serves 10,430 people
PFAS and lithium
4 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 9 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| 6:2 FTS | 0.008 µg/L | 1 | 6/2/2025 |
| PFBA | 0.0073 µg/L | 5 | 6/2/2025 |
| PFPeA | 0.0033 µg/L | 2 | 6/2/2025 |
| PFHxA | 0.003 µg/L | 1 | 2/10/2026 |
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.