Water report · not indexed
What is in the water at 18966
4 public water systems serve this ZIP code in the federal records. Everything below comes from EPA monitoring data, and everything missing is named.
UPPER SOUTHAMPTON MUN AUTH
PWSID PA1090063 · PA · serves 16,000 people
PFAS and lithium
8 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 32 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFBA | 0.019 µg/L | 4 | 7/21/2023 |
| PFOS | 0.016 µg/L | 4 | 7/21/2023 |
| PFOA | 0.014 µg/L | 4 | 7/21/2023 |
| PFPeA | 0.0083 µg/L | 4 | 7/21/2023 |
| PFHxA | 0.0076 µg/L | 4 | 7/21/2023 |
| PFBS | 0.0075 µg/L | 4 | 7/21/2023 |
| PFHpA | 0.0051 µg/L | 4 | 7/21/2023 |
| PFHxS | 0.005 µg/L | 4 | 7/21/2023 |
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
1 open health-based violation(s) recorded in SDWIS and not yet returned to compliance.
- TT · contaminant code 0700 · began 2025-10-01
Hardness
Too few readings to state a hardness. 1 station(s), 1 result(s). Below two stations and five results this page will not state a number: a median of two readings from one creek is not your water.
BCWSA MAIN LOWER SOUTH
PWSID PA1090079 · PA · serves 52,621 people
PFAS and lithium
8 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 39 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFPeA | 0.019 µg/L | 7 | 8/7/2024 |
| PFHxA | 0.012 µg/L | 7 | 8/7/2024 |
| PFBA | 0.0075 µg/L | 4 | 8/7/2024 |
| PFOA | 0.0073 µg/L | 6 | 8/7/2024 |
| PFOS | 0.0069 µg/L | 4 | 8/7/2024 |
| PFBS | 0.0056 µg/L | 4 | 8/7/2024 |
| PFHxS | 0.0048 µg/L | 4 | 8/7/2024 |
| PFHpA | 0.0032 µg/L | 3 | 8/7/2024 |
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
Median hardness 138 mg/L as CaCO₃, measured at 2 stations serving this system across 174 results, 2015-01-22 to 2026-03-18. Measured in the water source and distribution area, not at a tap, and not in your home.
NORTHAMPTON BUCKS CO MUN AUTH
PWSID PA1090089 · PA · serves 36,750 people
PFAS and lithium
10 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 172 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 19 µg/L | 6 | 6/11/2025 |
| PFOS | 0.023 µg/L | 24 | 6/11/2025 |
| PFPeA | 0.021 µg/L | 25 | 6/11/2025 |
| PFOA | 0.02 µg/L | 27 | 6/11/2025 |
| PFHxA | 0.018 µg/L | 25 | 6/11/2025 |
| PFBS | 0.015 µg/L | 24 | 6/11/2025 |
| PFHpA | 0.0086 µg/L | 21 | 6/11/2025 |
| PFBA | 0.0081 µg/L | 11 | 6/11/2025 |
| PFHxS | 0.0055 µg/L | 7 | 6/11/2025 |
| PFNA | 0.0043 µg/L | 2 | 6/11/2025 |
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
Median hardness 218 mg/L as CaCO₃, measured at 2 stations serving this system across 17 results, 2018-04-25 to 2018-09-06. Measured in the water source and distribution area, not at a tap, and not in your home.
AQUA PA MAIN SYSTEM
PWSID PA1460073 · PA · serves 822,600 people
PFAS and lithium
10 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 227 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 16 µg/L | 2 | 8/12/2024 |
| PFPeA | 0.022 µg/L | 43 | 9/25/2024 |
| PFHxA | 0.017 µg/L | 42 | 9/25/2024 |
| PFOA | 0.013 µg/L | 35 | 9/10/2024 |
| PFNA | 0.012 µg/L | 7 | 8/20/2024 |
| PFBA | 0.01 µg/L | 20 | 8/7/2024 |
| PFBS | 0.0095 µg/L | 35 | 9/25/2024 |
| PFOS | 0.0092 µg/L | 16 | 9/10/2024 |
| PFHxS | 0.0077 µg/L | 11 | 9/10/2024 |
| PFHpA | 0.0069 µg/L | 16 | 8/20/2024 |
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
Median hardness 188 mg/L as CaCO₃, measured at 14 stations serving this system across 60 results, 2015-02-05 to 2023-10-25. Measured in the water source and distribution area, not at a tap, and not in your home.
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.