Water report · not indexed
What is in the water at 19335
7 public water systems serve this ZIP code in the federal records. Everything below comes from EPA monitoring data, and everything missing is named.
DOWNINGTOWN WATER AUTHORITY
PWSID PA1150026 · PA · serves 9,900 people
PFAS and lithium
4 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 6 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFOA | 0.0042 µg/L | 1 | 7/8/2024 |
| PFBS | 0.0038 µg/L | 3 | 7/8/2024 |
| PFPeA | 0.0034 µg/L | 1 | 7/8/2024 |
| PFHxA | 0.0031 µg/L | 1 | 7/8/2024 |
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.
AQUA PA UWCHLAN
PWSID PA1150035 · PA · serves 35,518 people
PFAS and lithium
6 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 45 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFOA | 0.0093 µg/L | 9 | 8/13/2024 |
| PFPeA | 0.0077 µg/L | 9 | 8/13/2024 |
| PFOS | 0.0071 µg/L | 6 | 8/13/2024 |
| PFHxA | 0.0067 µg/L | 9 | 8/13/2024 |
| PFBA | 0.0057 µg/L | 1 | 7/29/2024 |
| PFBS | 0.0051 µg/L | 11 | 8/13/2024 |
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.
AQUA PA SPRING RUN
PWSID PA1150089 · PA · serves 8,151 people
PFAS and lithium
9 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 36 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFPeA | 0.008 µg/L | 8 | 7/9/2024 |
| PFHxA | 0.007 µg/L | 8 | 7/9/2024 |
| PFOA | 0.0068 µg/L | 6 | 7/9/2024 |
| PFBA | 0.0063 µg/L | 1 | 7/15/2024 |
| PFBS | 0.0056 µg/L | 6 | 7/9/2024 |
| PFNA | 0.0052 µg/L | 2 | 7/10/2024 |
| PFOS | 0.0044 µg/L | 1 | 7/10/2024 |
| PFHpA | 0.0042 µg/L | 2 | 7/15/2024 |
| PFHxS | 0.0036 µg/L | 2 | 7/15/2024 |
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.
AQUA PA WEST CHESTER
PWSID PA1150098 · PA · serves 48,600 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 |
|---|---|---|---|
| PFPeA | 0.0074 µg/L | 6 | 7/15/2024 |
| PFHxA | 0.0072 µg/L | 6 | 7/15/2024 |
| PFOA | 0.0059 µg/L | 3 | 7/15/2024 |
| PFBA | 0.0057 µg/L | 2 | 7/11/2024 |
| PFBS | 0.0036 µg/L | 2 | 7/11/2024 |
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 281 mg/L as CaCO₃, measured at 2 stations serving this system across 8 results, 2015-02-05 to 2015-10-21. Measured in the water source and distribution area, not at a tap, and not in your home.
PA AMERICAN COATESVILLE
PWSID PA1150106 · PA · serves 36,960 people
PFAS and lithium
2 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 2 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFBA | 0.0055 µg/L | 1 | 8/12/2024 |
| PFPeA | 0.0032 µg/L | 1 | 8/12/2024 |
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 89 mg/L as CaCO₃, measured at 5 stations serving this system across 21 results, 2016-03-22 to 2026-03-23. Measured in the water source and distribution area, not at a tap, and not in your home.
AQUA PA FRIENDSHIP
PWSID PA1150137 · PA · serves 8,800 people
PFAS and lithium
8 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 55 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFOS | 0.0095 µg/L | 9 | 7/9/2024 |
| PFBS | 0.0085 µg/L | 12 | 7/9/2024 |
| PFOA | 0.0077 µg/L | 10 | 7/9/2024 |
| PFPeA | 0.0072 µg/L | 11 | 7/9/2024 |
| PFHxA | 0.0071 µg/L | 10 | 7/9/2024 |
| PFBA | 0.0056 µg/L | 1 | 10/16/2024 |
| PFHxS | 0.003 µg/L | 1 | 7/9/2024 |
| PFHpA | 0.003 µg/L | 1 | 7/9/2024 |
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.
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.