Water report · not indexed
What is in the water at 27520
3 public water systems serve this ZIP code in the federal records. Everything below comes from EPA monitoring data, and everything missing is named.
CLAYTON, TOWN OF
PWSID NC0351020 · NC · serves 29,689 people
PFAS and lithium
5 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 10 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFOA | 0.0082 µg/L | 2 | 6/24/2024 |
| PFOS | 0.0081 µg/L | 2 | 6/24/2024 |
| PFPeA | 0.0064 µg/L | 2 | 6/24/2024 |
| PFHxA | 0.0059 µg/L | 2 | 6/24/2024 |
| PFBS | 0.004 µg/L | 2 | 6/24/2024 |
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.
JOHNSTON CO-WEST
PWSID NC0351070 · NC · serves 92,365 people
PFAS and lithium
8 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 66 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFBA | 0.016 µg/L | 5 | 4/30/2025 |
| PFOS | 0.014 µg/L | 12 | 9/3/2025 |
| PFHxA | 0.0092 µg/L | 12 | 9/3/2025 |
| PFPeA | 0.0092 µg/L | 12 | 9/3/2025 |
| PFOA | 0.0076 µg/L | 9 | 9/3/2025 |
| PFHxS | 0.0053 µg/L | 7 | 9/3/2025 |
| PFHpA | 0.005 µg/L | 4 | 4/30/2025 |
| PFBS | 0.0045 µg/L | 5 | 3/18/2025 |
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 30 mg/L as CaCO₃, measured at 3 stations serving this system across 29 results, 2016-05-09 to 2025-10-09. Measured in the water source and distribution area, not at a tap, and not in your home.
RALEIGH, CITY OF
PWSID NC0392010 · NC · serves 640,000 people
PFAS and lithium
5 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 13 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFBA | 0.009 µg/L | 3 | 8/8/2023 |
| PFOS | 0.0056 µg/L | 2 | 8/8/2023 |
| PFPeA | 0.0043 µg/L | 2 | 8/8/2023 |
| PFHxA | 0.0042 µg/L | 2 | 8/8/2023 |
| PFBS | 0.0033 µg/L | 4 | 8/8/2023 |
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
Median hardness 31 mg/L as CaCO₃, measured at 23 stations serving this system across 262 results, 2015-01-06 to 2025-10-21. 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.