Perfluorooctanesulfonic acid
5.6ng/L
Each block = 4.0 ng/L federal MCL (2024)
Short answer: PFOS is above its federal limit (a 2024 limit that water systems have until at least 2029 to meet); 2 more are detected with no federal limit, and everything else measured is within its reference or not detected. Raleigh, City of serves 650,000 residents.
This report uses the largest, RALEIGH, CITY OF. Your water bill or annual water quality report names your actual supplier.
Source: EPA SDWIS 2026Q2.
The bar is drawn in blocks of the 4.0 ng/L federal MCL (2024), so the length shows how far above it the result sits.
5.6ng/L
Each block = 4.0 ng/L federal MCL (2024)
RALEIGH, CITY OF (EPA PWSID NC0392010) delivers surface water to 650,000 residents. This report reflects 29 individual PFAS result(s) from the source UCMR5 observations and the latest Lead & Copper Rule 90th-percentile result. Water hardness and disinfectant type are pending the utility's own annual report.
0health-based violations in the last 10 years
From EPA SDWIS. A clean violation history means no enforcement action was recorded; it does not cover contaminants without a limit.
No result is not a pass. Your utility's annual water quality report may list them, and a certified lab test covers your own tap.
Plumbing inside a home can add lead that the system record can't show. A tap test tells you what reaches your glass.
PFOS 5.6 ng/L, above the 4 ng/L limit (+4 more PFAS detected)
60 lead service lines; 367 galvanized lines to replace
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure.
Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
Each card names which Raleigh findings its current certification covers, and which it doesn't.
As an Amazon Associate, PurityMap earns from qualifying purchases. A product appears here only when a current certification record covers at least one identified concern; every concern stays listed. The retail offer is looked up afterwards and never changes which products appear or their order. Affiliate disclosure.









PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For Raleigh, PFOS 5.6 ng/L was measured above the 4 ng/L federal limit in EPA's 2024 testing. RALEIGH, CITY OF (PWSID NC0392010) has a Purity Score of 70/100 (confidence: moderate), assessed at the water-system level and computed only from contaminants that were measured. Water can change in your own pipes, so a certified test is the only way to know what comes out of your tap.
RALEIGH, CITY OF (PWS ID NC0392010) is the public water system on record for Raleigh, North Carolina, serving about 650,000 people. Confirm the utility on your water bill before acting on a specific finding.
Surface water (primary source of record in EPA SDWIS).
Yes. In EPA's UCMR 5 testing (2023-04-03 to 2024-03-19), PFOS was measured at 5.6 ng/L against a 4 ng/L federal limit. PFBS (3.3 ng/L, below the 2,000 ng/L EPA health advisory) and PFHxA (4.2 ng/L, below the 400,000 ng/L state limit) were also detected. PFBA (9 ng/L) and PFPeA (4.3 ng/L) were also detected; they have no federal or state limit. Reverse osmosis and filters certified to NSF/ANSI 53 for PFOA/PFOS reduce them at the tap.
Lead is not in Raleigh's current published record. Lead usually enters from a building's own pipes and fixtures, so a certified home test is the way to know yours.
PurityMap's current record for Raleigh holds 31 findings: 1 above a reference, 2 detected within the reference, 2 detected with no limit and 26 not detected. Each finding links to its dated public record; a parameter that was never monitored is shown as pending, not as a pass.
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| Contaminant | Result | Benchmark | Sampled | Source |
|---|---|---|---|---|
| Perfluorooctanesulfonic acid (PFOS) | 5.6 ng/L | 4.0 ng/L federal MCL (2024) | 2023-04-03 to 2024-03-19 | UCMR5 Analytical Results: RALEIGH, CITY OF (NC0392010) |
| Perfluorobutanesulfonic acid (PFBS) | 3.3 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | 2023-04-03 to 2024-03-19 | UCMR5 Analytical Results: RALEIGH, CITY OF (NC0392010) |
| Perfluorohexanoic acid (PFHxA) | 4.2 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | 2023-04-03 to 2024-03-19 | UCMR5 Analytical Results: RALEIGH, CITY OF (NC0392010) |
| Perfluorobutanoic acid (PFBA) | 9 ng/L | No federal or state limit; shown for transparency | 2023-04-03 to 2024-03-19 | UCMR5 Analytical Results: RALEIGH, CITY OF (NC0392010) |
| Perfluoropentanoic acid (PFPeA) | 4.3 ng/L | No federal or state limit; shown for transparency | 2023-04-03 to 2024-03-19 | UCMR5 Analytical Results: RALEIGH, CITY OF (NC0392010) |
Perfluorooctanesulfonic acid (PFOS)
Perfluorobutanesulfonic acid (PFBS)
Perfluorohexanoic acid (PFHxA)
Perfluoropentanoic acid (PFPeA)
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
Perfluoro-3-methoxypropanoic acid (PFMPA)
Perfluoro-4-methoxybutanoic acid (PFMBA)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluoroheptanoic acid (PFHpA)
Perfluorohexanesulfonic acid (PFHxS)
Perfluoropentanesulfonic acid (PFPeS)
Perfluorotetradecanoic acid (PFTA)
Perfluorotridecanoic acid (PFTrDA)
Perfluoroundecanoic acid (PFUnA)
Every value is the published result from the cited public record. A reporting limit is the lowest level the method could reliably quantify; a non-detect is not a guarantee of zero.
UCMR5 Analytical Results
UCMR5 Analytical Results: RALEIGH, CITY OF (NC0392010)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: RALEIGH, CITY OF (NC0392010)
US EPA SDWIS
Methodology: how we analyze water. Prepared with AI assistance and reviewed by the PurityMap Editorial Team before publication.
Start with the hot-or-cold tap check. Where Raleigh, City of reported something related, it's shown below.
Lead at Raleigh, City of: not detected (90th percentile, 2023–2025 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.