Perfluorooctanesulfonic acid
4.1ng/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); everything else measured is within its reference or not detected. Franklin Public Water System serves 11,690 residents.
Your water bill or annual water quality report names your actual supplier.
Also supplies: Carlisle
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.
4.1ng/L
Each block = 4.0 ng/L federal MCL (2024)
FRANKLIN PUBLIC WATER SYSTEM (EPA PWSID OH8300412) delivers groundwater to 11,690 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 4.1 ng/L, above the 4 ng/L limit
lead 2.1 µg/L, below the 15 µg/L action level
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
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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.
When your results arrive, read them here →
Each card names which Franklin findings its current certification covers, and which it doesn't.
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PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For Franklin, PFOS 4.1 ng/L was measured above the 4 ng/L federal limit in EPA's 2024 testing; the lead 90th-percentile result was 2.1 µg/L against the 15 µg/L action level. FRANKLIN PUBLIC WATER SYSTEM (PWSID OH8300412) has a Purity Score of 76/100 (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.
FRANKLIN PUBLIC WATER SYSTEM (PWS ID OH8300412) is the public water system on record for Franklin, Ohio, serving about 11,690 people. Confirm the utility on your water bill before acting on a specific finding.
Groundwater (primary source of record in EPA SDWIS).
Yes. In EPA's UCMR 5 testing (2023-03-22 to 2023-09-19), PFOS was measured at 4.1 ng/L against a 4 ng/L federal limit. Reverse osmosis and filters certified to NSF/ANSI 53 for PFOA/PFOS reduce them at the tap.
FRANKLIN PUBLIC WATER SYSTEM's most recent lead 90th-percentile result (2022–2024) was 2.1 µg/L, below the 15 µg/L action level. That figure comes from sampled homes; lead usually enters from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.
PurityMap's current record for Franklin holds 31 findings: 1 above a reference, 1 detected within the reference and 29 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 | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorooctanesulfonic acid (PFOS) | 4.1 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Lead (90th percentile) | 2.1 µg/L | 15 µg/L federal action level | Below the listed reference | 2022–2024 monitoring period | Lead & Copper Rule 90th-percentile: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Lithium | < 9 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Perfluorobutanesulfonic acid (PFBS) | < 3 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-22 to 2023-09-19 | UCMR5 Analytical Results: FRANKLIN PUBLIC WATER SYSTEM (OH8300412) |
Perfluorooctanesulfonic acid (PFOS)
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)
Perfluorobutanesulfonic acid (PFBS)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluoroheptanoic acid (PFHpA)
Perfluorohexanesulfonic acid (PFHxS)
Perfluorohexanoic acid (PFHxA)
Perfluoropentanesulfonic acid (PFPeS)
Perfluoropentanoic acid (PFPeA)
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: FRANKLIN PUBLIC WATER SYSTEM (OH8300412)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: FRANKLIN PUBLIC WATER SYSTEM (OH8300412)
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 Franklin Public Water System reported something related, it's shown below.
Lead at Franklin Public Water System: 2.1 µg/L (90th percentile, 2022–2024 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.
A ZIP code is a postal area, not a water service area. Your water bill names your supplier.