Perfluorooctanoic acid
7.2ng/L
Each block = 4.0 ng/L federal MCL (2024)
Short answer: PFOA is above its federal limit (a 2024 limit that water systems have until at least 2029 to meet); 1 more is detected with no federal limit, and everything else measured is within its reference or not detected. Mt Washington Water Company serves 23,760 residents.
Your water bill or annual water quality report names your actual supplier.
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.
7.2ng/L
Each block = 4.0 ng/L federal MCL (2024)
MT WASHINGTON WATER COMPANY (EPA PWSID KY0150300) delivers surface water to 23,760 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.
A tap test can confirm levels at your home before you choose treatment.
PFOA 7.2 ng/L, above the 4 ng/L limit (+1 more PFAS detected)
Each card names which Mount Washington 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 Mount Washington, PFOA 7.2 ng/L was measured above the 4 ng/L federal limit in EPA's 2024 testing. MT WASHINGTON WATER COMPANY (PWSID KY0150300) has a Purity Score of 61/100 (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.
MT WASHINGTON WATER COMPANY (PWS ID KY0150300) is the public water system on record for Mount Washington, Kentucky, serving about 23,760 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 (2025-06-05 to 2026-02-10), PFOA was measured at 7.2 ng/L against a 4 ng/L federal limit. PFPeA (4.1 ng/L) was also detected; it has 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 Mount Washington'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 Mount Washington holds 31 findings: 1 above a reference, 1 detected with no limit 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.
Follow Mount Washington's water
One email when a new sampling round is published, a result moves above or below its reference, or the system's score changes.
Double opt-in: we email a confirmation link. Unsubscribe anytime. No spam.
| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorooctanoic acid (PFOA) | 7.2 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| Perfluoropentanoic acid (PFPeA) | 4.1 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| 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 | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| 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 | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| 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 | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| 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 | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| 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 | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| Lead (90th percentile) | Non-Detect (ND) | 15 µg/L federal action level | Not detected above the reporting limit | 2023–2025 monitoring period | Lead & Copper Rule 90th-percentile: MT WASHINGTON WATER COMPANY (KY0150300) |
| 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 | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| 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 | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-06-05 to 2026-02-10 | UCMR5 Analytical Results: MT WASHINGTON WATER COMPANY (KY0150300) |
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)
Perfluorobutanesulfonic acid (PFBS)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluoroheptanoic acid (PFHpA)
Perfluorohexanesulfonic acid (PFHxS)
Perfluorohexanoic acid (PFHxA)
Perfluorooctanesulfonic acid (PFOS)
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: MT WASHINGTON WATER COMPANY (KY0150300)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: MT WASHINGTON WATER COMPANY (KY0150300)
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 Mt Washington Water Company reported something related, it's shown below.
Lead at Mt Washington Water Company: not detected (90th percentile, 2023–2025 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.