Mason County Water Quality

Name: Mason County Water Quality Data (2026)
Creator: PurityMap
License: https://creativecommons.org/licenses/by/4.0/

Mason County, Kentucky: one city report built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.

Find my system Open on the map Private wells in Mason County

Across the county's systems

Highest result for each contaminant

One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.

LithiumMAYSVILLE UTILITY COMMISSION10 µg/L EPA health reference level (screening, not a legal limit) · US EPA13 µg/L

MAYSVILLE UTILITY COMMISSION13 µg/LSample date: 2023-03-16 to 2023-12-04

Lead (90th percentile)MAYSVILLE UTILITY COMMISSION15 µg/L federal action level · US EPA3 µg/L

MAYSVILLE UTILITY COMMISSION3 µg/LMonitoring period: 2023–2025

Perfluoropentanoic acid (PFPeA)MAYSVILLE UTILITY COMMISSIONNo federal or state limit; shown for transparency8.3 ng/L

MAYSVILLE UTILITY COMMISSION8.3 ng/LSample date: 2023-06-06 to 2024-09-03

28 PFAS tested, none detected in this systemShow

Tested in this system: MAYSVILLE UTILITY COMMISSION

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)
Perfluorobutanoic acid (PFBA)
Perfluorodecanoic acid (PFDA)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluoroheptanoic acid (PFHpA)
Perfluorohexanesulfonic acid (PFHxS)
Perfluorohexanoic acid (PFHxA)
Perfluorononanoic acid (PFNA)
Perfluorooctanesulfonic acid (PFOS)
Perfluorooctanoic acid (PFOA)
Perfluoropentanesulfonic acid (PFPeS)
Perfluorotetradecanoic acid (PFTA)
Perfluorotridecanoic acid (PFTrDA)
Perfluoroundecanoic acid (PFUnA)

1 city

Cities ranked by the records

1
MaysvilleMAYSVILLE UTILITY COMMISSION
PFAS detected, within limitLead below action level
Open city report →

Showing 1 of 1 cities · scores are system-level, not tap tests

Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.

PFAS in Mason CountyPFAS detected in 1 of 1 city; none above a federal limit

4.0 ng/L federal MCL · PFOS, ng/LPFAS in Kentucky

Lead

0of 1 city above the 15 µg/L action level

Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.

Lead in Kentucky

Who supplies the county

Largest water systems

MaysvilleMAYSVILLE UTILITY COMMISSION · KY0810275
11,263 served

Questions

Frequently asked

How does Mason County tap water compare across cities?

PurityMap ranks 1 city in Mason County by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Maysville's main water system: MAYSVILLE UTILITY COMMISSION · PWSID KY0810275 · Purity Score 95 (Excellent) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.

How many Mason County cities have PFAS above the federal limit?

None of the 1 Mason County cities on record had a regulated PFAS above the 2024 federal limit in EPA's UCMR 5 testing. PFAS were detected below the limit in 1.

Is there lead in Mason County tap water?

Utilities report lead as a 90th-percentile result from home taps. 1 of 1 Mason County cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.

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