Jefferson County Water Quality
Jefferson County, Indiana: one city report built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.
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.
Perfluorooctanoic acid (PFOA)MADISON WATER DEPARTMENT4.0 ng/L federal MCL (2024) · US EPA4.6 ng/L
- MADISON WATER DEPARTMENT4.6 ng/LSample date: 2024-03-06 to 2024-10-02
Lead (90th percentile)MADISON WATER DEPARTMENT15 µg/L federal action level · US EPA1.8 µg/L
- MADISON WATER DEPARTMENT1.8 µg/LMonitoring period: 2021–2023
Perfluorobutanesulfonic acid (PFBS)MADISON WATER DEPARTMENT2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPA8.5 ng/L
- MADISON WATER DEPARTMENT8.5 ng/LSample date: 2024-03-06 to 2024-10-02
28 substances tested, none detected in this systemShow
Tested in this system: MADISON WATER DEPARTMENT
- 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)
- Lithium
- 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)
- 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)
- Perfluoropentanesulfonic acid (PFPeS)
- Perfluoropentanoic acid (PFPeA)
- Perfluorotetradecanoic acid (PFTA)
- Perfluorotridecanoic acid (PFTrDA)
- Perfluoroundecanoic acid (PFUnA)
Cities ranked by the records
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.
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 IndianaLargest water systems
- MadisonMADISON WATER DEPARTMENT · IN523900615,323 served
Frequently asked
How does Jefferson County tap water compare across cities?
PurityMap ranks 1 city in Jefferson 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 Madison's main water system: MADISON WATER DEPARTMENT · PWSID IN5239006 · Purity Score 73 (Fair) · 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 Jefferson County cities had a PFAS sample above a 2024 EPA limit?
1 of 1 Jefferson County city report had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Madison (PFOA 4.6 ng/L). That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation. PFAS were detected at any level in 1.
Is there lead in Jefferson County tap water?
Utilities report lead as a 90th-percentile result from home taps. 1 of 1 Jefferson 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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