Clinton County Water Quality
Clinton County, Ohio: 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.
Perfluorooctanesulfonic acid (PFOS)WILMINGTON CITY PWS4.0 ng/L federal MCL (2024) · US EPA7.3 ng/L
- WILMINGTON CITY PWS7.3 ng/LSample date: 2023-04-03 to 2023-11-20
Perfluorohexanesulfonic acid (PFHxS)WILMINGTON CITY PWS10 ng/L federal MCL (2024) · US EPA7 ng/L
- WILMINGTON CITY PWS7 ng/LSample date: 2023-04-03 to 2023-11-20
Lead (90th percentile)WILMINGTON CITY PWS15 µg/L federal action level · US EPA0.8 µg/L
- WILMINGTON CITY PWS0.8 µg/LMonitoring period: 2023–2025
Perfluorohexanoic acid (PFHxA)WILMINGTON CITY PWS400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLE8.2 ng/L
- WILMINGTON CITY PWS8.2 ng/LSample date: 2023-04-03 to 2023-11-20
Perfluorobutanoic acid (PFBA)WILMINGTON CITY PWSNo federal or state limit; shown for transparency5.8 ng/L
- WILMINGTON CITY PWS5.8 ng/LSample date: 2023-04-03 to 2023-11-20
Perfluoroheptanoic acid (PFHpA)WILMINGTON CITY PWSNo federal or state limit; shown for transparency5 ng/L
- WILMINGTON CITY PWS5 ng/LSample date: 2023-04-03 to 2023-11-20
Perfluoropentanoic acid (PFPeA)WILMINGTON CITY PWSNo federal or state limit; shown for transparency9.8 ng/L
- WILMINGTON CITY PWS9.8 ng/LSample date: 2023-04-03 to 2023-11-20
24 substances tested, none detected in this systemShow
Tested in this system: WILMINGTON CITY PWS
- 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)
- Perfluorobutanesulfonic acid (PFBS)
- Perfluorodecanoic acid (PFDA)
- Perfluorododecanoic acid (PFDoA)
- Perfluoroheptanesulfonic acid (PFHpS)
- Perfluorononanoic acid (PFNA)
- Perfluorooctanoic acid (PFOA)
- Perfluoropentanesulfonic acid (PFPeS)
- 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 OhioLargest water systems
- WilmingtonWILMINGTON CITY PWS · OH140121112,401 served
Frequently asked
How does Clinton County tap water compare across cities?
PurityMap ranks 1 city in Clinton 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 Wilmington's main water system: WILMINGTON CITY PWS · PWSID OH1401211 · Purity Score 60 (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 Clinton County cities had a PFAS sample above a 2024 EPA limit?
1 of 1 Clinton County city report had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Wilmington (PFOS 7.3 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 Clinton County tap water?
Utilities report lead as a 90th-percentile result from home taps. 1 of 1 Clinton 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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