Warren County Water Quality: 3 Cities Ranked by the Records
Warren County, Ohio: 3 city reports 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)Detected in 1 system of 3 tested4.0 ng/L federal MCL (2024) · US EPAHighest6.9 ng/L
- SPRINGBORO PWS6.9 ng/LSample date: 2024-07-12 to 2025-05-28
- FRANKLIN PUBLIC WATER SYSTEMNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-03-22 to 2023-09-19
- LEBANON CITYNot detected · below 4.0 ng/L lab reporting limitSample date: 2024-04-05 to 2025-02-19
Perfluorooctanesulfonic acid (PFOS)Detected in 2 systems of 3 tested4.0 ng/L federal MCL (2024) · US EPAHighest5.7 ng/L
- SPRINGBORO PWS5.7 ng/LSample date: 2024-07-12 to 2025-05-28
- FRANKLIN PUBLIC WATER SYSTEM4.1 ng/LSample date: 2023-03-22 to 2023-09-19
- LEBANON CITYNot detected · below 4.0 ng/L lab reporting limitSample date: 2024-04-05 to 2025-02-19
Perfluorohexanesulfonic acid (PFHxS)Detected in 1 system of 3 tested10 ng/L federal MCL (2024) · US EPAHighest3.8 ng/L
- SPRINGBORO PWS3.8 ng/LSample date: 2024-07-12 to 2025-05-28
- FRANKLIN PUBLIC WATER SYSTEMNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-03-22 to 2023-09-19
- LEBANON CITYNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-04-05 to 2025-02-19
Lead (90th percentile)Detected in 3 systems15 µg/L federal action level · US EPAHighest4.4 µg/L
- SPRINGBORO PWS4.4 µg/LMonitoring period: 2023–2025
- FRANKLIN PUBLIC WATER SYSTEM2.1 µg/LMonitoring period: 2022–2024
- LEBANON CITY1.2 µg/LMonitoring period: 2025–2025
Perfluorobutanesulfonic acid (PFBS)Detected in 1 system of 3 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest4.2 ng/L
- SPRINGBORO PWS4.2 ng/LSample date: 2024-07-12 to 2025-05-28
- FRANKLIN PUBLIC WATER SYSTEMNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-03-22 to 2023-09-19
- LEBANON CITYNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-04-05 to 2025-02-19
Perfluoropentanoic acid (PFPeA)Detected in 1 system of 3 testedNo federal or state limit; shown for transparencyHighest4.5 ng/L
- LEBANON CITY4.5 ng/LSample date: 2024-04-05 to 2025-02-19
- FRANKLIN PUBLIC WATER SYSTEMNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-03-22 to 2023-09-19
- SPRINGBORO PWSNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-07-12 to 2025-05-28
25 substances tested, none detected in any systemShow
Tested in these 3 systems: FRANKLIN PUBLIC WATER SYSTEM, LEBANON CITY, SPRINGBORO 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)
- Perfluorobutanoic acid (PFBA)
- Perfluorodecanoic acid (PFDA)
- Perfluorododecanoic acid (PFDoA)
- Perfluoroheptanesulfonic acid (PFHpS)
- Perfluoroheptanoic acid (PFHpA)
- Perfluorohexanoic acid (PFHxA)
- Perfluorononanoic acid (PFNA)
- 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 3 cities 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
- LebanonLEBANON CITY · OH830411220,700 served
- SpringboroSPRINGBORO PWS · OH830141219,263 served
- FranklinFRANKLIN PUBLIC WATER SYSTEM · OH830041211,690 served
Frequently asked
How does Warren County tap water compare across cities?
PurityMap ranks 3 cities in Warren 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 Lebanon's main water system: LEBANON CITY · PWSID OH8304112 · Purity Score 99 (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 Warren County cities had a PFAS sample above a 2024 EPA limit?
2 of 3 Warren County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Springboro (PFOA 6.9 ng/L), Franklin (PFOS 4.1 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 3.
Is there lead in Warren County tap water?
Utilities report lead as a 90th-percentile result from home taps. 3 of 3 Warren 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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