DAYTON PUBLIC WATER SYSTEM
High Risk1 PFAS compound(s) exceed EPA Maximum Contaminant Levels
This utility has until 2029 to install treatment under the EPA's April 2024 PFAS rule. In the meantime, a point-of-use filter certified NSF/ANSI 58 for PFOA/PFOS provides reliable interim protection.
5
PFAS Detected
1
Above EPA Limits
24
ZIPs Served
Groundwater
Water Source
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 10.00ppt | 250% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 9.80ppt | 98% of limit
| 10 ppt | Below limit |
PFPeA Perfluoropentanoic acid | 4.60ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 4.40ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 3.00ppt | No federal limit | — | Unregulated |
ZIP Codes Served by This Utility
45315 45322 45377 45402 45403 45404 45405 45406 45408 45409 45410 45414 45415 45416 45417 45419 45420 45424 45426 45427 45428 45431 45432 45439
Click any ZIP to see the full result page for that area.
About this data
Source
EPA UCMR 5 — January 2026 release
Sampling period
January 2023 – December 2025
Water system ID (PWSID)
OH5703512
Detection threshold (MRL)
~1.5–2 ppt — "Not detected" means below this floor