Is Mason, OH Tap Water Safe to Drink?
Mason tap water meets federal Safe Drinking Water Act standards but 1 of 1 ZIP code show detections above EPA health guidelines, primarily for PFPeA. A certified filter is recommended for households that want an additional layer of protection.
Where Does Mason Get Its Water?
Water in Mason, OH is provided by 5 public water systems: BUTLER CO. WATER DISTRICT 2 PWS, CINCINNATI PUBLIC WATER SYSTEM, WARREN CO. FRANKLIN AREA PWS, WARREN CO. RICHARD RENNEKER PWS and WARREN CO. SOCIALVILLE PWS.
How Is Mason Tap Water Treated?
Treated water is disinfected using chloramines and free chlorine and on-site generated disinfectant. Treatment includes conventional treatment (coagulation, flocculation, and filtration), direct filtration, granular activated carbon filtration, membrane filtration, post-ozone biofiltration and slow sand filtration.
What's in Mason Tap Water?
The following contaminants were detected most frequently in Mason public water systems. 1 of 1 ZIP codes showed detections above EPA health guidelines.
| Contaminant | Peak detected | EPA guideline | ZIPs detected | Status |
|---|---|---|---|---|
| PFPeA | 0.0069 µg/L | 0.003 µg/L | 1 ZIP | Above guideline |
| lithium | 9 µg/L | — | 0 ZIPs | Within guideline |
| PFTrDA | 0.007 µg/L | — | 0 ZIPs | Within guideline |
| 11Cl-PF3OUdS | 0.005 µg/L | — | 0 ZIPs | Within guideline |
| HFPO-DA | 0.005 µg/L | — | 0 ZIPs | Within guideline |
Health Risk Profile for Mason
Based on EPA monitoring data, 1 of 1 ZIP codes in Mason have recorded detections above EPA health guidelines. Sensitive populations such as infants, pregnant individuals, and those with weakened immune systems may benefit from an additional layer of protection such as a certified point-of-use filter.
Best Broad-Spectrum Filters for This Water Profile
This city profile includes PFAS detections, chlorine disinfection, and other dissolved contaminants. Reverse osmosis (RO) systems certified under NSF/ANSI 58 provide broad reduction coverage; for PFAS specifically, confirm NSF/ANSI P473 or equivalent PFAS reduction certification.
8-stage tankless RO system certified to NSF/ANSI 58, reduces 1,000+ contaminants including PFAS, lead, arsenic, fluoride, and nitrates.
See recommendations matched to your exact address: choose your ZIP code below.
Frequently Asked Questions about Mason Tap Water
Is Mason tap water safe to drink?
Mason tap water meets Safe Drinking Water Act requirements but 1 of 1 ZIP codes show contaminant levels above EPA health-based guidelines. A certified point-of-use filter adds an extra layer of protection.
What contaminants are in Mason tap water?
The most commonly detected contaminants in Mason water systems include: PFPeA, lithium, PFTrDA. See the ZIP-level reports for exact measurements and EPA guideline comparisons.
Where does Mason get its drinking water?
Mason receives water from 5 public water systems, including BUTLER CO. WATER DISTRICT 2 PWS.
Do I need a water filter in Mason?
If your ZIP code is among those with detections above EPA health guidelines, choose a filter certified for the specific contaminants shown in your ZIP report. Reverse osmosis is generally the broadest option for PFAS, lithium, and many other dissolved contaminants.
How often is Mason tap water tested?
Public water systems in Mason are required by the EPA to test for regulated contaminants on schedules ranging from daily (for microbials and disinfectants) to annual or triennial (for many chemical contaminants). Results are published in annual Consumer Confidence Reports (CCRs). The data on this page reflects the most recent available EPA monitoring results, with the latest sample date of 2025-06-10.
Tap water reports by ZIP in Mason
- 45040 - Mason tap water report Higher concern
Water utilities serving Mason, OH
Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.
- BUTLER CO. WATER DISTRICT 2 PWSAction advised
- CINCINNATI PUBLIC WATER SYSTEMAction advised
- WARREN CO. SOCIALVILLE PWSAction advised
- WARREN CO. FRANKLIN AREA PWSLooks OK
- WARREN CO. RICHARD RENNEKER PWSLooks OK
Also covers / overlaps with
- Deerfield, OH · Township