Dayton, OH tap water: what's in it in 2026
Serving 135K residents via Greater Dayton Water · Dayton, OH drinking water is supplied by Greater Dayton Water. EPA and utility monitoring commonly focus on issues such as PFAS from Wright-Patterson AFB, Industrial legacy, Great Miami Aquifer risk. Capital programs rotate through main replacements, corrosion-control adjustments, and treatment pilots (carbon, UV, membranes) while suburbs keep adding demand at the edges of the system. Pair this context with your address-specific EPA panel to see which upgrades line up with what was sampled most recently.
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Dayton has significant water quality concerns including pfas from wright-patterson afb. EPA legal limits are set based on treatment feasibility — not always on what independent health scientists consider safe. Certified filtration is strongly recommended for this water supply.
Wright-Patterson Air Force Base is one of the largest PFAS contamination sites in the US.
PFAS from Wright-Patterson has impacted the Great Miami Aquifer -- Dayton's primary water source.
Dayton is often cited as a national example of military PFAS contaminating a city's drinking water.
RO filtration is essential for Dayton residents -- the PFAS contamination is well documented and severe.
Source: EPA UCMR5 national monitoring dataset · Testing period 2023–2025 · MCL = Maximum Contaminant Level (legally enforceable limit) · Health limit = EPA health advisory threshold
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Certified Filter Recommendations
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COMMON QUESTIONS
Is Dayton tap water safe to drink in 2025?
Dayton water meets EPA legal standards, but meeting legal standards is not the same as being free of health concerns. EPA limits are set based on treatment feasibility, not always on what independent scientists consider safe. Dayton has pfas from wright-patterson afb which is a significant concern — certified filtration is strongly recommended.
Does Dayton water have PFAS?
EPA UCMR5 monitoring data for Dayton (water system OH7802311) is shown above. PFAS — sometimes called "forever chemicals" — are synthetic compounds that don't break down in the body. Only reverse osmosis systems or NSF 58-certified carbon block filters reliably remove PFAS from tap water. Standard pitcher filters do not remove PFAS.
Does Dayton water have lead?
Lead in tap water almost always comes from the pipes inside your home or building, not the treatment plant. Homes built before 1986 in Dayton are most at risk because they may have lead solder, brass fittings, or lead service lines. The EPA has no safe level for lead in children. An NSF/ANSI 53-certified filter or reverse osmosis system removes lead at the tap.
What water filter is best for Dayton?
For Dayton's water profile — pfas from wright-patterson afb, industrial legacy — a reverse osmosis system addresses the widest range of contaminants. Under-sink RO (Waterdrop G3P800, Aquasana SmartFlow) is the gold standard for homeowners. Renters can use a countertop RO like the Waterdrop K19-S Countertop RO — zero installation required. Clearly Filtered pitchers are the best non-RO option for PFAS and lead.
How do I get my Dayton water tested?
For the most accurate results for your specific tap, use a certified mail-in lab test rather than relying on city-wide data. SimpleLab Tap Score tests for 100+ contaminants including PFAS, lead, arsenic, and nitrates. Results come with a detailed health assessment and filter recommendations. City-wide EPA data like what you see above is a strong baseline, but your home's plumbing can add contaminants after the water leaves the treatment plant.
As of October 2024, all US water utilities must publish a public inventory of their lead service lines — the pipes connecting the water main to your home. Even if your utility water tests clean at the treatment plant, lead can leach from these pipes into your tap. Homes built before 1986 are most at risk.
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City-wide data is just the start. Enter your ZIP to see your exact water system's EPA report, PFAS levels, and violation history — then get the right filter for your home.
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Data reviewed by Joe Letorney, 30-year water treatment specialist →