Cincinnati Tap Water

Water provider: Greater Cincinnati Water Works (Cincinnati, OH)

Our recommendation

Premium filter strongly recommended

Your water has contaminants that require stronger filtration (heavy metals, PFAS, or limits exceeded). Reverse osmosis is the recommended tier.

See recommended water filters →

What is in the water

Trihalomethanes (THMs)

Detected

Disinfection byproducts formed when chlorine reacts with organic matter. Long-term exposure linked to cancer risk.

Reported: ~20 ppb

Lead

Detected

A heavy metal that leaches from older plumbing. No safe exposure level for children. Linked to developmental and cognitive harm.

Reported: below action level

Atrazine

Detected

Agricultural herbicide. Endocrine disruptor. Banned in the EU, still used in the US.

Reported: seasonal

Source

Data from the GCWW Water Quality Report (2023). Last reviewed 2024-11-01.

Note: Contaminant levels vary by address (older plumbing can leach lead even when the source water does not), sampling location, and time of year. The figures above reflect utility-wide averages from the most recent public report. If you have specific health concerns, request a full report from your utility or test your own tap water.

← Browse all United States locations