Disinfection byproducts · 2024
TTHM in Dayton, OH tap water
Dayton, OH's 2024 TTHM measurement is below the federal limit.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Highest single sample System-wide | 28.3 ug/L | None set |
Range System-wide | 12.9–27.5 ug/L | None set |
Verbatim from Dayton, OH's 2024 Consumer Confidence Report — source document ↗
About TTHM
Total trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter.
Long-term exposure above the federal limit is linked to liver, kidney, and central-nervous-system effects and increased cancer risk.
How Dayton, OH compares
1 of the 3 OH systems measuring TTHM on The Water Map have it at or above the federal limit:
Nearby systems also reporting TTHM:
People also ask
+Is there TTHM in Dayton, OH tap water?
Yes — Dayton, OH's 2024 Consumer Confidence Report lists TTHM at 28.3 ug/L. Dayton, OH's 2024 TTHM measurement is below the federal limit.
+What's the federal limit for TTHM in drinking water?
The EPA has not set an enforceable federal limit for TTHM. Utilities still report any measured levels in their annual Consumer Confidence Report.
+What is TTHM?
Total trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. Long-term exposure above the federal limit is linked to liver, kidney, and central-nervous-system effects and increased cancer risk.
+Which other U.S. cities have TTHM over the federal limit?
1 of the 3 OH systems on The Water Map measuring TTHM report it at or above the federal limit. Examples include Columbus, OH.
+Where does this TTHM measurement come from?
This page reproduces the TTHM entry from the 2024 Consumer Confidence Report published by the Dayton, OH water utility — the annual drinking-water report every U.S. utility is required by federal law to publish. The original source document is archived at /water/oh/dayton/2024/source.