Disinfection byproducts · 2025
HAA5 in Rochester, MN tap water
Rochester, MN's 2025 HAA5 measurement is below the federal limit.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Maximum Average or Highest Single Test Result | 4.1 ug/L | None set |
Range of Detected Test Results | 1.2–5.5 ug/L | None set |
Verbatim from Rochester, MN's 2025 Consumer Confidence Report — source document ↗
About HAA5
Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter.
Long-term exposure above the federal limit is associated with an increased cancer risk.
People also ask
+Is there HAA5 in Rochester, MN tap water?
Yes — Rochester, MN's 2025 Consumer Confidence Report lists HAA5 at 1.2–5.5 ug/L. Rochester, MN's 2025 HAA5 measurement is below the federal limit.
+What's the federal limit for HAA5 in drinking water?
The EPA has not set an enforceable federal limit for HAA5. Utilities still report any measured levels in their annual Consumer Confidence Report.
+What is HAA5?
Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. Long-term exposure above the federal limit is associated with an increased cancer risk.
+Where does this HAA5 measurement come from?
This page reproduces the HAA5 entry from the 2025 Consumer Confidence Report published by the Rochester, MN 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/mn/rochester/2025/source.