Revisions To Establish the Sixth Unregulated Contaminant Monitoring Rule (UCMR 6) for Public Water Systems
The comment period closed Jul 31, 2026.
The U.S. Environmental Protection Agency (EPA or agency) is proposing the sixth Unregulated Contaminant Monitoring Rule (UCMR 6). Under the Safe Drinking Water Act (SDWA), the UCMR program gathers data about unregulated contaminant occurrence in drinking water. The proposed UCMR 6 would require public water systems (PWSs) to collect national occurrence data for seven ultrashort organofluorine comp
Summary from the Federal Register.
Read the rule
Full history
- Jul 1, 2026
Rule published
Revisions To Establish the Sixth Unregulated Contaminant Monitoring Rule (UCMR 6) for Public Water Systems
Environmental Protection Agency
About this record
- Source
From the Federal Register. This record was last updated Sep 24, 2026. About our data
- What it is
A rule from Environmental Protection Agency. Agora lists the comment window as the Federal Register gives it.
- Dates
Dates are in Eastern time.
This record shows the rule as proposed. A final rule, if any, is a separate Federal Register document.
- This page
Agora assembled this page from the Federal Register. The title and summary are the agency's, as the Federal Register prints them.