{"source":"reg-pfas","note":"Free 5-item preview. The full feed is $0.05/call at GET /v1/reg-pfas/changes.","question":"Which final or proposed federal rules affecting PFAS 'forever chemicals' were published since T, and which carry compliance obligations?","sample":[{"source":"reg-pfas","entityId":"fedreg:2026-13263","type":"proposed_rule","title":"Revisions To Establish the Sixth Unregulated Contaminant Monitoring Rule (UCMR 6) for Public Water Systems","summary":"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 compounds (including certain PFAS), three pesticide metabolites, 13 semivolatile organic compounds, and seven purgeable organic compounds. Subject to the availability of appropriations, the EPA will requ…","significance":6,"detectedAt":"2026-07-14T22:19:13.614Z","effectiveDate":null,"sourceUrl":"https://www.federalregister.gov/documents/2026/07/01/2026-13263/revisions-to-establish-the-sixth-unregulated-contaminant-monitoring-rule-ucmr-6-for-public-water","detail":{"documentNumber":"2026-13263","documentType":"Proposed Rule","agencies":"Environmental Protection Agency","publicationDate":"2026-07-01","vertical":"reg-pfas"}}]}