Rulemaking

Revisions to Establish the Sixth Unregulated Contaminant Monitoring Rule (UCMR 6) for Public Water Systems

🏛 Environmental Protection Agency (EPA)EPA-HQ-OW-2023-0469

Chemical & Toxic Substances Food Safety & Nutrition Tribal Sovereignty & Governance Water Quality & Infrastructure

Documents

Total comments

45 awaiting analysis

Comment status

Open

Last activity

Jul 27, 2026

In this docket

Documents

Rules, notices, and supporting material — the primary rule pinned first.

All 52 Supporting & Related Material 50 Proposed Rule 1

📄 Primary document

Proposed RuleJul 1, 2026

Revisions to Establish the Sixth Unregulated Contaminant Monitoring Rule (UCMR 6) for Public Water Systems

Open · 29 days left💬 43 comments · 43 awaiting analysis

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Supporting & Related Material· Jul 1, 2026
Pre-Proposal Webinar Summary and Slides→
Supporting & Related Material· Jul 1, 2026
Methods Request Federal Register Notice Comment Summary→
Supporting & Related Material· Jul 1, 2026
State Consultation Summary and Slides→
Supporting & Related Material· Jul 1, 2026
Tribal Consultation Summary and Slides→
Supporting & Related Material· Jul 1, 2026
Food and Water Watch Microplastics Petition→
Supporting & Related Material· Jul 1, 2026
Food and Water Watch Microplastics Petition EPA Response Letter→
Supporting & Related Material· Jul 1, 2026
Summary of Alaska Native Claims Settlement Act (ANCSA) Corporations Consultation and Slides→
Supporting & Related Material· Jul 1, 2026
Selection of Nationally Representative Public Water Systems for the Unregulated Contaminant Monitoring Rule: 2021 Update→
Supporting & Related Material· Jul 1, 2026
Statistical Design and Sample Selection for the Unregulated Contaminant Monitoring Regulation (1999)→
Supporting & Related Material· Jul 1, 2026
Instructions for Preparing a Ground Water Representative Monitoring Plan for the Unregulated Contaminant Monitoring Rule→
Supporting & Related Material· Jul 1, 2026
2019 Analysis of State Drinking Water Programs' Resources and Needs: Addressing Emerging Issues and State Specificity in Program Implementation→
Supporting & Related Material· Jul 1, 2026
National Primary Drinking Water Regulations: Consumer Confidence Reports Proposal→
Supporting & Related Material· Jul 1, 2026
National Primary Drinking Water Regulations: Consumer Confidence Reports Final Rule→
Supporting & Related Material· Jul 1, 2026
Organophosphate Pesticide Degradation Under Drinking Water Treatment Conditions→
Supporting & Related Material· Jul 1, 2026
Unregulated Contaminant Monitoring Rule (UCMR ) for Public Water Systems Revisions→
Supporting & Related Material· Jul 1, 2026
Trichloropropane; CASRN 96-18-4. National Center for Environmental Assessment, Integrated Risk Information System, Chemical Assessment Summary→
Supporting & Related Material· Jul 1, 2026
Drinking Water Contaminant Candidate List 3-Final→
Supporting & Related Material· Jul 1, 2026
Technical Basis for the Lowest Concentration Minimum Reporting Level (LCMRL) Calculator→
Supporting & Related Material· Jul 1, 2026
America’s Children and the Environment, Third Edition→
Supporting & Related Material· Jul 1, 2026
Revisions to the Unregulated Contaminant Monitoring Regulation (UCMR 3) for Public Water Systems→
Supporting & Related Material· Jul 1, 2026
Drinking Water Contaminant Candidate List 4-Final→
Supporting & Related Material· Jul 1, 2026
Revisions to the Unregulated Contaminant Monitoring Regulation (UCMR 4) for Public Water Systems→
Supporting & Related Material· Jul 1, 2026
Request for Nominations of Drinking Water Contaminants for the Fifth Contaminant Candidate List→
Supporting & Related Material· Jul 1, 2026
EPA's Per- and Polyfluoroalkyl Substances (PFAS) Action Plan→
Supporting & Related Material· Jul 1, 2026
Chlorpyrifos: Third Revised Human Health Risk Assessment for Registration Review→
Supporting & Related Material· Jul 1, 2026
Announcement of Final Regulatory Determinations for Contaminants on the Fourth Drinking Water Contaminant Candidate List→
Supporting & Related Material· Jul 1, 2026
MGK-264: Revised Human Health Risk Assessment in Support of Registration Review→
Supporting & Related Material· Jul 1, 2026
Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) for Public Water Systems and Announcements of Public Meetings→
Supporting & Related Material· Jul 1, 2026
Drinking Water Contaminant Candidate List 6 –Nominations→
Supporting & Related Material· Jul 1, 2026
National Primary Drinking Water Regulations: Consumer Confidence Reports (2024 Revision)→
Supporting & Related Material· Jul 1, 2026
U.S. Environmental Protection Agency Implementation of Gold Standard Science→
Supporting & Related Material· Jul 1, 2026
Announcement of Preliminary Regulatory Determination for Contaminants on the Fifth Drinking Water Contaminant Candidate List→
Supporting & Related Material· Jul 1, 2026
Drinking Water Contaminant Candidate List 6--Draft→
Supporting & Related Material· Jul 1, 2026
United States Geological Survey Estimated Annual Agricultural Pesticide Use: Pesticide Use Maps-Chlorpyrifos→
Supporting & Related Material· Jul 1, 2026
Restoring Gold Standard Science→
Supporting & Related Material· Jul 1, 2026
Recommended Parameters to Enhance Sensitivity for the Analysis of Select Purgeable Organic Compounds using EPA Method 524.3 (EPA 815-B-09-009) in Selected Ion Monitoring (SIM) Mode→
Supporting & Related Material· Jul 1, 2026
Standard Practice for Collection of Water Samples with High, Medium, or Low Suspended Solids for Identification and Quantification of Microplastic Particles and Fibers→
Supporting & Related Material· Jul 1, 2026
Standard Practice for Preparation of Water Samples with High, Medium, or Low Suspended Solids for Identification and Quantification of Microplastic Particles and Fibers Using Raman Spectroscopy, IR Spectroscopy, or Pyrolysis GC/MS→
Supporting & Related Material· Jul 1, 2026
Method 563: Determination of Selected Ultrashort Organofluorine Compounds in Drinking Water by Liquid Chromatography/Tandem Mass Spectrometry→
Supporting & Related Material· Jul 1, 2026
Request of the Governors of New Jersey, Delaware, Illinois, Maryland, Michigan, Wisconsin, and Connecticut under 42 U.S.C. § 300j-4(a)(2)(B)(ii) that EPA Include Microplastics in the Forthcoming Unregulated Contaminant Monitoring Rule 6 List→
Supporting & Related Material· Jul 1, 2026
Documentation of OMB Review Under Executive Order 12866: Revisions to Establish the Sixth Unregulated Contaminant Monitoring Rule (UCMR 6) for Public Water Systems→
Supporting & Related Material· Jul 1, 2026
Information Compendium for Candidate Contaminants for the Proposed Sixth Unregulated Contaminant Monitoring Rule (UCMR 6)→
Supporting & Related Material· Jul 1, 2026
UCMR 6 Laboratory Approval Manual (Version 1.0)→
Supporting & Related Material· Jul 1, 2026
Proposed Revisions to CFR Parts 141.35 and 141.40→
Supporting & Related Material· Jul 1, 2026
Information Collection Request for the Proposed Unregulated Contaminant Monitoring Rule (UCMR 6)→
Supporting & Related Material· Jul 1, 2026
Information Collection Request for the Proposed Unregulated Contaminant Monitoring Rule (UCMR 6) Supporting Statement→
Supporting & Related Material· Jul 1, 2026
Draft Economic Analysis of the Sixth Unregulated Contaminant Monitoring Rule→
Supporting & Related Material· Jul 1, 2026
Documentation of OMB Review Under Executive Order 12866: Economic Analysis of the Proposed Sixth Unregulated Contaminant Monitoring Rule (UCMR 6)→
Supporting & Related Material· Jul 1, 2026
Document submitted to initiate E.O. 12866 review: Revisions to Establish the Sixth Unregulated Contaminant Monitoring Rule (UCMR 6) for Public Water Systems→