Lead & Copper Rule Revision (LCRR) Resources are listed below in order to help water systems and their water operations specialists in Minnesota better understand the LCRR and what comes next. Lead & Copper Rule Revision ResourcesEPA | Review of the National Primary Drinking Water Regulations Lead & Copper Rule Revisions EPA Lead and Copper Rule Lead Service Line Inventory Guidance MDH | Lead & Copper Rule Revisions MDH | Drinking Water Revolving Loan Fund General Information MDH | Service Line Material Types and DefinitionsMDH | Quick Reference Guide for Lead Service Line InventoriesMDH | Lead & Copper Rule Revision Inventory Guidance SlidesNRWA | Lead & Copper Rule Overview MRWA | Template / Guidelines for Systems with Customer Participation in Identifying ServicesMRWA LCRR Training Available on our Training Calendar