Lead and Copper Rule Improvement (LCRI) – Service Line Inventory Requirements
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Understand your responsibilities under the EPA’s new rule and how to stay compliant by 2027
What is the Lead and Copper Rule Improvement (LCRI)?
On Oct. 8, 2024, the U.S. EPA issued the LCRI, requiring all community and non-transient non-community (NTNC) water systems to develop and submit a comprehensive baseline inventory of service lines and connectors by Nov. 1, 2027.
What You Need to Do
- Baseline Inventory
- Classify each service line and connector
- Include both public and private portions
- Submit by Nov. 1, 2027
- Public Notification
- Notify affected customers within 30 days
- Post inventory online (if serving >50,000 people)
- Include info in Consumer Confidence Reports
- Annual Updates
- Begin Jan. 30, 2029
- Include material counts and replacements
- Inventory Validation
- Validate a subset of non-lead lines by December 31, 2034
- Replacement Plan
- Submit Lead Service Line Replacement Plan (LSLRP) by Nov. 1, 2027
Page last updated: 24 Jul 2025, 01:41 PM