Skip to main content

Lead and Copper Rule

Lead and copper samples are run through Inductively Coupled Plasma Mass Spectrometer at state lab
Environment, Great Lakes, and Energy

Lead and Copper Rule

The purpose of the Lead and Copper Rule (LCR) is to protect public health by minimizing lead and copper levels in drinking water. Lead and copper enter drinking water mainly from corrosion of lead and copper containing plumbing materials. The rule establishes action levels (AL) for lead and copper based on a 90th percentile level of tap water samples. An action level exceedance is not a violation but triggers other requirements to minimize exposure to lead and copper in drinking water, including water quality parameter monitoring, corrosion control treatment, source water monitoring/treatment, public education, and lead service line replacement. All community water supplies and nontransient noncommunity water supplies are subject to the LCR requirements.

Lead and Copper Tap Sampling

service line

Sample Site Selection

Site selection criteria were updated in 2018 to place more emphasis on sites with lead service lines. Review the updated Sample Site Collection Criteria to confirm the sites in your sampling pool still meet proper tiering criteria.

Lead and Copper Sampling Plan (Sampling Pool)

Water supplies must submit to EGLE a Sampling Plan that contains a pool of properly tiered lead and copper tap sampling sites.

Sampling Plan Instructions and Guidance

Videos

Sampling Plan Form

Tap Sampling Checklist

To avoid missing steps or deadlines, use this checklist as you prepare for and conduct lead and copper tap sampling and report results to EGLE.

Sampling Instructions

Samples MUST be collected according to very specific instructions.  Water supplies may use the following instructions to inform operators and/or homeowners on proper sample collection.

Sites WITHOUT Lead Service Lines

Sites WITH Lead Service Lines

Lead and Copper Report and Consumer Notice Certificate

Water Quality Parameter (WQP) Tap Sampling

person taking a drinking water sample at a school drinking fountain

Use these WQP report templates to report sampling results to EGLE. Choose the appropriate template based on whether or not your system has corrosion control treatment.

Training Materials

well construction educational conference presentation with attendees

Michigan Lead and Copper Rule Webinar Series for Drinking Water Operators

  1. Site Selection/Sampling Plans (Recorded 04/20/2021, 1 hr 29 min)
  2. Sampling (Recorded 05/04/2021, 1 hr 20 min)
  3. Reporting (Recorded 05/25/2021, 1 hr 13 min)
  4. Overview of Service Line Replacement and CDSMI-Minimum Services Line Material Verification Requirements (Recorded 9/9/2021, 1 hr 37 min)
  5. All Things Water Quality Parameters (WQPs) (Recorded 9/14/21, 1 hr 26 min)
  6. Lead and Copper Rule (LCR) Compliance Reporting (Recorded 9/21/2021, 1 hr 15 min)

Related Links

Mi Lead Safe

Visit Mi Lead Safe for information on exposure to lead in drinking water, the latest drinking water test results, and more.

Lead and Copper in Drinking Water

Visit EGLE's Lead and Copper in Drinking Water for other reference materials for water supplies and the public.

EPA Lead and Copper Rule

Visit the EPA for more information on the EPA Lead and Copper Rule, including the final rules and the Quick Reference Guide.

University of Michigan

View the University of Michigan's "What Changed with Michigan's 2018 Lead and Copper Rule".