December 11, 2018 revisions to the MIOSHA Lead Standards

Michigan is the first state to lower acceptable blood lead levels for workers!  The administrative rules were updated lowering acceptable blood lead levels, replacing decades-old standards.  The diagnosis and treatment of lead exposure is based on the blood lead level (BLL) measured in micrograms of lead per deciliter of blood (μg/dL).   Former MIOSHA rules allowed workers to have BLLs of 50 - 60 µg/dL before they had to be removed from lead exposure.  Under the former rules, they could return to work when their BLL was below 40 µg/dL. The new MIOSHA rules require that employees be removed from lead exposure when their BLL reaches 30 µg/dL and may not return to work involving lead exposure until their BLL is below 15 µg/dL. The average BLL in the general population is 1.12 µg/dL.


The revised rules were filed with Michigan’s Office of the Great Seal on December 11, 2018, with an immediate effective date.  MIOSHA’s enforcement divisions are implementing a 60-day temporary stay on the enforcement of new blood lead levels in order to allow employers time to ensure compliance with the new requirements, giving them until Monday, February 11, 2019.


Part 310.  Lead in General Industry


Part 603.  Lead Exposure in Construction


For more information, please contact the MIOSHA Consultation Education and Training Division at 517-284-7720.