On May 7, 2026, the Board proposed amendments to its “potentially infectious medical waste” (PIMW) rules for first-notice publication in the Illinois Register. BioSAFE Engineering initiated this rulemaking by filing a proposal to add an indicator microorganism, Bacillus Atrophaeus, to the Part 1422 PIMW rules for validation testing low-pressure treatment systems. Along with adding Bacillus Atrophaeus, the Board proposed clarifying amendments to Part 1422.
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