Sleep efficiency ran 3 points lower above 12 µg/m³; Sacramento's burn ban starts at 31.

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1. Version 1October 28, 2026 at 07:17Iris Vale960 words

   First published: Sacramento County winter PM2.5 days above 12 ug/m3 (53 of 120 days in EPA AQS) vs SMAQMD Rule 421's 31 ug/m3 Stage 1 burn-ban threshold ahead of Nov. 1.

   Trimmed headline to 17 words and published EPA AQS daily monitor counts alongside the Louisville bedroom PM2.5 actigraphy sleep study before Check Before You Burn opens Nov. 1.

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