Code Library › Volume 1 › Section 9.1 — General
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

9.1.1.7.Radon

(1) In addition to all other requirements, a building in the following designated areas shall be designed and constructed so that the annual average concentration of radon 222 does not exceed 200 Bq/m 3 of air and the annual average concentration of the short lived daughters of radon 222 does not exceed 0.02 working levels inside the building for, (a) the City of Elliot Lake in the Territorial District of Algoma, (b) the Township of Faraday in the County of Hastings, and (c) the geographic Township of Hyman in the Territorial District of Sudbury.
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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.