If a national reference level for dwellings exists, the specific numerical value in Becquerel per cubic metre (Bq/m3). Dwellings includes all detached and attached structures used for non-occupational human residency. Response options include a numerical value.
Maximum reference levels of 300 Bq/m3 for homes and 1000 Bq/m3 for workplaces are provided in the IAEA General Safety Requirements Part 3 (GSR Part 3) (link at the bottom of this page)
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