溫哥華驗屋師感言 Vancouver Home Inspector Journal : January - National Radon Action Month 氡氣行動月

The U.S. Environmental Protection Agency (EPA) has designated January National Radon Action Month. Please click here to learn more about the national effort to take action against radon.

Radon is a colourless, odourless, radioactive gas that occurs naturally in the environment. It comes from the natural breakdown of uranium in soils and rocks. The 2009 Maclean's magazine reports that 2,000 Canadians died from radon exposure in their home.

Health Canada planned to spend almost $1 million testing 18,000 randomly chosen homes to make a "radon potential map". The first year (2009) result was published in the Cross-Canada Survey of Radon Concentrations in Homes. The final report was released in March 2012. 54 samples were collected from Richmond and 100% were below 200 Bq/m3.

In 2007, we had protocols done by the BC Centre for Disease Control. A BC radon map was made (see map). Please don't panic, on average only 2.5% of households contain "unsafe" levels (more than 200 becquerels per cubic metre Bq/m3 = 5 pCi/L ). The Richmond houses are far away from the affected BC interior area. Keep this in mind! No smoking and keep proper ventilation in your home.
Please click here for the NEW 2021 interactive map that estimates local health risks due to indoor radon levels in BC.

In 2021 BC Radon Data Repository (BCRDR) shows the average of 54 Richmond samples have 11 Bq/m3.

氡氣是無色無臭的放射性氣體，由泥土及岩石中微量的鈾自然分解出來。室內的氡氣來自地基裂縫、建築用石材及食水。是主要環境致癌物質之一，也是吸菸以外引發肺癌的第二大殺手。每年有2000加人致死原因與家中含放射性元素有關。請勿吸菸！並保持室內空氣清新即可確保健康。

卑斯省於2007年完成試驗並製成分佈圖(見附圖)。從圖中所見，列治文市並不在 200 becquerels per cubic metre (Bq/m3 貝克)= 5 pCi/L 高危範圍內。

2021年卑詩綜合數據庫顯示列治文收到的54個樣本，平均值只有 11 Bq/m3，全部合乎低於 200 Bq/m3 的標準。請單擊此處 http://www.bccdc.ca/about/news-stories/stories/2021/new-interactive-radon-map 查看 2021 年卑斯省氡氣地圖。

聯邦衛生局動用一百萬元為18,000家庭測試氡氣含量，並繪畫全國氡氣分佈圖。2年計劃的首年共檢驗9,000間房屋，結果顯示紐賓士域、緬尼吐巴、沙斯卡川、育空有較多房屋的氡氣濃度超過每立方米空氣不得超過200貝克(Bq)的國家指引。貝克勒爾是放射性活度量度單位，指每秒有一個原子衰變。

紐賓士域有11.7%房屋氡氣濃度處於200至600貝克的第一級超高水準，5.3%房子甚至超過600貝克而達到第二級超高水準。
沙斯卡川的第一級及第二級超高水準氡氣濃度房屋，分別有14.2%及1.6%，緬尼吐巴為22.1%及1.4%，育空為10.6%及5.3%。
安大略僅有4.9%房屋氡氣濃度超過國家指引，魁北克則有9%，而努納伏的房屋都沒有超高水準的氡氣。