How Clean Is Your Home’s Air? LCS Laboratory Inc. has conducted extensive testing in hundreds of residential homes to measure fiber concentrations in indoor air. This article explores what qualifies as a “clean house” and identifies fiber concentration thresholds that may indicate the need for additional cleaning.
Why Fiber Size Matters
The safety industry prioritizes the smallest fibers because they penetrate deeper into the lungs, posing greater health risks. Our tests adhere to the NIOSH 7400 procedure for fiber count, which excludes longer fibers (typically over 100-300 microns) from analysis due to their size and inability to be observed under a microscope.
Common Types of Fibers Found in Residential Air
- Cellulose Fibers: Derived from wood, paper, and cotton, these are usually non-toxic but may carry mould or chemical allergens.
- Asbestos Fibers: The most hazardous fibers due to their minute size and ability to remain airborne indefinitely.
- Glass and Rock Wool Fibers: Common insulation materials that rarely appear in the air, as they settle quickly into dust.
- Biological Fibers: Includes hair, fur, feathers, and spider webs, typically not reported due to their size.
- Synthetic Polymer Fibers: Found in carpets and fabrics; these are uncommon in residential air because of their weight.
Fiber Concentration Thresholds in Residential Air
Based on 300 self-collected air samples from homes without active renovations, the following fiber concentration levels were identified:
- <0.002 ff/cc: Cleanest Air
- 50% of tested properties had undetectable fiber concentrations (<0.002 fibers per cubic centimetre), the lowest measurable level.
- 0.000 – 0.005 ff/cc: Acceptable Level
- 75% of homes fell within this range, indicating safe air quality. Only 25% exceeded 0.005 ff/cc.
- 0.005-0.009 ff/cc: Warning Level
- 90% of homes had fiber concentrations below 0.009 ff/cc. The remaining 10% indicated higher contamination levels.
- >0.009 ff/cc: Critical Limit
- 10% of homes exceeded this threshold, approaching the regulated clearance level of 0.010 ff/cc for asbestos fibers.
Take Action for Cleaner Air
If you suspect fiber contamination in your home, order an air sampling kit through the link below.
For large properties, custom-built kits are available, please email us to discuss your specific needs. Ensure your indoor air quality meets safe standards with LCS Laboratory’s reliable testing services.