What does your home's Bilko Index mean?
Your home's Bilko Index is a relative rating based on the products you entered in the product usage survey. The higher your Bilko Index, the higher the toxicity rating of your home. Therefore, it is desirable to have a low Bilko Index.
What is low? In order to get a feel for the meaning of the Bilko Index value, we calculated the Bilko Index for a smoker who smokes a pack of cigarettes a day, and for a nonsmoker in a home where a pack of cigarettes a day is smoked. (We did this using nicotine as a marker and assuming 0.6 mg nicotine per cigarette for the smoker, 0.4 mg nicotine per cigarette released to the home, and a reference concentration for nicotine of 0.1 micrograms per cubic meter.)
The Bilko Index for a pack-a-day smoker is 6000. For a nonsmoker living in a house where a pack of cigarettes is smoked every day, the Bilko Index is 4000.
Changes in your home's Bilko Index must be substantial in order to be meaningful. For example, lowering your home's Bilko Index by one-half does not represent a meaningful change.
The toxicity rating you are comfortable with depends on your personal values. Most people who have reported their home's Bilko Index to us have a Bilko Index of less than fifty. If you would like to report your home's Bilko Index, e-mail it to Kirsten Rosselot. Your results will remain anonymous.