Since the 1940s, BPA has been used in plastics and in the lining of aluminum cans.  It is an endocrine-disrupting chemical that mimics estrogen and wreaks havoc on the hormonal system of both men & women. When BPA breaks down it leaches into food & water and is absorbed by the body.  BPA (Bisphenol-A) has been linked to cancer, obesity, diabetes, autism, reproductive disorders, immune & nervous systems, thyroid disruption and brain tumors. Over 90% of Americans “have measurable levels of BPA in their urine.”
Chemicals are deemed safe until proven otherwise, but companies aren’t required to submit data for existing products unless it is proven as harmful. However, it is difficult to prove something as harmful without data.  The safety of current BPA levels is based on research that was conducted over 20 years ago.  Don’t wait for the FDA or the EPA to rule it as harmful – take your health into your own hands.
BPA isn’t just in plastic water bottles
It is challenging to avoid BPA completely, especially since it is everywhere from food and beverage containers (plastic and aluminum), most household water systems (PVC pipes), toothpaste tubes, baby bottles and much more. The key is to minimize exposure to reduce its harmful effects.
Tips to get you started:
1. Use BPA free products when available.
2. Reduce, or discontinue use of, canned goods and beverages in aluminum cans.
3. Look for the recycle symbol with either a 1, 2, or 4 which indicates that the item is recyclable and does not contain BPA. 
4. Use microwave-safe glass or ceramic containers rather than plastic trays, or you can heat items on the stovetop in a saucepan or skillet.
 http://www.time.com/time/specials/packages/article/0,28804,1976909_1976908 _1976938-2,00.html