One of the best things about celebrating our successes is sharing them with you, because they are your successes too. With your help, we work daily to address clean water issues around our country and in our communities. The work can be hard, and our campaigns may run long, but it is always worth it because our reward is always the same: cleaner, healthier and safer water for us all.

Just last month, we celebrated a huge win in Minnesota. Thanks to your calls, emails, letters and support, the children in Minnesota will soon be safer than before. On Friday, May 8, Minnesota's Governor Tim Pawlenty signed the BPA Free Baby Bill into law, making Minnesota the first state in the nation to ban the dangerous chemical from children's products. Now, we have a second landmark win to celebrate: Connecticut's new BPA ban. Even better, many other states are considering similar legislation.

This is BPA. Do you know how much you're exposed to each day?

BPA (Biphensol-A) is a synthetic sex hormone used in the manufacturing of some plastics, including baby bottles. The chemical has been linked with a range of health and behavioral problems-breast and prostrate cancer, obesity, ADHD, and more-and is a potent hormone disrupter even at low doses. Put simply, BPA is bad news.

Many hazardous chemicals such as BPA, creep into our lives because manufactures do not have to prove the chemicals' safety before using them. We think this is absurd. In November, 2008, we called for chemical policy reform. Now, with Minnesota's BPA ban, we could be one step closer to success. With your help, we will get there.

• The BPA Diaries: An Introduction