Maine may soon take a step toward limiting the use of a chemical widely believed to pose health risks to consumers.

The effort is focused on protecting infants and young children from bisphenol A, which they, and we, encounter in consumer products. This is a moment when public support could help make a good proposal even stronger.

BPA is an organic chemical that has fallen into disfavor because its chemical bonds are weak. Used in polycarbonate bottles and as a lining for metal cans, it can readily leach into food and water. Studies have shown high levels in human blood, breast milk and other bodily fluids.

Federal agencies have noted their concern and research has indicated links with breast and prostate cancer, learning disabilities, and hormonal disorders. The chemical industry argues that it “poses no known risk to human health,” but its presence in our bloodstreams and its documented effects on human hormones indicate a need for caution.

Many manufacturers are phasing it out in favor of safer alternatives that are readily available. Maine should do what it can to accelerate this trend.

The state’s Kid Safe Product Act, passed in 2008, provides for a comprehensive review of products potentially harmful to children. The law requires Maine to develop a list of “Chemicals of High Concern,” and BPA has been proposed to lead this list of hazards. Early next month, the Bureau of Environmental Protection will decide whether to adopt this recommendation.

The Department of Environmental Protection proposal could lead to a ban on the use of BPA in baby bottles and sippy cups by 2012. The DEP noted concern over baby food containers and cans of infant formula, but not to the same degree. And, the Alliance for a Clean and Healthy Maine has noted, the agency is not recommending a focus on food packaging for toddlers.

Now is the time for those worried about this hazard to raise their concerns. The board is accepting comments through Aug. 30. E-mails may be addressed to andrea.lani@maine.gov.

The BEP  should certainly designate BPA as a top priority, after which the Legislature will consider how strictly to regulate it. It’s an early but essential step toward protecting Maine’s children.

— Questions? Comments? Contact Managing Editor Nick Cowenhoven at nickc@journaltribune.com.