ANNAPOLIS, Md. (AP) - Maryland will become the first state to ban an arsenic additive in chicken feed in January.
Gov. Martin O'Malley signed the measure into law on Tuesday.
Delegate Tom Hucker, D-Montgomery, says the additive is harmful to the environment as well as health.
The measure bans roxarsone, a chemical to help chickens grow and fight parasites. Pfizer Inc., the company that produces roxarsone, stopped selling the chemical in July after a U.S. Food and Drug Administration study found higher inorganic arsenic levels in chickens given the additive.
Hucker says the law new law is needed to prevent the chemical from being used again.
Maryland also is raising the high school dropout age from 16 to 17 in in 2015. It will rise to 18 in 2017.