A June 12 story,”Water treatment facilities need more regulations,experts say” said that no bioterrorism law regulated water and sewer treatment plants and that the Environmental Protection Agency and the Department of Homeland security want the exemption closed because the plants use chemicals such as chlorine gas. The story should have said the plants are not regulated under DHS. The EPA does have authority to regulate water treatment plants to prevent bioterrorism. At the hearing Thursday,an EPA official said the agency believes DHS should have regulatory authority over water and sewer treatment plants. The story has been corrected on our Web site.