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  • Clean Water Act Methods - All questions relative to approved methods for the Clean Water Act (CWA) may be directed to the email address below.  This applies to microbiological and chemical method questions.  The address is OSTCWAMethods@epa.gov.
 
   

Louisiana Department of Environmental Quality 602 N. Fifth Street Baton Rouge, LA 70802 Call 1-866-896-LDEQ or e-mail our Customer Service Center with questions or comments Call or e-mail a hotline DEQ phone numbers and addresses by office Office Address/Phone listing Locate a DEQ employee