September 14, 2004: Twenty-one new immunoassay methods were entered into the database.

April 15, 2004: Ten new methods developed by EPA's Office of Research and Development (ORD) and EPA's Office of Ground Water and Drinking Water (OGWDW) have been added to NEMI. Methods developed by ORD include procedures for measuring for chlorophylls in marine waters (445.0, 446.0, 447.0), total organic carbon in source water and drinking water (415.3), and nitrate and nitrite in marine waters (353.4). Methods developed for drinking water by OGWDW include procedures for measuring disinfection byproducts and trace bromate (317.0-Rev. 2.0, 326.0), chlorine dioxide and chlorite (327.0), n-methylcarbamoyloximes and n-methylcarbamates (531.2) and haloacetic acids and dalapon (552.3).

January 28, 2004: Twenty new methods have been added to NEMI from NOAA's Ocean Service National Status and Trends Program managed by the Center for Coastal Monitoring and Assessment and the National Centers for Coastal Ocean Science. The methods, which were published in Technical Memorandum # 130 "Sampling and Analytical Methods of the National Status and Trends Program Mussel Watch Project: 1993-1996 Update (1998)", include procedures for analyzing trace metals and a variety of chemical compounds (e.g., butyltins, PAHs, dioxins) in sediment and tissue.