The ICR data were collected from July 1997 to December 1998. All the data have been verified, and the database is complete. The data that you will see are from individual samples. What EPA will evaluate is the degree to which the samples represent overall water quality. Montana, North Dakota, Vermont, Wyoming, the Virgin Islands, and Guam.
Reports are available for both disinfection byproducts and microbials .
Microbials National levels of Cryptosporidium . National levels of Giardia . National levels of virus. National levels of total coliform. National levels of fecal coliform.