The Comprehensive Assessment and Listing Methodology (CALM) is how the Department evaluates existing and readily available surface water quality data and other information to determine whether or not surface water quality standards are being attained. Written listing methodologies are necessary to consistently determine whether or not surface waters are meeting their designated and existing uses. Protocols are updated as new and improved assessment tools and approaches become available.
Contact Meredith Zeigler at meredith.zeigler@env.nm.gov with CALM questions.