For criteria to be enforceable they must be codified in regulations. States should carefully consider how to codify these criteria. A. Resident biota integrate multiple impacts over time and can detect impairment from known and unknown causes. Biocriteria can be used to verify improvement in water quality in response to regulatory efforts and detect continuing degradation of waters. They provide a framework for developing improved best management practices for nonpoint source impacts.
Numeric criteria can provide effective monitoring criteria for inclusion in permits.
The process of developing biological criteria, including refined use classes, narrative criteria, and numeric criteria, must include agency managers, staff biologists, and the public through public hearings and comment. The key to criteria development and revision is a clear statement of measurable objectives. A. Information is available in several EPA documents. Below is a list of some of the most useful EPA documents on biocriteria. Others have also published useful information on the development and implementation of biocriteria.