The proposed bill mandates that the Colorado Water Quality Control Commission develop written guidance by January 1, 2027, for establishing Total Maximum Daily Loads (TMDLs). TMDLs represent the maximum quantity of a specific pollutant that can enter state waters daily without breaching established water quality standards. This guidance aims to standardize the process for determining these pollutant limits.
Starting January 1, 2028, the Division of Administration within the Colorado Department of Public Health and Environment will be responsible for calculating TMDLs for state waters. These calculations must be based on credible data to ensure accuracy and reliability. The objective is to provide a clear framework for assessing and managing pollutants, thereby safeguarding Colorado's water quality.
Summary
The bill requires the water quality control commission, on or
before January 1, 2027, to issue written guidance specific to the development of the daily maximum amount of a pollutant from all sources that is allowed to enter state waters so that an applicable water quality standard is met (total maximum daily load). The bill also requires the division of administration in the department of public health and environment, on and after January 1, 2028, to determine a total maximum daily load for state waters using credible data.
