HB 25-1099

HB 25-1099, also known as the Water Quality Data Standards bill, requires Colorado’s water quality control commission to create guidelines by January 1, 2027, for determining how much pollution can safely enter state waters each day. Starting in 2028, the Department of Public Health and Environment must use these guidelines to set limits on daily pollutant levels based on reliable data. This bill aims to improve water quality standards across Colorado by ensuring that all sources of pollution are accounted for and regulated properly. Since it has been signed into law, the provisions will begin taking effect as specified dates approach.

Official 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.(Note: This summary applies to this bill as introduced.)