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On April 26, 2016 the Chatfield Watershed Authority approved an amended Intergovernmental Agreement (IGA) and bylaws. The 5-member Board of Directors will be comprised of elected officials representing Jefferson and Douglas counties, Town of Castle Rock, one wastewater district representative and one at-large representative. The Board will continue to be tasked to implement Control Regulation #73 and meet quarterly to address policy and fiscal issues. The Technical Review Committee will be a standing committee that meets monthly to address technical and scientific matters, serving at the pleasure of the Board. Other standing committees may be formed to address specific issues at the Board’s request.

The Chatfield Watershed Authority promotes protection of water quality in the Chatfield Watershed for recreation, fisheries, drinking water supplies, and other beneficial uses. To protect these beneficial uses, the Colorado Department of Public Health and Environment, Water Quality Control Commission, adopted Regulation #73. This regulation includes limits on the amount of phosphorus that can get into the reservoir. The number one source of phosphorus to Chatfield Reservoir is from nonpoint sources (NPS). Nonpoint sources of nutrients, such as phosphorus, come from many diffuse sources. NPS pollution is caused by rainfall or snowmelt moving over and through the ground. As the runoff moves, it picks up and carries away natural and human-made pollutants, finally depositing them into lakes, rivers, wetlands, coastal waters, and even our underground sources of drinking water.