The Colorado Oil and Gas Conservation Commission (COGCC) has prepared this model sampling and analysis plan for parties who engage in sampling and analysis activities for Rule 609 - Statewide Groundwater Sampling and Monitoring and Rule 318A.e(4) - Groundwater Baseline Sampling and Monitoring in the Greater Wattenberg Area (GWA). This document will be modified as necessary based on new procedures, protocols, and other information that need to...

To aid in the preparation of the 303 Water Quality Management Plan the Water Quality Control Division undertook a survey of the Colorado River from Dotsero, Colorado to the Utah border a river segment requiring additional data. This report covers a sampling period extending from October 1973 through September 1974. The main emphasis during the sampling period as the gathering of chemical data although some biological studies were also conducted.

Total Maximum Daily Load (TMDL) is used to determine the maximum amount of a pollutant that a water body may receive and still maintain water quality standards. The mainstem of Silver Creek from a point immediately below the Town of Ricos water supply diversion to the confluence with the Dolores River is included in the 2006 303(d) list for exceeding the Aquatic Life use standards for zinc and cadmium.

The purpose of this document is to present an overview of the assessment methodology used by the Colorado Source Water Assessment and Protection (SWAP) Program. This methodology was used to evaluate all public drinking water systems in Colorado that have ground water sources. Topics addressed in this document include: 1) background information on the SWAP Program; 2) an overview of the water cycle, water sources and public water systems; 3) a discussion...