Colorado Revised Statutes Title 25. Health § 25-8-303. Monitoring

(1) The division shall take such samplings as may be necessary to enable it to determine the quality of every reasonably accessible segment of state waters, wherever practical. In sampling such waters the division shall give consideration to characteristics such as those listed in section 25-8-204(2), but if pollution is suspected the sampling shall not be limited or restricted by reason of the fact that no water quality standard has been promulgated for the suspected type of pollution.

(2) As to every segment of state waters so sampled, the division shall endeavor to determine the nature and amount of each pollutant, whether a new or different water quality standard is needed, the source of each pollutant, the place where each such pollutant enters the water, and the names and addresses of each person responsible for or in control of each entry.

(3) As to each separate pollution source identified, the division shall:

(4) The division shall inform the commission of any unusual problem which creates difficulties in abating pollution.