Colorado Stormwater-Municipalities regulations & environmental compliance analysis

Colorado Stormwater-Municipalities: What you need to know

Governing Law and Regulations

Colorado Water Quality Control Act: Colorado Revised Statutes (CRS) 25-8-501 to 25-8-703

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General permits: 5 Code of Colorado Regulations (CCR) 1002-61.1 to 1002-61.17

Municipalities: 5 CCR 1002-61.3(2)

Phase I: 5 CCR 1002-61.3

Phase II: 5 CCR 1002-61.8

Waivers for municipal separate storm sewer systems (MS4): 5 CCR 1002-61.3(2)

Regulatory Agencies

Colorado Department of Public Health and Environment (CDPHE) Office of Environment Water Quality Control Division (WQCD)

U.S. Environmental Protection Agency (EPA) Region 8

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Colorado is authorized by the U.S. Environmental Protection Agency (EPA) to administer the federal National Pollutant Discharge Elimination System (NPDES) program, which includes the authority to issue permits covering discharges from municipal separate storm sewers (MS4s). The state's permit program is known as the Colorado Discharge Permit System (CDPS) and is the state equivalent of the NPDES permit program. The state generally follows the federal rules for MS4 stormwater permitting but uses state application forms and requires permit fees. See the national section STORMWATER—MUNICIPALITIES for more information regarding the federal permitting program.

Additionally, CDPS permits are required for certain groundwater discharges. Permittees should examine their CDPS permits carefully to determine whether their discharges to groundwater are authorized.

Administration and enforcement. The CDPHE's Water Quality Control Division WQCD is responsible for the administration and enforcement of the MS4 stormwater discharge permit regulations in Colorado.

State Requirements

MUNICIPALITIES

5 CCR 1002-61.3(2)


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