Know the Rules
Only Rain to the Drain
The storm drainage system is designed to convey rain water to our local creeks. Businesses and residents all need to be aware of what is allowed and not allowed into the storm drain system.
Help Us Keep It Clean!
Ordinances and state regulations establish methods for controlling pollutants entering the storm drainage system.
Local ordinances are a requirement of the Keep it Clean Partner’s Municipal Stormwater Discharge Permits issued by the State of Colorado.
The objectives of the ordinances are to:
- Control pollutants to the storm drainage system.
- Prohibit illegal connections and discharges to the storm drainage system.
- Establish legal authority to carry out inspections, surveillance, monitoring, and enforcement procedures necessary to ensure compliance with this ordinance.
- Promote public awareness of the hazards of improperly releasing trash, yard waste, lawn chemicals, pet waste, wastewater, grease, oil, petroleum products, cleaning products, paint products, hazardous waste, sediment, and other pollutants into the storm drainage system.
- No person shall discharge or cause to be discharged into the storm drainage system or water courses any materials other than stormwater.
- The construction, use, maintenance, or continued existence of illicit connections to the storm drainage system is prohibited.
- It shall be unlawful to cause materials to be deposited in such a manner or location as to constitute a threatened discharge into storm drains, gutters, or waters of the State. Materials that are no longer contained in a pipe, tank, or other container are considered to be threatened discharges unless they are actively being cleaned up.
- No person shall maliciously destroy or interfere with structural controls in place to protect water quality.
The following types of discharges could be allowed to the storm drainage system when properly managed:
- Water line flushing or other potable water sources
- Landscape irrigation or lawn watering
- Irrigation return flows
- Diverted stream flows
- Rising groundwater
- Uncontaminated groundwater infiltration to storm drains
(as defined by 40 CFR 35.2005 (20)
- Uncontaminated pumped groundwater
- Single family residential foundation or footing drains
- Single family residential crawl space pumps
- Air conditioning condensation
- Individual residential car washing
- Natural riparian habitat or wetland flows
- Swimming pools (if dechlorinated – less than 0.05 PPM chlorine)
Discharges approved by the authorized enforcement agency as being necessary to protect public health and safety, such as flows from emergency firefighting.
Dye testing, provided the person undertaking such testing provides verbal notification to the authorized enforcement agency 24 hours prior to the time of the test.
Any non-stormwater discharge permitted under an CDPS permit, provided that the discharger is in full compliance with all requirements of the permit.
- waters from construction sites (including groundwater, groundwater remediation, and construction dewatering)
- discharges of surface cosmetic power washing operations to land guidance
- heat transfer equipment (HTE)/commercial washing of outdoor structures
- discharges from potable water monitoring devices guidance
- fire safety maintenance activities draft guidance
- vault dewatering guidance
For more specifics about these requirements, contact the Keep it Clean Partner responsible for the jurisdiction in which you are interested.