Storm Drainage (MS4)

The federal Clean Water Act, Safe Drinking Water Act, Endangered Species Act, and the State of Colorado require the town to manage storm water runoff to protect the water quality in rivers and streams, protect watershed health, and protect groundwater as a drinking water source.

The town's storm water permit requires LaSalle to reduce storm water pollution and manage other programs that respond to water quality requirements.


LaSalle finances storm water management services by collecting public utility fees on developed property, and by collecting system development charges on new development.

Community Outreach

The town works with citizens, businesses, and property owners to increase public awareness of storm water issues and promote private storm water management efforts. Colorado Storm Water Council

General Permit

The Town of LaSalle is responsible for developing, administering, and enforcing the General Permit that was required in March 2003 by the Environmental Protection Agency (EPA) and the Colorado Department of Public Health and Environment (CDPHE). Under the General Permit for Discharge of Storm water, the town is responsible for enforcing the following 6 minimal control measures:

  • Public education and outreach
  • Public participation / involvement
  • Illicit discharge detection and elimination
  • Construction site runoff control
  • Post-construction runoff control
  • Pollution prevention / good housekeeping