Permanent Water Quality (PWQ)

MS4 PWQ Program Overview

CDOT's Permanent Water Quality (PWQ) program is required under CDOT's Municipal Separate Storm Sewer System Permit (MS4).

Each CDOT region is responsible for evaluating new construction and redevelopment sites in the CDOT MS4 permit area to determine if stormwater controls are required. These controls are referred to as permanent water quality control measures (PWQ CM) or permanent best management practices (BMP).

For program assistance, consult region water pollution control managers/water quality specialists (see region contacts), or contact Program Manager Rachel Hansgen at [email protected] or 303-757-9975.

CDOT Applications for Mitigation Pool Funding
Limited Funding Available - Contact Pool Fund Manager
This section applies to CDOT-advertised projects only.  For local agency-advertised projects seeking mitigation pool funding , please visit the PWQ Local Agency Call for Projects site.


  • Rachel Hansgen
    Permanent Water Quality & Mitigation Pool Fund Manager
    [email protected] 

Application Materials

Limited Funding Available - Contact Pool Fund Manager

You must submit the following materials for all projects when applying for funding.

CDOT Mitigation Pool Fund Resources

Limited Funding Available - Contact Pool Fund Manager