Water Quality Management Plan

Urban runoff contains pollutants that adversely affect water quality in our local creeks, harm our aquatic habitats, and degrade our water supplies. Urbanization not only increases the concentration of existing pollutants in everyday runoff but also introduces new pollutants into our surrounding ecosystems. In addition, increased stormwater flows caused by urban sprawl cause erosion, hydromodification, and other environmental damages downstream.
In order to mitigate the effects of urbanization on water quality, and in accordance with State and Regional water quality mandates, the City of Temecula conditions all new developments and modifications to existing developments that have the potential to contact stormwater, to implement project-wide Low Impact Development (LID) Best Management Practices (BMPs). By implementing BMPs, pollutants can be effectively removed from the project's post-construction runoff before reaching our local creeks.

BMP Design Manual 

To meet this requirement, the City of Temecula developed a BMP Design Manual to guide project applicants through this process. Project applicants must prepare a Water Quality Management Plan to illustrate how they have applied LID BMPs in their project.
Trees and Rocks in a Parking Lot for Stormwater Prevention

What is a WQMP?

  • A WQMP is a special plan that must be prepared during the project's entitlement phase and accepted by the City. Priority Development Projects (PDPs) must include "Exhibit A, PDP requirements" which must be prepared by a Registered Civil Engineer.
  • A WQMP identifies the source control and site design BMPs required to prevent pollutants from entering the project's post-construction runoff .
  • A WQMP identifies Construction Phase BMPs required to prevent pollutants from entering the project's construction runoff.
  • A WQMP identifies if a  project is a Priority Development Project and if "Exhibit A, PDP requirements"  must be prepared by a Registered Civil Engineer.
  • "Exhibit A, PDP requirements" identifies all project-related pollutants, impacts to the site's hydrologic condition, and potential impacts to our local creeks caused by the project's post-construction runoff.
  • "Exhibit A, PDP requirements" identifies the parties responsible for long-term operation and maintenance activities of all BMPs.
The WQMP contains step-by-step instructions and a project-specific template to design effective combinations of post-construction BMPs that meet local, state, and federal regulations. 

NPDES Hotline

Report illegal discharges at 951-694-6411 during business hours, and at 800-506-2555 after business hours.
Only Rain in the Drain Illustration

Links for WQMPs Approved Prior to July 4, 2018


Links for WQMPs Approved Prior to July 11, 2014