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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.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.Links for 2018 BMP Design Manual
- Designer's Guide to Stormwater Requirements
- Temecula BMP Design Manual
- Temecula BMP Design Manual Appendices
- A.1_City of Temecula WQMP
- Appendix A.2 Temecula WQMP Exhibit A PDP requirements
- Appendix A.3 Operation and Maintenance (O M) Agreement (PDF)
- Appendix A.4 Temecula 2022 WQMP O&M Pack
- Appendix A.5 Temecula 2022 WQMP Verification Pack
- Appendix G.2 SMRHM User Guide
- Appendix I Pollutant Control Worksheets
- Appendix I.1 Automated worksheets for SD-A and SD-B
- 2018 Water Quality Equivalency Guidance for Region 9
- Watershed Management Area Analysis (WMAA)
- Sample WQMP
Links for WQMPs Approved Prior to July 4, 2018
- Temecula's BMP Hierarchy Guidelines (PDF): This provides a bullet-point summary outlining the proper BMP approach
- Low Impact Development BMP Design Handbook: This provides design worksheets for LID BMPs
- WQMP and Hydromodification Guidance Documents (2014): Scroll down to Compliance Documents and click on WQMP and Hydromodification Management Plan (HMP) tabs
- Checklist for Initial Applicability: Applies to projects submitted as of July 11, 2014
- WQMP Review Checklist
- WQMP Project-Specific Template (2014) (DOC)
- HMP Hydrology Model: Click on "Download" and not “add to cart,” approximately 100MB
- Stormwater/Groundwater/Environmental Mapping Tool: Browse Stormwater/Groundwater/Environmental GIS data and generate supporting documentation for water quality management plans
- Operation and Maintenance (O&M) Agreement (PDF)
- SMR Hydrologic Unit Map (PDF)
- 303d List of Impaired Waters in Region 9
- Bio-Retention Plant List (PDF): Excerpt from the LID Manual for Southern California
- BMP Maintenance Contractors: Free access to a nation-wide directory of BMP maintenance contractors
Links for WQMPs Approved Prior to July 11, 2014
- CASQA BMP Handbook for New and Re-Development Projects: Guidance for site design (Section 3), source controls (Section 4), and treatment BMPs (Section 5).
- Conceptual and Final Acceptance Checklists (PDF): No longer applies to WQMPs submitted as of July 11, 2014.
- Temecula-Specific Supplemental Slip Sheets (PDF): No longer applies to WQMPs submitted as of July 11, 2014.