The City Of Temecula per Order R9-2004001:
- Develops and maintains an inventory of all commercial, industrial, and municipal facilities that could contribute pollutants to stormwater runoff;
- Designates minimum Best Management Practices (BMPs) to specified facilities. These BMPs will focus on preventing non-stormwater discharges, and eliminating, controlling, and/or treating pollutants in stormwater runoff;
- Conducts inspections of specified facilities to assess compliance with urban runoff ordinances and minimum BMP requirements. These inspections will be performed in addition to existing inspections conducted by the San Diego Regional Water Quality Control Board (SDRWQCB);
- Imposes sanctions on violators to ensure compliance with urban runoff ordinances. The City will also be required to report violations of Ordinances or minimum BMP requirements to the SDRWQCB.
National Pollutant Discharge Elimination System
The National Pollutant Discharge Elimination System (NPDES) program was developed by the EPA (US Environmental Protection Agency) to minimize or eliminate the possibility of polluting water bodies by storm water runoff, illegal dumping, and illicit discharges (discharges of anything other than unpolluted storm water).
In 1972, the Federal Water Pollution Control Act (also referred to as the Clean Water Act (CWA)) was amended to provide that the discharge of pollutants to waters of the United States from any point source is unlawful unless the discharge is in compliance with an NPDES permit.
Construction
2005 Erosion and Sediment Control Notes 
NPDES Construction Permit
General Construction Site and Supervision Best Management Practices
Industrial
Does Your Facility Need An Industrial Activities Storm Water General Permit
Storm Water Pollution Protection Plan
A Storm Water Pollution Prevention Plan (SWPPP) must be prepared before construction begins, ideally during the project planning and design phases.
Click here for more information on the SWPP including forms.
Riverside County Storm Water Permit (AKA NPDES MS4 Permit)
On July 14, 2004, the San Diego Regional Water Quality Control Board (Regional Board) adopted the Municipal Storm Water Permit for the portion of Riverside County within the San Diego Region, Order No. R9-2004-001 (NPDES Permit No. CAS0108766), Waste Discharge Requirements for Discharges of Urban Runoff from the Municipal Separate Storm Sewer Systems (MS4s) Draining the County of Riverside, the City of Murrieta, the City of Temecula and the Riverside County Flood Control and Water Conservation District within the San Diego Region. The transmittal letter posted below explains the changes that were made to the final Order based on Regional Board deliberations at the July 14, 2004 meeting.
The Riverside County Storm Water Permit includes requirements that impact the construction, commercial/industrial, municipal, and residential sectors.
Click here for more information including forms. 