Storm Drain

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Commercial Business Program


Commercial Program


The purpose of the Commercial Program is to prohibit unauthorized non-storm water discharges and reduce pollutants in storm water runoff from commercial facilities to the maximum extent possible.  Objectives of the Commercial Program consist of the following:

  • Conduct inspection of commercial sites located within the County’s jurisdiction. 

  • Provide outreach to commercial businesses. 

An inventory of commercial businesses located within the County’s jurisdiction is developed and maintained by the Storm Water Pollution Prevention Program.   To view a map of the County of San Joaquin area, click below.

County of San Joaquin Area Map




Commercial businesses that can produce significant sources of pollutants are (click on links for BMP fact sheets):



The County Storm Water Pollution Prevention Program will mail an invoice to your business to schedule a commercial inspection bi-annually.  When an unsatisfactory inspection arises, the inspector shall provide the business a report noting the violations and corrections needed for compliance.  Follow-up inspections will be conducted as needed.  To assist with a successful inspection, please view the County's Storm Water Pollution Prevention Program Commercial Inspection Report form below.

  Commercial Inspection Report Form


Beware of con artists posing as Storm Water Inspectors.  Storm Water inspectors have County Public Works badges.  If you're unsure about an inspector, call us at (209) 468-3055.




Inspections are performed to assess compliance with County storm water ordinances.  The County has a progressive enforcement and referral policy to ensure enforcement actions match the severity of violations and include distinct, progressive steps.  Noncompliance may include failure to implement Best Management Practices (BMPs), or other violation of County ordinances.  Click below to view the County's Storm Water Pollution Prevention Program Commercial Investigation-Enforcement Procedure.

 Commercial Investigation-Enforcement Procedure




Although the County may provide guidance to businesses on appropriate BMP selection and application, the selection of specific BMP’s to be implemented is the responsibility of the business.


Commercial outreach activities available include giving presentations and distributing educational materials during commercial inspections; the Public Works Customer Service counter; and talking with staff at outreach events such as the Home and Garden Show. (See our Public Outreach page)


If interested, environmental stewardship programs are available through the Green Team of San Joaquin to help businesses and organizations go green.  Click below to visit Green Team of San Joaquin.  

Green Team of San Joaquin


Mobile Business Pilot Program


Mobile businesses can produce temporary or intermittent sources of pollutants that may impact water quality, some of those businesses are:


  • Automotive washing and detailing
  • Commercial pesticide applicators
  • Concrete pouring contractors
  • Concrete curing contractors
  • Landscape installation/maintenance
  • Portable toilet rental and maintenance
  • Swimming pool maintenance
  • Carpet Cleaners
  • Street sweepers
  • Paint contractors
  • Pressure washers
  • General building contractors
  • Swimming pool contractors



The County’s Mobile Business Pilot Program: Carpet Cleaners Implementation Strategy was adopted in June 2010.  The strategy addresses inventory, inspections, outreach/education, and enforcement. Click the link below to access the Carpet Cleaners Implementation Strategy.

Carpet Cleaners Implementation Strategy 

Frequently Asked Questions(FAQ)


What are Commercial Storm Water Inspections? A Commercial Storm Water Inspection is an on-site evaluation of how business related functions such as outdoor activities, outdoor equipment, outdoor materials, and waste are being managed in order to protect water quality and protect against illicit discharges to the storm water system.


What are commercial businesses required to do? They will be required to implement best management practices (BMP’s) to ensure pollutants are not discharged into the storm water collection system or water bodies within the County’s limits. They will be required to implement best management practices (BMP’s) to ensure pollutants are not discharged into the storm water collection system or water bodies within the County’s limits.


How often will my business be inspected? The County’s National Pollutant Discharge Elimination System (NPDES) Permit and Storm Water Management Plan (SWMP) mandate commercial business to be inspected every other year..

*Note: If a business has violations, follow-up inspections will be required.


What are typical things that inspectors will look for?      


Sources of storm water pollution include, but are not limited to the following:

  • Discharges from commercial vehicle and equipment washing to the storm drainage system..
  • Evidence of dumping materials and wastes into the storm drainage system..
  • Evidence that work areas such as oily service bays are being hosed out and discharged into the storm drainage system..
  • Leakage from barrels and other outdoor containers..
  • Power washing discharges to the storm drainage system..
  • Discharges to the storm drainage system of materials such as concrete, paint, automotive fluids, etc..
  • Mismanagement of hazardous wastes..
  • Oily, dirty items such as engine parts that are left outdoors exposed to rainfall..
  • Other poor housekeeping practices that result in the exposure of pollutants to storm water..
  • Exposure of process activities and equipment to rainfall that is likely to result in pollutant wash-off..
  • Open containers of liquids and other materials that are left outdoors..
  • Track-out of sediment and other materials from facilities onto roadways, and from indoor areas to outdoor areas..
  • Evidence of failure to maintain grease traps and interceptors..
  • Failure to properly manage leaks and spills.

*Note: The storm drainage system includes storm drains, roadside drainage ditches and all manmade and natural water conveyance systems such as channels, creeks, etc..

What will happen if violations are found at my business?? When an unsatisfactory inspection arises, the inspector shall provide the business a notice of violation requiring the business owner to correct the violation(s) within a reasonable specified timeframe. In many cases, a follow-up inspection will be required to assure the corrected business practices have met compliance..

What are the storm water inspection fees?    Commercial Storm Water Inspection fee is $55.  This is not a new requirement for businesses... If the commercial site has storm water violations a Re-Inspection fee of $285 will be assessed..

What if my business activities are not exposed to storm water? Am I still required to be inspected?? Yes, Business owners must also eliminate non-storm water discharges and implement BMPs to continually reduce pollutant sources associated with their everyday business activities. It may be helpful to speak with the County’s Storm Water Inspector to better understand the specific guidelines and storm water requirements and how to maintain an environmentally compliant facility. Program staff can be reached at 1-866-755-4955..

My business is covered under the State of California's General Industrial Storm Water Permit. Do I still require an inspection??      Yes. Businesses that are covered under the State of California's General Industrial Storm water Permit also require inspection. The inspections are to ensure compliance with the County's Storm Water Management Plan and County storm water ordinances, but inspectors will verify that General Permitted businesses have State-required Storm Water Pollution Prevention Plans (SWPPPs)..

How can I prepare my business for inspection?    Start by familiarizing yourself with potential and actual sources of pollutants at your business. Observe storm drains and nearby waterways that could receive drainage from your facility. Determine whether materials, equipment or activities are in contact with storm water. Consider what will happen to exposed pollutants when it rains at your facility, such as oil, grease, cement, sediment, chemicals, food waste, etc. that are either dumped or stored in outdoor, unprotected locations. And become educated by visiting the links below..

http://www.cabmphandbooks.com/                     http://www.bmpdatabase.org/index.htm    

To Learn How to Properly Dispose of Household Hazardous Wastes::

 San Joaquin River

HOUSEHOLD HAZARDOUS WASTE (209) 468-3066 or toll free 1-800-449-4840 or 1-800-CLEAN UP


Click on a link below to obtain additional storm water information


               Frequently Asked Questions          Glossary of Terms & Acronyms          Hazardous Waste Disposal

PO Box 1810 / 1810 East Hazelton Avenue, Stockton, California 95201    |    Phone  (209)  468 - 3055

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The Stormwater Pollution Prevention Program is a Program of the

San Joaquin County

Public Works Department

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