Preventing Water Pollution

When water flows off our streets, it carries trash, oil, and other pollutants with it through the storm drain system and local waterways, to the Santa Ana River, and eventually to the Pacific Ocean.  These bodies of water are used for recreation, groundwater recharge, and are home to local wildlife.

Residents can keep stormwater pollutants out of the storm drain system by:

  • Placing litter in the trash can or recycling container, not down a storm drain or into the street.
  • Using pesticides and fertilizers only when necessary and never allowing them to be washed into the street by rain or sprinkler runoff.
  • Rinsing water-based paints off of painting equipment in the sink instead of the curb.
  • Sweeping up yard clippings and placing them into your green waste container.
  • Fencing off stream side areas to keep horses away from waterways.

Proper Pool Maintenance Helps to Keep Pollutants Out of Our Waterways And Protects The Environment
Chlorine and other pool chemicals can harm our waterways when they are improperly discharged. Here are five easy steps to properly discharge your swimming pool water: 

  1. Shut off the chlorination system or stop adding chlorine.
  2. Hold the water in the pool for at least five days or add a de-chlorinating agent.
  3. Use a pool testing kit to ensure the level of chlorine is at 0.1ppm before discharging the water. Make sure all debris is removed and chemicals are dissipated. The water’s pH should be between 6.5 and 8.5 before discharging. Make sure the water is free of any discoloration, mosquitoes, dirt, or algae.
  4. Submit a Non-Storm Water Discharge Notification Form to the Engineering Services Department before you drain your pool. You can download the form here.
  5. Drain the pool water through your lawn or landscaped area. The flow should be controlled to prevent erosion problems, or from entering your neighbor’s property.

Saltwater Pools: Please note that the water from saltwater pools should only be drained to the sewer or hauled away. Check with the Cucamonga Valley Water District for requirements for discharging to the sewer by calling 909-944-6000.

Please remember:

  • Properly dispose of filter and backwash solids in the trash or landscape area.
  • Neutralize acid washes before discharging to the sewer.
  • Do not discharge to the storm drain.

Call the Environmental Programs Info Line at (909) 919-2635 if you have any questions.

Print-ready publications: 

Businesses can go to the business section of the San Bernardino County Stormwater Pollution Prevention  website to get information about best management practices to prevent stormwater pollution.

If you observe illegal dumping or the release of known or suspected hazardous materials, call 911 immediately.  Stay away from the material and spill area and also keep others away. 

To report non-emergency violations, call the 24 hour pollution hotline at (877) WASTE18 or complete a form online at

For information about proper disposal of household hazardous waste, collection facilities, and hours of operation call (800) OILYCAT or visit