Ontario WaterWise

Every Drop Counts, Keep Saving Ontario!                         


Ontario has recently moved into Stage 2 of the Water Conservation Plan. The  Stage 2 water use restrictions are listed below. Please visit the Programs and Rebates section of the website for more information on the water saving programs available to residents and businesses.

For questions, contact us at  waterwise@ontarioca.gov


Water Saving Tips


  • Install Aerators on Bathroom Faucets
  • Saves 1.2 Gallons per Person/Day
  • Install a High-Efficiency Toilet (1.28 Gallon per flush
  • Saves 13 Gallons per Person/Day
  • Install Efficient Shower Heads (2 Gallons per minute)
  • Saves 1.2 Gallons per minute 
  • Turn off Water When Brushing Teeth or Shaving
  • Saves 10 Gallons per Person/Day
  • Fix Leaky Toilets
  • Saves 30-50 Gallons per day/toilet
  • Wash Only Full Loads of Clothes
  • Saves 15-45 Gallons per load
  • Take 5 Minute Showers Instead of 10 Minute Showers
  • Saves 10 Gallons (with a water-efficient showerhead)
  • Check for Broken Sprinklers and Leaks
  • Saves up to 200 Gallons per day
  • Cut Back Irrigation Times
  • Saves 3-15 Gallons per minute per sprinkler head
  • Skip a Day of Watering
  • Saves up to 250 gallons per week



Do residents need to get permission before filling up a pool? Are there discounts available for pool fills?

Ontario residents do not need to get permission to fill up their pools. There are no discounts available for pool fills however residents can contact Revenue, at 909-395-2050, for an estimate of what it will cost to fill up their pool.

Are there any non-permitted days for watering turf and other plants?

Ontario residents are encouraged to apply water to their landscape no more than every other day. Watering should take place before 6 am or after 6 pm.

Are there are any rebate programs available for removing turf and replacing it with drought-tolerant plants?

There is currently a rebate available for removing turf and replacing with drought tolerant plants. You can find out more information about this program by visiting the programs and rebate section of the website.

Is there a rebate available for replacing live turf with artificial turf?

There is no rebate available for artificial turf. The Turf Replacement rebate is available for replacing turf with drought tolerant plants.

Am I allowed to wash my car?

Under the current water restrictions, you are encouraged to wash your vehicles with an automatic shut off nozzle on the hose. Taking your car to the carwash is a much more efficient use of water and reduces the amount of run-off produced.

Where can I get free mulch?

The City of Ontario holds two mulch giveaways a year, please call (909)395-2633 for more information. In addition, the Waterwise Community Center gives away free mulch twice a month.

Stage 2 Water Use Restrictions

The following includes Stage 2 water use Restrictions as well as some of the Stage 1 water use restrictions that are also in effect: 

  • Except as required for health or sanitary purposes, washing of sidewalks, driveways or other paved surfaces is prohibited.
  • Washing of motor vehicles shall only be done with a hand-held bucket or a hose equipped with a positive shutoff nozzle. 
  • All water customers shall promptly repair all leaks from indoor or outdoor plumbing fixtures.
  • No person shall irrigate between the hours of 9:00 a.m. and 4:00 p.m.
  • No water customer shall cause water to run off landscape areas into adjoining streets, sidewalks, or other paved areas. 
  • All customers are prohibited from irrigating during and within 48 hours following measurable rainfall. 
  • All persons are prohibited from irrigating with potable water any ornamental turf on public street medians. 
Resource Links

General Water Conservation Information

The Metropolitan Water District of Southern California Program

Inland Empire Utilities Agency

Chino Basin Water Conservation District


How to Landscape the WaterWise Way

Be WaterWise Landscaping

Water Conservation: Around the Yard


Free resource for planning a drought tolerant garden with plant pictures,  garden styles and plant lists.

Educator Resources
  • Classroom visits and free water conservation classroom presentations are available to classrooms within the OMUC service area. Please call 909-395-2614 or send an email to WaterWise@ontarioca.gov for more information.
  • The Inland Empire Utilities Agency Education (IEUA) offers free fieldtrips and educational assemblies for schools in their service area. Please visit ieua.org/ to learn about the programs available through IEUA.
  • The Waterwise Community Center offers free fieldtrips to classrooms. Please visit cbwcd.org for more information.
  • The Water Education/Water Awareness Committee offers scholarships and grants for teachers. Please visit www.usewaterwisely.com for more information.



Downloadable Files