Ontario WaterWise

Every Drop Counts, Keep Saving Ontario!                         


Congratulations Ontario Residents and businesses! With your help, Ontario has achieved a 10% water savings since July 2016. Due to improved water conditions statewide, the State Water Resources Control Board has removed mandatory conservation targets. In response, on June 21, 2016, the City eliminated excess water use penalties. The recent water saving efforts and local water supply investments ensure that Ontario has an adequate local water supply. Please keep in mind that Ontario is still in Stage 2 water restrictions. The goal of Stage 2 water restrictions is to save 10-20%.

For questions, contact us at  [email protected]


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



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

Ontario residents can apply water to their landscape any day of the week. Watering must take place before 9 am or after 4 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.

How do I request approval for filling or refilling my pool?

The current water restrictions require that residents get approval prior to filling or refilling their swimming pool. Residents can fill out the pool request form by clicking on the button located on the top right-hand side of the website or by visiting the following website http://www.ontarioca.gov/pool-fill-request-form.

Am I allowed to wash my car?

Under the current water restrictions, you may wash your vehicles as long as you use 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 Chino Basin Water Conservation District gives away free mulch twice a month.

Stage 2 Water Use Restrictions
  • No hose washing of sidewalks, walkways, driveways, parking areas or other paved surfaces
  • No hose washing of an automobile without a fitted shut-off nozzle
  • No public place (ie. restaurant) where food is served, shall serve water unless requested by customer
  • No person shall water outdoor landscaping between the hours of 9 AM and 4 PM
  • No person shall allow water to be applied to outdoor landscapes in a manner that causes runoff
  • No filling or refilling empty swimming pools without permission from the City
  • Newly constructed homes and buildings shall irrigate in a manner that is consistent with the California Building Standards Commission and Department of Housing & Community Development
  • Prohibit irrigating turf or ornamental landscape during and within 48 hours following measurable rainfall
  • Operators of hotels and motels must provide guests with the option of choosing not to have towels and linens laundered daily and prominently display notice of this option
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
  • The Water Education/ Water Awareness Committee is awarding four $1,500 scholarships to high school seniors for submitting an essay on the following topic, "What do you think is the greatest threat to our water supplies in Southern California over the next 25 years? Why? How would you address those threats?" The deadline to submit an essay is January 23, 2020. Please visit usewaterwisely.com for more information.
  • 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 [email protected] 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.


Downloadable Files