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Ontario WaterWise

FREE Residential (Landscape) Irrigation Retrofit Program – available to qualifying Ontario Homeowners

  • Retrofit of existing irrigation controller/timer with a new "smart" controller
  • Assistance with programming the "smart" controller
  • Evaluation of how water is being used at the home and recommendations for improvement
  • Available for properties under 1/4 acre and over 1/4 acre
  • Resident must have a working sprinkler system and a non weather based irrigation controller
  • To apply, click here


Help your Trees Survive the Drought

It is important to water your trees during the drought even if you have reduced the amount of water used for irrigating your turf.  You can find a downloadable tree care sheet at the bottom of this page. Here are a few helpful tips:

  • Young trees need to be watered twice a week (about 5 gallons) while mature trees need to be watered once a week
  • Water the drip zone area directly beneath the foliage
  • Water early in the morning or after the sun has set

Inland Empire Landscape Contest Winner

Inland Empire Landscape Contest Winner

Ontario Municipal Utilities Company is proud to announce that Chris May is a local winner of the Inland Empire Landscape Contest. Mr. May was one 168 entries into the 2016 contest. To learn more about the Inland Empire Landscape Contest please visit

Waterwise Gardening Workshop

Ontario Municipal Utilities Company, the City of Upland, the City of Chino Hills and San Antonio Water Company are hosting a free waterwise gardening workshop. The workshop will be held on October 22, 2016 from 9 AM-11 AM. The workshop will be held at the following address: 1370 N Benson Avenue, Upland. The presenter will cover the following topics: Basic Landscape Design, Drought-Tolerant Maintenance and Irrigation. Please call (909)291-2930 to register for the workshop.

Every Drop Counts, Keep Saving Ontario                         

Congratulations Ontario Residents and businesses! With your help, Ontario has achieved a 20% water savings since June 1, 2015. 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 adequate local water supply. Please keep in mind that California has entered its fifth year in a drought and Ontario is still in Stage 2 water restrictions. The goal of Stage 2 water restrictions is to save 10-20%.

 Below are Ontario’s 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 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


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Ontario Municipal Utilities Company
1425 South Bon View Avenue
Ontario, CA 91761 

For questions please call (909) 395-2605 or email Public Works.

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