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Ontario WaterWise

Drip Kit Workshop

Attend a FREE workshop to receive an all-in-one Spray-To-Drip Retrofit Kit for planter beds. The Spray-To-Drip Retrofit Kits contain everything you need for drip conversion. The workshop will teach you everything you need to know.

  • September 23, 2017 from 9 AM-11 AM at the Chino Basin Water Conservation District
  • You must register at 
  • Please call the IEUA hotline at 909-993-1952 for more information

Inland Valley Garden Planner

    The Chino Basin Water Conservation District has launched a free, online tool to help residents in the Inland Empire design drought tolerant gardens and choose  drought tolerant plants. Please visit to learn more about this new resource.

FREE Mulch Giveaway  

  • October 13th at John Galvin Park and October 14th at 1530 S Cucamonga Avenue from 7am-1pm
  • Please bring your own shovel and containers
  • Contact 909-395-2633 for more information

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

FREE Landscape Evaluation

The Chino Basin Water Conservation District offers FREE outdoor water evaluations for customers living or doing business within the Inland Empire Utilities Agency boundaries. Please visit or call 909-626-2711 for more information.

FREE Sprinkler Nozzles

High-efficiency nozzles can increase your water efficiency up to 30%. Ontario residents can get up to 25 free high-efficiency nozzles by following the steps below:

  • Determine the number of nozzles and types of nozzles you need
  • Log on to , be sure to have the water account name and number handy
  • Print your voucher and take it to a participating supplier


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

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 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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