Commercial, Industrial and Institutional Non-Functional Turf Irrigation Ban

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The State has instituted a state-wide ban on irrigation of decorative or non-functional turf with potable water in commercial, industrial and institutional settings. This regulation applies to turf (mowed grass) that is ornamental and not otherwise used for recreation.

The irrigation ban does not apply to:

  • residential (single and multi-family) lawns
  • school fields
  • sports fields
  • areas regularly used for civic or community events

The State estimates that ending irrigation of non-functional turf state-wide will save the equivalent of water used by as many as 780,000 households every year. It is important to note that the regulation does not restrict the watering of non-turf plantings or trees, which are essential for shade and cooling as the state experiences more extreme heat events.

CII Non-Functional Turf Information Sheet

Non-Functional Turf Slides

Resources for Turf Conversion

Landscape irrigation can account for up to 65% of water use in the Sacramento Valley. Converting non-functional turf to water-wise landscaping can reduce water use and potentially lower your water bill. Visit the water-wise landscaping page for information on plant choice and a list of water-wise landscaping resources.

During the last drought, the City of Woodland and Yolo Resource Conservation District developed water-wise landscape plans with turf alternatives for mow strips. These plans include planting lay-outs and irrigation installation and timing instructions. There are four planting plans:

The UC Davis Arboretum and Public Garden also offers a variety of printable planting plans:

When converting non-functional turf, please be mindful of any trees that may be supported by the existing irrigation system. If you have trees in otherwise non-functional turf that is irrigated by sprinklers, consider converting your irrigation to drip irrigation.  Drip irrigation applies water slowly onto the soil, allowing the water to infiltrate into the root zone of the tree to ensure it continues to receive water. Learn more about converting to drip irrigation on the irrigation page and find more information on caring for trees on the urban forestry page and at treedavis.org

State FAQs on the Non-Functional Turf Irrigation Ban

Full text and complete list of State FAQs on the Non-Functional Turf Irrigation Ban

What is the definition of “turf”?

The State defines turf as “a ground cover surface of mowed grass.” This official definition of turf can be found in section 491 of title 23 of the California Code of Regulations.

What is “non-functional turf”?

Non-functional turf is defined by the State as a ground cover surface of mowed grass that is ornamental and not otherwise used for human recreation purposes. Non-functional turf does not include school fields, sports fields, and areas regularly used for civic or community events.

Does the non-functional turf irrigation ban apply to residential properties?

No, residential properties may continue to irrigate turf, subject to local rules. The Board encourages people to reduce turf irrigation on their properties and to convert turf to water-wise plants, but those are not required by this regulation. For more information and practical tips for converting your landscape and making your yard more water-wise, visit SaveOurWater.com.

Are there any exceptions to the non-functional turf irrigation ban?

The ban only applies to irrigation of non-functional turf in the commercial, industrial, and institutional sectors and only applies to irrigation with potable water. It does not apply to residential lawns or any turf that is regularly used for human recreational purposes, such as community spaces, or sports fields and other turf spaces used for recreation or events. The regulation does not ban the irrigation of trees or other non-turf plantings.

May people use recycled water or greywater to irrigate turf?

Yes, however the Board encourages people to prioritize irrigation of trees and other plants due to the severity of the drought and the amount of water required for turf.

Does the regulation affect trees? Do urban trees need to be watered?

The regulation does not restrict the watering of trees, just turf. Although most mature trees often require little to no irrigation, some species do. The Board urges people to continue to water trees, even while reducing or stopping the irrigation of turf. Trees that are just getting established may need to be watered more frequently, including hand watering. Trees near or on non-functional turf could be impacted by some responses to the ban on turf irrigation, but the regulation allows continued irrigation of trees even if turf, such as turf under trees, will receive water. For more information about tree species and water needs, visit the Save Our Trees section within SaveOurWater.com.

Homeowners’ Associations (HOAs) & HOA Residents

The regulation applies to HOAs but only to non-functional turf on property the homeowners’ association (HOA) owns, not residences. While an individual’s property is considered residential, property owned and maintained by an HOA is considered the same as landscapes owned and maintained by commercial or institutional entities. This means that the regulation does not prevent homeowners from irrigating turf; it prohibits the irrigation of non-functional turf (with potable water) on property an HOA owns. However, the regulation does not ban the irrigation of turf used for recreation or community activities.

An HOA should review areas of turf that it maintains, consult with residents, and determine whether the turf is functional or not. Water suppliers may defer to HOAs’ determinations that specific areas of turf are used for recreation or community events.