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NEWS - Development Services

Posted on: October 3, 2022

What is the Model Water Efficient Landscape Ordinance (MWELO)?

MWELO Fall 2022 News article pic

What is the Model Water Efficient Landscape Ordinance (MWELO)?  

MWELO is a statewide water efficiency law for new and renovated landscapes in California. It sets limits on high water use plants and irrigation equipment. Research has shown that creating and maintaining landscapes that meet MWELO use 80% less water, require 60% less maintenance and produce 50% less yard waste. The ordinance encourages the use of a variety of plants, including natives, climate-appropriate plants. Limited size lawns and non-adapted plants can also be planted. 

Any single-family or multi-family residential, public, institutional, or commercial project that requires a permit, plan review, or check from the local review agency AND meets one of these size thresholds needs to comply: 

  • New construction project with a total landscape area* greater than 500 sq. ft. 
  • Rehabilitation of existing landscape with a total landscape area* greater than 2,500 sq. ft. 

* Total landscape area includes swimming pools, fountains, and other water features. 

To learn more about the MWELO ordinance, visit www.danville.ca.gov/MWELO 

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