Tree Benefits: Shade, Savings, and Sustainability

Trees shade a home and patio.
Check out these trees shading a home and patio!

Cristal Castro, Water Use Efficiency Programs Analyst I, Municipal Water District of Orange County 
March 31, 2026

Did you know trees play a vital role in the water cycle? Trees improve our lives while helping us use water efficiently and cool our neighborhoods. They improve environmental health by filtering air and water pollutants, reducing stormwater runoff, and creating habitats that support local biodiversity.

Participants of MWDOC’s Turf Replacement Rebate Program (Program), which incentivizes converting lawn grass to Orange County Friendly gardens, can receive an additional $100 for each tree planted in their garden, up to five trees. Certain trees also qualify to meet the Program’s stormwater retention requirement, making it easier for participants to successfully enhance their yards and receive multiple incentives. Transform your lawn into a beautiful garden and include a magnificent tree! Check out MWDOC’s tree resources!

 

1. Beautiful Tree = Beautiful Neighborhoods

Have you sat under a tree on a hot day and noticed how much cooler it is? Trees cool our neighborhoods and help offset urban heating. Trees provide shade in your garden, allowing for a diverse plant palette that requires less water. Tree shade can also help to cool your home, letting you turn down the AC.

Trees “breathe” in pollutants and carbon dioxide to help clean our air and combat global climate change. Trees can also attract butterflies, hummingbirds, and other pollinators to your garden. Imagine waking up on a spring morning, drinking a cup of coffee, and looking out your window to see two butterflies dancing around each other!

2. The Role of Trees in the Water Cycle

Trees play an important role in the water cycle by absorbing rainwater and irrigation water and releasing water vapor into the air. Trees absorb water and reduce stormwater runoff as their roots penetrate the soil, increasing the ability for water to enter the ground. Leaves and branches in the tree canopy, along with the trunk, catch, absorb, and slow rainwater, further reducing runoff.

The United States Environmental Protection Agency lists trees as a green infrastructure best management practice for reducing stormwater runoff. Trees use water to convert sunlight into energy and release any remaining water into the air as vapor.

Tree roots also filter contaminants and help to improve water and soil quality. They can transform or hold harmful substances into nutrients that are stored in their bodies. This results in healthier soil for plants or for people to play on!

3. Orange County Tree Achievements

This Arbor Day, MWDOC celebrates two years of the Tree Incentive Program. Since its launch in March 2024, Orange County has installed more than 600 trees through the Turf Replacement Program. That’s almost one tree per day! Nearly two-thirds of Program participants choose to plant trees in their landscape. One Yorba Linda resident planted over 15 trees! These trees add beauty and privacy to the yard, create habitat for wildlife, and provide shade to help cool temperatures in and around the home.

As trees mature, benefits increase. Established trees typically require less water, absorb more carbon dioxide, and provide more shade. Proper tree maintenance is important to keep them healthy.

Popular trees planted in Orange County’s water-wise gardens include Strawberry Madrone, Brisbane Box, varieties of fruitless olives, and MWDOC’s top-pick, Coast Live Oak. If you’re interested in planting trees at your property, check out the Orange County Favorite Trees List!

Dry riverbed that captures rainwater
Another view of the yard, showing a gorgeous dry riverbed that captures rainwater!
Dry riverbed in turf replacement project
Front yard view of a Yorba Linda resident’s home who participated in MWDOC’s Turf Replacement Program. The trees will grow to provide privacy and shade!

4. All About Trees!

Do you want to learn more about trees? The following resources are great to grow your tree knowledge!

Check out these resources on finding the right tree for the right place – mwdoc.com/tree

“The best time to plant a tree was 20 years ago, the second-best time is now.” – anonymous