Rainwater Harvesting

Texas’ water supply planning process has identified that surface and groundwater supplies will not be able to meet future water demand. Water conservation and development of alternative water supplies are necessary to meet our growing demand for fresh water.

Rainwater harvesting is an innovative alternative water supply approach anyone can use. Rainwater harvesting captures, diverts, and stores rainwater for later use. Captured rainwater is often used in landscaping, because the water is free of salts and other harmful minerals and does not have to be treated. It is also useful in attracting, and providing water for, wildlife.

Implementing rainwater harvesting techniques directly benefits our state by reducing demand on the water supply, and reducing run-off, erosion, and contamination of surface water.

In many communities, 30 to 50 percent of the total water is used for landscape irrigation. Capturing rainwater for use in the landscape makes an efficient use of a valuable resource, reducing water bills and reducing demand on water supply. 

Rainwater harvesting can also help to prevent flooding and erosion, turning storm water problems into water supply assets by slowing runoff and allowing it to soak into the ground. Reducing run-off also helps to reduce the contamination of surface water with sediments, fertilizers, and pesticides in rainfall run-off.