The following link will take you to the Texas A&M AgriLife Extension Service Rainwater Harvesting site where you will find most all of the information you need to start capturing rain water at your home or business.
WE ARE IN STAGE 5 WATER RESTRICTIONS-NO OUTSIDE WATERING.
Water Wise Tips & Landscape Care
CATCH RAIN WATER ANY WAY YOU CAN. Set buckets or tubs where the valleys of your roof drain if you don’t have gutters and down spouts. If you do have down spouts, consider shortening them and get a rain barrel or two for them to empty into.
Catch the initial cold water while waiting for the hot water in your shower and sinks.
Consider planting vegetables in your existing flower beds or in containers instead of your regular vegetable garden to help reduce the amount of water you use.
Use drip irrigation or soaker hoses in beds or gardens to get water where it needs to be without wasting water from a hose end sprinkler.
When watering, especially during drought, water deeply and infrequently and water early in the morning whenever possible, and always follow any watering restrictions put in place by your water provider. Be sure your beds are mulched with 3 inches of hardwood mulch and in your vegetable garden, use straw, compost, leaves and you can even use hardwood mulch there as well. Be sure to water around your foundation on clay soils.