Rain barrels collect rainwater from your roof downspouts for use in watering your garden and landscape. A typical 50 gallon barrel costs $100 to $300 depending on material and features. Collecting rainwater is legal in Texas, and many homeowners use it to reduce their municipal water bill during summer months.
In San Antonio, where summer watering restrictions are common, a rain barrel provides a free source of water for your plants. Even a single barrel can save hundreds of gallons per year.
How Rain Barrels Work
A rain barrel connects to your gutter downspout through a diverter or simply sits under a downspout cut. When it rains, water flows from the roof into the barrel instead of going down the storm drain. A mesh screen at the top keeps out leaves, mosquitoes, and debris. A spigot near the bottom allows you to attach a garden hose or fill a watering can. Most barrels hold 40 to 60 gallons.
Legality in Texas
Rainwater harvesting is legal and encouraged in Texas. The Texas Water Code specifically allows rainwater collection for outdoor and non-potable indoor uses. Some municipalities, including San Antonio, offer rebates or incentives for installing rain barrels. San Antonio's WaterSaver Rainwater Rebate program can offset part of the cost. Check with SAWS for current rebate amounts.
Cost and Installation
Basic 50 gallon plastic rain barrels cost $80 to $150. Decorative styles that look like terracotta or wood run $150 to $300. Installing a rain barrel is a simple DIY project. You cut your downspout at the right height, attach a diverter or bend the downspout into the barrel opening, and place the barrel on a level surface. Raising the barrel on cinder blocks improves water pressure at the spigot.
Rain Barrel Water Savings
A single 50 gallon barrel captures about 300 gallons per inch of rain on a 500 square foot roof section. In San Antonio's average 30 inches of annual rainfall, one barrel fills and empties 15 to 20 times per season, providing 750 to 1,000 gallons of free water. That can save $20 to $50 annually on your water bill depending on your rate tier.
