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Septic tips

Heavy Rain and Your Septic System: What Texas Home Owners Should Know

By the Foster’s Team · October 19, 2026

Rain pouring off a roof in a storm
Photo: A A on Unsplash

Central Texas can go months with no rain, then get a foot in a weekend. Your septic system feels that.

What rain does to a drain field

Your drain field needs dry soil to soak up water from the tank. When the ground is already full of rain, the water from your house has nowhere to go. Drains slow down. Toilets may gurgle. In bad cases, water backs up.

During a big storm

  • Use as little water as you can
  • Wait to run the washer and dishwasher
  • Keep rain gutters pointed away from the tank and field
  • Don’t drive or park on the drain field

Should you pump right after a flood?

Not always. When the ground is soaked, an empty tank can shift. Plastic tanks can even float up. We may tell you to wait a few days for the ground to dry. Give us a call and we’ll help you decide.

Aerobic systems and power

If the power goes out, your air pump and spray pump stop. Use less water until the power is back. If an alarm comes on after, call us.

Once things dry out, keep an eye on your drains. If they stay slow for more than a few days, it’s time for a checkup.

The Foster’s Team
Foster’s Septic, Maxwell, TX

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