Why Septic Systems Overflow After Heavy Rain

What Is Rain-Related Septic Overflow?

Heavy rain saturates the soil, slowing how quickly treated effluent can absorb. When the drainfield is saturated, wastewater can back up into the tank and home.

Signs of Rain-Related Overflow

Gurgling toilets or slow drains during or after storms
Standing water or soggy soil over the drainfield
Sewage odors outside, especially in low spots
Backups in basements or lowest-level fixtures

Why This Matters for Homeowners in La Grange, Gonzales, Schulenburg, Flatonia, and Shiner

South Central Texas storms hit hard. Clay soils around La Grange, Gonzales, Schulenburg, Flatonia, and Shiner hold water, so drainfields drain slower and overflow risk rises after every downpour.

What To Do Before Calling a Professional

Pause high-water-use appliances until rain stops
Check for gutter downspouts aimed at the drainfield and redirect them
Keep people and vehicles off the saturated drainfield
If wastewater backs up indoors, call for emergency pumping

How To Prevent This Issue

Grade soil so surface water sheds away from the tank and field
Extend downspouts and add splash blocks
Pump on schedule to keep sludge low and capacity high
Add risers for faster, cleaner service visits

When To Call MUDD BOYS

If your septic tank is overflowing or backing up, call MUDD BOYS at (830) 203-4005 for 24/7 emergency service in South Central Texas.