To avoid dealing with a blocked soakaway in the future, follow these prevention tips:

In soakaways receiving septic tank effluent, anaerobic bacteria produce a slimy organic layer (biomat) at the soil interface. While a thin biomat aids treatment, excessive thickness completely seals the soil pores. This is often irreversible without replacing the drainage field.

Water enters the underground system via solid drainage pipes.

Note: This paper is a synthesis of common technical knowledge on soakaway failure. For specific legal or engineering advice, consult a qualified drainage engineer.

If DIY solutions don't work, or if you're unsure about the cause of the blockage, it's time to call a professional. A qualified technician will:

Squishy, muddy patches or standing water forming directly over or near the soakaway site during dry weather.

The water flows into perforated pipes embedded within an underground pit.

The water temporarily pools in the voids of the aggregate or crates before naturally percolating down through the geotextile membrane fabric and into the surrounding soil. 5 Common Causes of a Blocked Soakaway