Soakaways & Drainage Fields in Cumbria
Help with failing, blocked, saturated or unsuitable septic drainage fields and off-mains effluent disposal problems across Cumbria.
“Soakaway” and “drainage field” are not always the same thing
In everyday conversation, many people call the discharge area a septic-tank soakaway. For sewage effluent, however, current Environment Agency guidance describes a drainage field or infiltration system: perforated pipes laid in trenches so wastewater can receive further treatment as it passes through the ground.
A conventional rainwater soakaway is different and may not meet the rules for sewage discharge. If you are unsure what you have, describe the system rather than relying on the name.
Signs a drainage field may be failing
Wet or boggy ground
Persistent wet patches, standing water or unusually lush growth around the discharge area can be a warning sign.
Recurring backups
If wastewater has nowhere to go, tank levels and household drainage problems can return quickly even after emptying.
Sewage smells
Persistent odours near the drainage area can indicate poor drainage or wastewater reaching the surface.
Slow discharge after emptying
If the tank is sound and recently emptied but the outlet remains slow, the downstream disposal system may need investigation.
Why drainage fields fail
There is no single cause. Problems can relate to age, soil and groundwater conditions, poor original design, physical damage, overloading or solids reaching the field because the treatment system was not desludged often enough.
That is why simply emptying the tank repeatedly does not necessarily solve a failed drainage field. The cause and the condition of the wider system need to be understood.
Repair or replacement?
Some issues may be localised and repairable. A genuinely failed or unsuitable drainage field may require redesign and replacement rather than repeated temporary fixes.
New drainage fields should be assessed and designed for the actual site and applicable rules. Current Environment Agency guidance refers to BS 6297:2007 for drainage fields and requires the treatment system to be large enough and operated correctly.
For current official guidance see GOV.UK: small sewage discharge to ground.
What to include in your enquiry
Tell us the postcode, system type, approximate age, when it was last emptied or serviced, what symptoms you are seeing, how long they have been present and whether the issue changes after heavy rain or after emptying.
If you know where the drainage field is located or have installation drawings, mention that too.
Drainage-field enquiries across Cumbria
We route enquiries across Carlisle & North Cumbria, Penrith & Eden, Kendal & South Lakes and West Cumbria.
Common questions
Can a failed soakaway be unblocked?
Sometimes a blockage is localised, but a drainage field that has structurally failed or become unsuitable may need replacement. Diagnosis should come before choosing a remedy.
Will emptying the tank fix wet ground?
It may temporarily reduce pressure on the system, but persistent wet ground around the discharge area can indicate a drainage-field problem that emptying alone will not correct.
Can I build over a drainage field?
Do not assume so. A drainage field needs to remain functional and accessible, and changes to the site can affect its operation. Get site-specific advice before building or heavily landscaping over it.
Suspect a failed drainage field?
Describe the symptoms, system and location and we’ll help route your enquiry towards an appropriate independent specialist.
Cumbria Off-Mains is an independent enquiry and referral service. We do not carry out drainage work ourselves.