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Percolation Testing
Percolation Testing
Percolation Testing for Septic Tanks & Treatment Plants
If you’re installing or upgrading a septic tank or package sewage treatment plant, you need to know whether the ground can safely absorb treated effluent. That’s where percolation testing comes in.
ICE Drainage provides percolation testing and practical drainage field advice for commercial and hospitality sites across London and the Home Counties.
To book a percolation test or discuss a project, call 0203 870 1067 or email contactus@icedrainage.co.uk.
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What Is a Percolation Test?
A percolation test (often shortened to “perc test”) measures how quickly water drains through the soil.
It helps determine whether a site is suitable for:
- A drainage field / soakaway / infiltration system
- A septic tank or treatment plant discharge to ground (where applicable)
In short: it’s a key step in designing a system that works long-term — not just on day one.
Speak with me today,
I’m here to help
By asking you a few questions either via phone or email I can immediately provide a realistic estimation of the cost.
Emergency Hotline
0203 870 1067
Helpline open 24 hours a day, 7 days a week
When calling please have
the following ready:
- Your Name
- Company Name (if applicable)
- Site Postcode
- The problem you're having
- Email Address
Get a Quote
You’re in good company. We’ve worked with the following commercial clients… View all
Why choose us?
- Cater to a wide variety of drainage situations
- Nationwide coverage, available 24/7
- Cater to commercial and domestic clients
- Free survey provided prior to quotation
- Emergency response team
- Offer a bespoke service designed to suit all your needs
- All technicians hold professional health and safety qualifications
When Do You Need Percolation Testing?
Percolation testing is commonly required when:
- Installing a new septic tank
- Installing a new package treatment plant
- Replacing an existing system
- Building an extension or changing site use (increased occupancy/flows)
- A drainage field has failed and you need to understand why
- You need evidence to support design decisions and compliance documentation
If you’re unsure whether you need a test, call 0203 870 1067 and we’ll point you in the right direction.
Why Percolation Testing Matters (Commercial & Hospitality)
For commercial sites, the consequences of getting this wrong are expensive:
- Drainage fields that saturate and fail early
- Ponding, odours, complaints, and operational disruption
- Repeat emptying/pump-outs that treat the symptom, not the cause
- Costly remedial works and emergency decisions
Percolation testing helps you design a system that matches the ground conditions and the real-world loading of your site.