- Terrace Wood Farm, St Marys Lane, Hertford SG14 2LF
Choosing the wrong septic tank or drainage solution can lead to extra costs, delays, and compliance issues. Willowmead helps you get it right from the start with expert advice, proper site assessment, and professional installation.
With over 20 years of hands-on experience in groundwork, drainage, and property development, our team can assess your property, explain your options clearly, and recommend the right septic tank or sewage treatment plant solution.
From the first survey to the final installation, we make the process simple, clear, and stress-free.
Why homeowners choose Willowmead:
✅ Honest advice before you commit
✅ Free site survey and clear quote
✅ Septic tank installation and replacement
✅ Treatment plant upgrade options available
✅ Professional installation from start to finish
Request a quick callback for free, expert advice from our local team.
Guaranteed compliance with the latest UK Environment Agency standards.
Delivering world-class wastewater technology engineered for excellence.
If your property is not connected to mains drainage, you may need a septic tank or sewage treatment plant to manage wastewater safely.
A septic tank collects wastewater from your home, separates solids from liquid waste, and sends the remaining effluent into a drainage field where it is filtered through the soil.
Wastewater from toilets, sinks, showers, baths, and washing machines flows into the tank. Solids settle at the bottom, while natural bacteria help break down the waste. The liquid then passes into a suitable drainage field.
Septic tanks must not discharge directly into a stream, ditch, or watercourse. If this is required, a sewage treatment plant is usually the better option.
Although septic tanks can still be suitable in some situations, they are often less efficient than modern sewage treatment plants. A septic tank only provides basic treatment, so the drainage field plays an important role in further filtering the wastewater before it returns to the environment.
Common septic tank problems include blocked or failed soakaways, unpleasant smells, slow drainage, standing water in the garden, and non-compliant discharge arrangements. Septic tanks also need regular emptying and maintenance to keep them working properly.
For many homeowners, especially those with older systems, replacing a septic tank with a modern sewage treatment plant can be a cleaner, more reliable, and more regulation-compliant solution. Willowmead Treatment Plants specialises in residential sewage treatment plant installations throughout Hertfordshire and offers free site surveys to assess your current setup and recommend the right solution.
If you are unsure whether your septic tank is compliant, your drainage field has failed, or you are planning a new off-mains drainage installation, Willowmead can help.
Our team can advise on plant sizing, decommissioning an existing septic tank, gravity or pumped outlets, drainage fields, estimated costs, and the best compliant system for your property.
Book a free, no-obligation site survey today.
Call Willowmead Treatment Plants on 01992 307960 or 07812 687026, or complete the Quick Contact form and we’ll call you back.
Bad smells, slow drains, soggy ground, or standing water in your garden can be signs that your septic tank drainage field or soakaway is failing.
If the system is not dealing with wastewater properly, the problem can become more expensive if left untreated. Willowmead can inspect your existing setup and advise whether you need a drainage field replacement, septic tank upgrade, or a modern sewage treatment plant installation.
With a free site survey, you’ll get clear advice, understand your options, and know the best solution before you commit.
Common signs of a failing drainage field:
✅ Bad smells around the tank or garden
✅ Slow-draining toilets, sinks, or showers
✅ Soggy patches or standing water
✅ Blocked or overflowing septic system
✅ Old septic tank that may need upgrading
Book a free site survey today and get expert advice from Willowmead Treatment Plants.
Chris and his team recently decommissioned a septic tank for us and installed a new treatment plant. We were really impressed at how the team carried out the work, keeping any mess to a minimum and thoroughly tidying up each evening. Very professional job from start to finish and would definitely recommend.
Chris and team did an excellent job. Firstly taking us through the entire process of installing a treatment plant and drainage field. Great job done to schedule and hassle free. Job well done. I would highly recommend their services to anyone interested in installing a treatment plant.
This was an utterly painless experience from start to finish, and Chris is an absolute joy to work with. Professional, thoughtful, knowledgeable and totally reliable. Highly recommended to anyone in need of treatment plant services.
We needed a new treatment plant to replace an end of life septic tank / soakaway. So glad we choose to use Willmead to undertake the work. Excellent, friendly communication throughout and great quality of work on site. Would not hesitate to recommend.
great service throughout, can't fault Chris and the team, would highly recommend, spot on!
Willowmead is dedicated to providing specialized sewage treatment solutions tailored to the diverse needs of our clients. Our array of services ensures your sewage treatment system is efficient, environmentally friendly, and regulation-compliant. Here’s what we bring to the table:
We specialize in supplying and installing sewage treatment systems tailored to your property's needs.
Willowmead's BRE Digest 365 Infiltration Testing service
All Treatment Plants must now be serviced annually. Keeping a record of maintenance is essential to ensure they work properly when releasing water into the ground or watercourses
We provide expertly designed and installed drainage fields that effectively manage the discharge from your sewage treatment plant, ensuring a safe and environmentally sound solution.
We’ve seen a surge in homeowners choosing to replace their old septic tanks with modern sewage treatment plants — and for good reason. With UK regulations tightening, many older systems no longer meet legal standards, putting homeowners at risk of fines or enforcement action. Upgrading to a Tricel-certified treatment plant doesn’t just keep you compliant — it protects your property value with a Building Regulations Completion Certificate that reassures buyers and prevents last-minute price drops. Beyond compliance, you’ll enjoy the peace of mind that comes with a system that runs silently, odor-free, and leak-free — no more worrying about unpleasant smells or messy failures. While the initial investment may be higher than a basic septic tank, the long-term savings on maintenance, water usage, and potential penalties make it a smart financial move. And perhaps most importantly, you’re future-proofing your home: whether you’re planning renovations or simply want to avoid disruption down the line, a modern treatment plant ensures you’re ready for whatever comes next. This isn’t just an upgrade — it’s a lasting investment in your home’s safety, value, and sustainability.
At the heart of our approach is simplicity and clarity. Here’s how we work to ensure your sewage treatment plant installation is seamless and stress-free:
At the heart of our approach is simplicity and clarity. Here’s how we work to ensure your sewage treatment plant installation is seamless and stress-free:
Explore Our Latest Sewage Treatment Plant Installations for Inspiration. We Guarantee Quality Workmanship and Attention to Detail
Septic systems are essential for managing wastewater, especially in areas not connected to centralized sewer systems. They offer several significant benefits for homeowners and communities. Here’s why septic systems might be the right choice for you:
brilliant service received from Chris Johnson and his team from the start to the end ,very tidey ,punctual, and he did a grand job extending the opening of the open plan lounge into the garden and installing 5 Bifold doors which involve a lot of work and structural engineering work ,he did all that with a nice smile reflecting that he is enjoying his handy work ,highly recommended ,big thank you Chris.