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JDC supply and install a wide range of Sewage Treatment Plants including Premier Tech/ Solido, Klargester, WPL (Diamond & HiPAF), Marsh, Tricel, Kingspan that conform to EN 12566-3 or EN 12255 certified sewage treatment systems. We install STP’s for both single and multiple dwellings, campsites and other applications such as business parks and industrial estates. We are based in Chichester and operate throughout the Southern Counties.

We also undertake servicing and repairs for all makes of sewage treatment plants across Hampshire Chichester and Sussex.

Sewage Treatment. Single dwelling WPL DM
Sewage Treatment. Filling HiPaf Plant wi
Sewage Treatment. WPL HiPAF and clarific


JDC environmental Contractors Limited replace old and leaking septic tanks. Septic tanks are rapidly being replaced with the more ‘environmentally friendly’ sewage treatment plants (STP’s). Septic tanks do little to remove nitrogen (Ammoniacal-Nitrogen measured in mg/l) from the final discharge effluent which ends up in the environment. On January 1st 2020 all septic tanks discharging into surface waters (ditches, streams etc) were required to be replaced with STP’s, or have drainage fields installed.

Septic tanks, even the ones discharging to ground (drainage fields) will eventually be replaced with sewage treatment plants across the UK. Our inland waterways and coastal marine environments are becoming polluted with Nitrates and phosphates and correct sewage treatment can help to mitigate this problem.

Anyone buying a new home with an off-mains sewage system should have a foul drainage survey completed (JDC environmental Contractors Ltd undertake Foul Drainage Surveys for both Vendors & Buyers) before signing the contract and we advise that all properties with septic tanks should be up-graded with a sewage treatment plant, usually at the expense of the vendor.


Please CONTACT John or Jamie at JDC environmental Contractors Ltd for advice or to book a drainage survey.


The Environment Agency (EA) and local Authorities mostly require that sewage discharge is of a higher standard than a septic tank can produce.


The EA set consent levels for discharge depending on the sensitivity of the environment that is being discharged into, but for most domestic situations a sewage treatment plant can be installed under the General Binding Rules and therefore does not require a bespoke permit.

For expert advice, guidance and a competitive quote for your project, please visit our CONTACTS page and get in touch.

Holiday Parks


One of the areas we have gained great experience and knowledge is in supplying and installing mid-range Sewage Treatment Plants and Pumping Stations for Caravan Sites and Holiday Parks across the South of the UK.

If you'd like to chat or quote about this particular area of our expertise, please drop us a line.



We always engage with Building Control and have the installation signed off on completion (this is a requirement which many installers of septic tanks and sewage treatment plants do not do!)

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We are registered and experienced installers of Premier Tech Solido®, Klargester Clear Water®, WPL and Marsh products and drainage solutions, as well as many others.

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