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0345 600 3 600

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0345 600 4 600

Monday to Friday, 8am to 6pm (emergencies only at other times)

operational.enquiries@wessexwater.co.uk
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  • Changes to trade effluent in 2017

    Trade effluent is wastewater that businesses discharge to the public sewer.

    It usually requires consent as it can impact the environment, our sewage treatment processes and infrastructure. Consent can only be given by us for discharges in our region. 

    From 1 April 2017 traders will need to consult their water and sewerage retailer to start this process as we will no longer provide retail services to traders under Open Water.

    We strongly recommend that if you are planning a new discharge of trade effluent and you do not yet have a retailer, you select and appoint one as soon as possible.

    Trade effluent does not include domestic discharges, such as toilet flushing or hand washing. It does include wastewater from any trade activity such as commercial laundries, food preparation, manufacturing, metal plating, etc.

  • Finding a retailer

    To see the full list of retailers, visit the Open Water website

    Businesses required to have trade effluent consent

    Some businesses don't require trade effluent consent. These include: 

    • schools
    • cinemas
    • restaurants
    • hotels
    • nursing homes.

    To find out if your business needs one, contact your water and sewerage retailer. 

    All other trade effluent discharges require consent. It is illegal to discharge trade effluent to sewer without consent.

    From 1 April 2017 you will need to consult your water and sewerage retailer to begin a consent application.

    Obtaining trade effluent consent

    From 1 April 2017 you will need to speak to your water and sewerage retailer to start a consent application. You will need to complete form G/02 available from your retailer. Please note that your retailer may set an application fee.

    We are required by law to determine the consent within two months.  Sometimes it can take longer - especially if we need to build new infrastructure or treatment processes.

    If you're thinking of a new or substantial change in the strength or volume of your discharge, contact us or your water and sewerage retailer as soon as possible.

    Most water and sewerage retailers will apply a consent application charge. When your consent is issued, you'll need to pay treatment charges based on the volume and strength of your discharge. Find out more about our treatment charges .

    Discharges lasting a short amount of time

    You will need to apply for a temporary trade effluent discharge. Discharges that last for less than six months will not require the services of your water and sewerage retailer. You can complete the

    You can complete the  application for a temporary discharge and submit it directly to us.

    Trade effluent bill disputes

    Please contact your water and sewerage retailer if you don't agree with your bill, they will be happy to help.

    Information included within trade effluent consent

    Businesses that discharge sewage to the public sewer may need a trade effluent consent. This is because the discharge can impact the environment, our sewage treatment processes and infrastructure. The consent may include:

    • limits on the daily volume and flow rate
    • limits on the concentration of solids, organic matter or harmful constituents
    • limits on physical parameters such as temperature or particle size
    • requirements for things like flow measurement, sampling access and monitoring equipment.

    It will also specify the sampling point, discharge to sewer location and anything else that's relevant to the discharge. From 1 April 2017 you will need to consult your water and sewerage retailer to initiate a consent application using form G/02 available from the retailer's website.

    Changes to trade effluent discharge

    Contact your water and sewerage retailer soon as possible if there's a significant change (e.g. more than 10%) in the strength, composition or volume of your discharge. A change could impact the environment, our sewage treatment process or infrastructure.

    If this change is an emergency, call us immediately on 0345 600 4 600 (24 hours).

    Trade effluent consent conditions

    If you can't meet your consent conditions we'll discuss this with you as soon as we're notified or pick up a poor water quality sample. Persistent non-compliance can lead to cost recovery, stronger enforcement action and eventual prosecution for a breach of the Water Industry Act 1991.

    Moving premises

    When moving premises your old consent becomes void and we'll issue you with a new one, but you must re-apply through your retailer using form G/02.

    Factories

    If you're building a factory please contact our developer services team for a new connection to the public sewer. You will also need to submit to your water and sewerage retailer a completed trade effluent application form G/02 available from the retailer's website.

    It may take some time to check we have sufficient capacity so contact us as soon as possible. There is no charge for this consultation.

    Chemical spills

    If you've had a chemical spill call us immediately on 0345 400 6 400 (24 hours a day) as soon as you're aware of it. Try to contain it as best as you can and prevent further discharge. If chemicals spill to surface water you will need to contact the Environment Agency .

    Broken down trade effluent treatment processes

    If your trade effluent treatment process breaks down call us immediately on 0345 600 4 600 (24 hours a day) and your water and sewerage retailer as soon as possible. Untreated trade effluent discharge can impact the environment, our sewage treatment process and infrastructure. If you inform us about it, we may be able to take steps to reduce any risks.

    Reducing trade effluent charges

    Contact your water and sewerage retailer if you'd like to try to reduce your charges. They may be able to arrange to carry out a water check to see if your usage can be reduced. They will also help you identify sources of strong wastewater and calculate the effect of any process changes you could make.

    Car washes

    If you run a car wash you need to apply for trade effluent consent as sewers and surface water need protecting from the oil and grit your car wash generates. You should consult your water and sewerage retailer for guidance on this and submit a completed G/02 application form to them.

    Washing bins, cleaning paintbrushes and rinsing chemical bottles in a domestic property

    Domestic activity is excluded from trade effluent legislation, even if it is undertaken by a contractor, so you do not need to apply for a trade effluent consent.

    Swimming pools

    We don't routinely issue trade effluent consents for swimming pool drainage. However you'll still need to contact us beforehand as the flows could flood the sewer if you don't follow our advice.

    Portable toilets

    Regarding trade effluent consent for portable toilets:

    • If it's on a domestic property and drained to the householder's sewers, you don't need a consent.
    • If it's emptied by tanker, the tanker company will need to take it to a licensed treatment centre.

    Mobile businesses

    If you run a mobile business that provides services including bin washing, vehicle valeting, central heating drainage, steam cleaning etc. then you need to apply for trade effluent consent. Wastewater should never be disposed to a highway drain or surface water gulley.

    Any continuous operation will require trade effluent consent and you should submit a completed G/02 form to your retailer.

    Temporary or one-off discharges (less than six months) will require authorisation by us so you should complete the application for a temporary discharge on our website and submit it to us.

    Water and sewerage retailers and trade effluent

    All trade effluent customers from 1 April 2017 will need to appoint a water and sewerage retailer (unless one is already appointed). Wessex Water will charge retailers for trade effluent discharges to foul sewers then bills to traders will be compiled and sent by your retailer.

    From 1 April 2017, consent applications (form G/02) and general enquiries (form G/01) should be submitted to Wessex Water via your retailer.

    Your water and sewerage retailer will deal with all enquiries relating to:

    • your trade effluent bill
    • faulty trade effluent meters
    • advising trade effluent flow information
    • general trade effluent treatment advice
    • consent applications to discharge trade effluent, although we would also like to be involved in early pre-application discussions.

    Emergency contact

    Contact us immediately on 0345 600 4 600 (24 hours) in the event of a chemical spill, treatment plant malfunction or other trade effluent-related emergency at your premises. This requirement is part of your trade effluent consent conditions. We will notify your water and sewerage retailer as soon as possible if you do contact us for this reason.

    Any other query should be submitted to your retailer on form G/01 which will be available through the retailer.

    Trade effluent discharge meters

    If you plan to install, routinely replace or upgrade a trade effluent discharge meter, please let us know using: trade.effluent@wessexwater.co.uk

    If you need to repair or replace a faulty trade effluent discharge meter, please contact your retailer and ask them to submit a B01 form to us on your behalf.

    Please include as much detail as you can in either case.

    Ceasing of trade effluent discharge

    If you stop your trade effluent discharge please advise your water and sewerage retailer. They will contact us and we will terminate your trade effluent consent.
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