The Water Industry Act 1991 defines trade effluent as “any liquid, either with or without particles of matter in suspension in the liquid, which is wholly or partly produced in the course of any trade or industry carried on at a trade premises.”
Anything that isn’t domestic sewage (toilet, bath or hand wash waste) or uncontaminated surface water and roof drainage (rainwater) is classified as trade effluent. It’s essential that we’re made fully aware of any trade effluent produced at commercial or business premises, so that we’re able to treat it safely. This includes any wastewater derived from a production process or from washing down or cooling activities.
Wastewater discharges from hotels, pubs, restaurants, takeaways and caravan parks are not classed as trade effluent. They are, however, regulated under Section 111 of the Water Industry Act 1991. Premises found to be discharging fats, oils, greases and food scraps into the sewer, which then cause blockages or compromise the safe operation of our assets, can be prosecuted.
The consent to discharge trade effluent will be issued in the name of your business, at the address of your trade premises, and only permits discharge of the effluent specified. All of the conditions and limits stated in your consent to discharge are legally binding. Please make sure that you read your consent document carefully and store it in a safe place. The consent contains various limits. Trade effluent discharges containing any substance not previously declared on the Trade Effluent Notice are illegal.
You must therefore give us notice, in writing, of the following:
We are required to keep a register of trade effluent consents and associated documents, to which the public must be given access. The register is currently held at our Cardiff offices – IWNL, Driscoll 2, Ellen Street, Cardiff, CF10 4BP.
Trade Effluent consents normally require equipment to be installed that will measure the flow. If you’re discharging this effluent into the sewer system, you are responsible for installing and maintaining that equipment.
The consent to discharge trade effluent will be issued in the name of your business, at the address of your trade premises, and only permits discharge of the effluent specified. IWNL operate as a wholesaler, so if you require a trade effluent consent within our licence area this must be obtained from IWNL, not the incumbent water company. Please note that you will need to speak to your appointed Retailer if you have any questions about the application form, you will also need to submit the completed form through your Retailer. Please note that any forms without Retailer details will be returned.
All trade effluent applications or requests to change existing trade effluent discharges must be made using a standard document, depending on your circumstances this will either be a G/02 or G/03 form. Please see below for the difference between the two application forms and links to them. In addition to the completed G/02 or G/03 form, we also require a comprehensive plan of your site drainage system showing the route taken by the trade effluent discharge to the public sewer.
Once we’ve received your completed form, we will either grant or refuse consent within two months.
A copy of our G/02 Form can be downloaded here.
A copy of our G/03 Form can be downloaded here.