This introductory note does not form part of these standard rules.
When referred to in an environmental permit, these rules will allow the operator to discharge domestic sewage with a maximum daily volume between 5 and 20 cubic metres per day to inland freshwaters, coastal waters or relevant territorial waters (as defined in Section 104 of the Water Resources Act 1991).
The sewage must be domestic sewage containing no trade effluent (as defined in Section 221 of the Water Resources Act 1991) and it must be treated by a secondary treatment plant.
The plant must be designed and constructed according to BS 12566; sized in accordance with ‘Flows and Loads 3’ and managed, operated and maintained in accordance with the manufacturer’s recommendations.
The discharge must only be made to a watercourse that normally contains water throughout the year.
The discharge must not be made into ponds or lakes or freshwater within 1 kilometre upstream from an identified bathing water, a designated shellfish water, European Site, Ramsar site, Site of Special Scientific Interest (SSSI), Local Nature Reserve or any body of water identified as containing a Protected Species or within 100 metres from a local wildlife site.
For a site in tidal water ‘1 kilometre upstream’ means within 1 kilometre by the shortest distance over water in any direction from the nearest boundary of any of these sites. This restriction only applies to conservation sites that are water-based and linked to the receiving water downstream of the discharge point.