One of Welsh Water's convictions involved the Manorbier sewage treatment works in Pembrokeshire. While work to convert it into a pumping station was under way, an interim discharge consent required the effluent to be disinfected with hypochlorite. The plant discharges only 500 metres upstream of a popular bathing beach.
Because of safety concerns over keeping hypochlorite tanks at the construction site, Welsh Water requested relaxation of the disinfection requirement for the winter of 1996/97. This was granted subject to treatment being reinstated by 14 April - in time for the 1997 bathing season.
However, an inspection on 22 April revealed that the dosing equipment had not been reinstated. The Agency prosecuted Welsh Water for breaching the consent conditions contrary to section 85(6) of the Water Resources Act 1991. The company pleaded guilty before Tenby magistrates on 17 February and was fined £5,000 with costs of £940.
Welsh Water appeared before Ammanford magistrates the following day to answer two charges relating to an overflow of sewers at Llandeilo, Carmarthenshire, in April 1997. It pleaded guilty to causing polluting matter to enter controlled waters contrary to section 85(1) of the 1991 Act, and to discharging sewage in breach of consent conditions contrary to section 85(6).
The court heard that a storm overflow was discharging during dry weather because a sewer was blocked with rags and silt. Welsh Water was fined £1,500 for each offence with £440 costs.