Warning Letters

These letters are served as a warning to the company that any further repeat events of this nature could result in further sanctions, including enforcement or prosecution.

Date of incident Letter date Company and issue
July and December 2017 29 August 2018 Severn Trent Water received two warning letters following investigations into two incidents at service reservoirs operated by the company. The first incident was associated with the detection of faecal contamination in Mapperley service reservoir, Nottingham in July 2017, following an over-filling event. The second incident was associated with the detection of faecal contamination in High Service Reservoir, Derby in December 2017 following a period of heavy rain when the roof membrane was defective. The Inspectorate subsequently identified evidence of livestock faeces on the roof of the reservoir. The Inspectorate concluded that the company was negligent in not preventing both these events and, in each case, failed to take adequate steps to protect public health. (2017/6164 and 2017/6388).
Various 2017 15 November 2017 Northumbrian Water received two warning letters after the Inspectorate identified use of unapproved produces in the treatment process at Murton works, during a technical audit which was undertaken in response to a series of events at Murton where water of low pH was supplied (2017/5978;6038;6084). The second warning letter was issued because the company provided incorrect information in its final report on one of these events.
26 September 2016 16 November 2017 United Utilities received a warning letter following investigation of an incident where contamination from a stockpile of paper pulp entered the Thirlmere (raw water) aqueduct.  Organic chemicals in the wood pulp caused an unacceptable taste and odour in water supplied to consumers from Lostock treatment works (2016/5764).
5 March 2016 13 October 2017 United Utilities received a warning letter following the detection of Cryptosporidium in water supplied from Woodgate Hill treatment works whilst roof repairs were being carried out on the final contact tank (2016/5456).
20 January 2016 22 September 2017 South East Water was issued with a warning letter  following investigation of an incident where consumers reported an unacceptable taste and odour in their tap water supply. The issue was caused by stagnant water from an abandoned asset at Groombridge treatment works entering the supply (2016/5407).
20 September 2016 7 April 2017 SES Water received a warning letter following the investigation of a mains misconnection to a private supply in Worcester Park (2016/5760) in which unwholesome water was supplied.
4 January 2016 12 December 2016 Wessex Water received a warning letter following investigation of the Chard incident (2016/5379) in which water unfit and unwholesome was supplied.
9 May 2014 12 December 2016 Severn Trent Water received a warning letter following the investigation of the Cleeve incident (2014/4451) in which water unfit and unwholesome was supplied.
24&25 December 2013 6 December 2016 Wessex Water received a warning letter following the investigation of the Ivyfield incident (2014/4374) where the company failed to adequately disinfect water leaving its Ivyfield works.
26 January 2013 12 July 2013 Cambridge Water was issued with a warning letter following the company’s failure to notify the Inspectorate of a reportable event  - Oakington 450mm burst main (2013/3889).

 

 

Page reviewed: 30 August 2018
Page modified: 30 August 2018

Drinking Water Inspectorate