Guernsey Water Annual Report 2016

Guernsey Water 2016 Annual Report PROTECT OUR ENVIRONMENT 14 water.gg/ annualreport2016 PROTECT OUR ENVIRONMENT Reduce our waste Work in partnership to improve bathing water quality Water quality is protected from source to sea and our environmental impact is carefully managed 4 Performance Highlights Our priority was to ensure our discharges do not have an unacceptable impact on the environment - be that the marine environment or the atmosphere through odorous gases from our wastewater systems. In 2016 our environmental regulator issued a draft FEPA 4 licence for operations at our Belle Greve Wastewater Centre. In the near future we expect permits to be issued for all our wastewater discharges; once in place we will publish details of our compliance with them. Bathing water compliance is an ongoing focus for us even though our bathing water management initiative shows that, in most cases, overflows from our wastewater system are not the primary risk to bathing water quality. We have installed monitoring equipment on all our combined sewer overflows (see Effective Drainage) to assess this risk. However, although data is being collected, the performance of some of these monitors is under review. Alternative options will be explored in 2017 if these monitors cannot provide the reliability we need. Capital Investment Harbour St Sampson’s Pumping Station Refurbishment Phase one of this project, to provide an alternative rising main capable of passing increased flows from the pumping station, was completed following difficulties with the jointing of the new pipe. Commissioning of this newmain was ongoing at the end of the year. The increase in capacity will reduce spill volumes from our North harbour side and South harbour side combined sewer overflows helping to improve bathing water compliance particularly at Bordeaux. CASE STUDY Bathing Water Quality We carried out a hydrodynamic study of our coastline to understand and predict the quality of the water. This looked at the impact our assets, together with contamination from streams and animals, have on bathing water. It particularly looked at the east coast and Pembroke and Ladies Bays where compliance has been poor. Findings suggest streams and seagulls are a greater risk to compliance than our assets (e.g. CSOs). 66% REDUCTION IN OVERDUE OIL STORAGE IMPROVEMENTS

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