Water Supply Systems System Water origin Areas served Water treatment Awatere (including Seddon) Black Birch Stream Lower Awatere Valley including Seddon MIOX plant generating and injecting chlorine Blenheim Wells Blenheim township and Marlborough Ridge UV disinfection followed by pH correction Havelock Well Havelock township Chlorination Picton Wells Picton and Waikawa Chlorination and pH correction Picton Open catchment (Essons Valley) Picton and Waikawa Filtration, chlorination and pH correction Renwick Wells Renwick township Chlorination Riverlands Well Riverlands Industrial Estate None Wairau Valley Well Wairau township Chlorination Water supply pressure information: Notice_to_Plumbers.pdf (PDF, 102.3KB)