E.Coli Proof Drinking Water – Waverly


South Taranaki District Council


$1.5 Million

Project type:
Water Treatment

Plant Capacity:

Customer Need

Due to E. Coli events in the groundwater supplying the Waverley community, the South Taranaki District Council required a new water treatment plant to prevent further issuance of boil water notices before drinking.

The Waverley community is supplied with water from three bores. The bores vary in age, condition, and water composition. The bore water key components requiring treatment are iron, manganese, ammonia, and turbidity. During winter, the town generally only requires a single bore to supply the town, which allows it to utilise the newer bore to minimise the likelihood of E. coli contamination. However, during summer all three bores can be in operation due to high demand.

What We Did

FILTEC was awarded the project as the head contractor to design and build the water treatment plant, spanning from design to commissioning and hand over. The design consisted of a greensand filtration plant to remove the iron and manganese from the bore water, a UV reactor to provide protozoa inactivation, and a final dose of chlorine to provide residual chlorine, and bacterial and viral removal as per New Zealand Drinking Water Standards. Additionally, fluoride is dosed for dental protection. The water treatment plant has been designed to process 50 m3/h of bore water.

The Results

Despite the inconvenience and interruption COVID-19, the water treatment plant was taken from concept to a fully functioning water treatment plant in just over a year, with water quality exceeding the New Zealand drinking water standards. FILTEC’s service team continues to support the customer with consumables and maintains equipment to ensure the customer’s plant continues to run smoothly and uninterrupted.