Wetland facility to improve water qualitypublished at 16:14 Greenwich Mean Time 9 November 2017
Work on a new wetland treatment facility near King's Lynn is to begin later this month.
Anglian Water has been granted planning permission for the site in Ingoldisthorpe, which will treat over 1m litres of water a day from the Ingoldisthorpe sewage treatment works.
The company says the £500,000 project will create one hectare of new wetland, made up of four shallow interconnected ponds, and planted with native chalk wetland species such as iris, sedge, marsh marigold and watercress.
The wetland plants work to naturally clean the water, removing ammonia and phosphate.
Used but treated water from the sewage works will pass through the wetland to be further filtered and cleaned, before it's returned to the environment in the River Ingol.
The water company says the additional and natural filtering process will further improve the quality of water being returned to the river, which is a spring-fed chalk stream.
The wetland site will be constructed, maintained and operated by Norfolk Rivers Trust (NRT).
NRT spokesman Jonah Tosney says a similar wetland system was created at Northrepps near Cromer in 2014, which has led to much improved water quality in the River Mun, as well as increased biodiversity.
The Ingoldisthorpe wetland is expected to be fully established by early summer.