Case Study Northumbrian Water (NWL) is part of the Northumbrian Water Group and supplies water and sewerage services to 2.7 million people in the north east of England, covering an area of 1488 miles. Their estate includes 44 impounding reservoirs, 57 water treatment works, 344 water pumping stations, 418 sewage treatment works and 765 sewage pumping stations. In addition to this, there are more than 25,600km of water mains and almost 30

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