Ofwat's chief executive, David Black, says water companies need to take ownership of their failures, and address root causes of issues. <br /> <br />His comments come as the regulator ordered firms to pay £157.6 million back to customers after missing key targets on pollution, leaks, supply interruptions and falling customer satisfaction. Report by Alibhaiz. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn
