<p>AROUND one million consumers in the Klang Valley, who were affected by an unscheduled water supply cut last Friday, will face further dry taps as diesel pollution in Sg Selangor forced the shutdown of four water treatment plants tonight.</p> <p>Syarikat Bekalan Air Selangor Sdn Bhd (Syabas) customer relations and communication department head Abdul Raof Ahmad said the Sg Selangor Water Treatment Plant (SSP) and the Rantau Panjang Water Treatment Plant was shut down after diesel was detected.</p>