The change to chloramination will conclude the use of free chlorine for secondary disinfection that was implemented by UWSS on April 27th, 2014. The 6 month long temporary change to free chlorine was conducted to facilitate long term maintenance program on the system to control bacterial re-growth within the distribution system. To find further information please read the UWSS’s New Release and Frequently Asked Questions. To speak to UWSS call 519-326-1668 or an OCWA Operator at 519-326-4447.