From CBC PEI:

The mayor of Souris says disposable wipes are causing problems for Souris's sewage system and David MacDonald says it's costing the town thousands of dollars in repairs.

MacDonald said residents should be throwing the wipes in the garbage, and not flushing them down the toilet.

The town has sent out a notice to residents saying "Flushing that 'flushable' wipe?? Not so fast."

For more see  Souris tells residents not to flush disposable wipes