Figures from Island Waste Management Corporation show the amount of compost collected on PEI dropped 24 per cent from 2009 to 2012.
That's a decrease of almost 6,000 tonnes over that period. During that same time period, the amount of waste going into black bins on P.E.I., went up by eight per cent.
IWMC CEO Gerry Moore said a big part of this change is due to some key industrial players that are no longer delivering compost. That includes Cavendish Farms, which now uses its organic waste to make gas.
Moore also said homeowners may be letting their sorting slip a little.
"When we compare it year over year, there is so many variables it is hard to determine whether the participation rate overall is going up or going down," said Moore.
"We still have people that do it very well, and sometimes we have educational issues with new people coming into the province and it takes them awhile to get up to speed."
Moore said IWMC spends $150,000 a year on education and promotion. Any increase in that number would mean higher costs for Waste Watch customers.
For mobile device users: Are you still careful about sorting your compost from your waste?