Rice Lake is not polluted as others above have mentioned. Prior to trout stocking, the ministry's biologists conduct tests to ensure that water quality is beyond satisfactory. If consumption of these fish is not recommended, there would be public advisory notices posted at the lake.
Regarding poaching problem at Rice Lake, it was discussed via email between MoE, Seymour Conservative Reserve, the hatchery/FFSBC and other angling representatives a few months ago. The authorities are always looking for better solutions. Anglers can assist by always phoning in violations or reporting to the front gate. Like all urban put and take lakes, violations are often more frequent. Because Rice Lake is more secluded, it seems to experience more than other lakes.
As for the fishing, it is not as productive this time of the year due to the warm water temperature. The fishing should improve significantly in October. Good luck.