Some hazardous household wastes are acceptable at landfills if special treatment is followed. Empty hazardous product containers should be rinsed several times before discarding in the trash. (Use the rinse solution in the same manner you were using the chemical solution. Continue safe-use practices.)
Call your local solid waste management company for special information on disposing of hazardous household waste. They can advise you on the disposal methods they prefer. They can also advise you if indeed they will even accept the waste.