I had so much trouble trying to find a place to take them that I just started to cut them open and dispose of them myself. According to the EPA, if the oil-filter is hot-drained and dismantled, it is exempt from the hazardous waste regulation. Wal-Mart used to hassle me about recycling oil filters even though on earth911.org it said they took up to 5 filters a visit, the guy that worked at the counter in the back would tell me it was for the service shop only. I never had a problem until I had that specific person wait on me, and just decided to take my business elsewhere. Haven't been back to Wal-Mart since.