If your printer’s toner or ink cartridge is completely empty, it can be put in the trash according to the City of Seattle’s web site. Otherwise, you should recycle it using any of the following methods.
Many office supply stores like OfficeMax, OfficeDepot and Staples typically offer recycling services. Some of them will give you a small store credit if you’ve signed up for their “rewards program.” For example, Staples lets you recycle up to 10 cartridges per user per month and will give you $2 in Staples Rewards.
Check with the store where you purchased the cartridge. Many offer refill and recycle services, including BestBuy and Cartridge World. Both have stores in the greater Seattle area.
Look at the instructions in the box of your new laser or ink jet cartridge to find out how to recycle your old one. Many manufacturers will provide instructions, packaging materials and free postage if you wish to recycle your old cartridge, which is then refilled and used again.
Use the Earth911 web site to find an organization near you that will recycle printer cartridges.