QUESTION: I'm starting to get a collection of burnt-out compact fluorescent light bulbs. How or where do I dispose of them? Don't they contain a small amount of mercury?

ANSWER: Compact fluorescent light bulbs, CFLs, do contain a small amount of lead and mercury and, therefore, need to be disposed of properly.

Bev Wagner, Dubuque Metropolitan Area Solid Waste Agency education and communication coordinator, recommended individuals take their burnt-out CFLs to the Regional Collection Center for proper recycling and disposal.

Unlike individuals, businesses are required by law to recycle all CFLs through private companies or the center.

Dubuque and Delaware county residents can recycle CFLs free of charge. However, they must make an appointment at the center, located at the Dubuque Metro Landfill on U.S. 20 near the west edge of Dubuque. For an appointment, call 563-589-1720.

"Businesses that sell compact fluorescent lamps are encouraged to offer recycling collection of these materials," Wagner said. "This would support the sustainability efforts in the Dubuque area and model product stewardship practices."

Paul Schultz, agency supervisor, said although CFLs contain mercury, a mercury thermometer contains 100 times more mercury.

"There is a significant barrier or ignorance regarding purchasing CFLs due to the mercury component. Mercury does not escape from an intact bulb or light," Schultz said.

Although the mercury content in CFLs has decreased, mercury is considered a serious neurotoxin.

Schultz suggested setting aside CFLs in a safe place until people can make a consolidated trip for proper recycling.

Have a question for the TH? E-mail City Editor Ken Brown at kbrown@wcinet.com. Watch for the answer to your question throughout the week in the TH.