Barometers Illegal in Garbage, Recycling & Drains Contains Mercury Hazardous Waste If your barometer contains mercury, you can take it to one of our hazardous waste facilities or to the facility listed below: Hazardous Waste Collection Facility 889A Devlin Road, American Canyon | 1-800-984-9661 Friday and Saturday, 9 am – 4 pm City of American Canyon Mercury Elimination ProgramCity of American Canyon Corporation Yard205 Wetlands Edge Road, American Canyon | (707) 647-4550Monday – Friday 8am – 4pmReplacement of fever thermometers, mercury thermostats and disposal of mercury products for residents only. Aneroid vs. Mercury Barometers Aneroid barometers are circular and have a pointer and dial face. These barometers do not typically contain any mercury, even though the unit of measure is inches or millimeters of mercury. For a mercury barometer, the reading is taken from the height of the mercury in a glass column, much like a thermometer. Never Throw Away Mercury Barometers Most antique barometers contain about 4 ounces of mercury that can be released into the environment if disposed of improperly. If your barometer contains mercury, dispose of it with hazardous waste. Ways to Reuse Repair Antique Barometers If you have a broken antique barometer, have it repaired instead of throwing it away. Check out The Barometer Shop, a store specifically dedicated to repairing antique barometers.