Household chemicals should be used in the manner for which they were intended, so try giving leftovers to a friend or neighbor if you can't use them. Never discard chemicals on the ground! Most residential-type hazardous chemicals, like cleansers, pesticides, herbicides, fertilizers, automotive products, and mercury found in thermostats and thermometers are accepted at the HazChem Center near the Des Moines County Regional Landfill. The HazChem Center manages a Swap Shop where you may be able to obtain products at no charge. For your safety, an appointment is always necessary, so call 319-753-8758. or visit HazChem Center