For years Delta County has allowed people to dump tires for free at its Adobe Buttes Landfill – a policy that they are now re-examining. Old tires are not popular at landfills. They take up a lot of space, they can trap methane gases and become housing for rodents. Burning tires pollute air, soil and water. So why has Delta County agreed to take them for free, no questions asked? Other counties either charge or refuse to take them into their landfills.