Clean Ayr and its sister company US-DEF® are sponsors at the 2026 North American DEF Conference, 9/14~9/16 at the Omni in Frisco,

Clean Ayr has added wet hosing to its DEF delivery services. Our drivers now deliver DEF to some of the most complex

Need DEF? Want to get away from high-cost DEF in jugs? Clean Ayr makes it easy. Our new program offers next day

Clean Ayr now offers DEF in full pallets of clean, Grab & Go 2.5 gallon jugs. We have the best price available