.s . state and non- u.s . jurisdictions . with few exceptions , the company is no longer subject to state and foreign income tax examinations by tax authorities for years before 2014 . the irs has completed examinations of the company 2019s u.s . federal income tax returns ( ecolab and nalco ) through 2014 . the company 2019s u.s . federal income tax return for the years 2015 and 2016 are currently under audit . in addition to the u.s . federal examination , there is ongoing audit activity in several u.s