SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS

12 Months Ended

Dec. 30, 2017

Valuation and Qualifying Accounts [Abstract]

SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS

MUELLER INDUSTRIES, INC.

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

Years Ended December 30, 2017, December 31, 2016, and December 26, 2015

			Additions
(In thousands)	Balance at beginning of year		Charged to costs and expenses		Other additions				Deductions		Balance at end of year
2017
Allowance for doubtful accounts	$	637	$	422	$	(61	)		$	18	$	980
Environmental reserves	$	21,864	$	7,491	$	—			$	1,351	$	28,004
Valuation allowance for deferred tax assets	$	18,681	$	7	$	11,628		(1)	$	—	$	30,316

2016
Allowance for doubtful accounts	$	623	$	160	$	2	$	148	$	637
Environmental reserves	$	21,667	$	894	$	—	$	697	$	21,864
Valuation allowance for deferred tax assets	$	17,650	$	3	$	1,028	$	—	$	18,681

2015
Allowance for doubtful accounts	$	666	$	(130	)	$	201	$	114	$	623
Environmental reserves	$	22,661	$	76		$	—	$	1,070	$	21,667
Valuation allowance for deferred tax assets	$	17,119	$	(5	)	$	536	$	—	$	17,650

⁽¹⁾ The valuation allowance increased by $11.6 million during 2017 to a balance of $30.3 million as of December 30, 2017.  The change to the valuation allowance in 2017 was attributable to the recording of valuation allowances against tax attributes generated in 2017 primarily resulting from the Act and increased interest expense in state tax jurisdictions where the Company has no tax liability.