Exhibit 12.1

California Water Service Group

Computation of Ratios of Earnings to Fixed Charges

(In thousands except ratios)

	Years Ended December 31,
	2017				2016				2015				2014				2013
Earnings:
Income before income tax expense	$	100,544			$	75,491			$	70,307			$	84,710			$	67,723
Fixed charges interest expense	36,570				33,748				29,467				28,765				31,179
Allowance for funds used during construction	(6,110		)		(2,965		)		(1,915		)		(1,535		)		(2,038		)
Total	131,004				106,274				97,859				111,940				96,864
Fixed Charges:
Interest expensed & capitalized, & amortization of capitalized expense related to indebtedness	36,288				33,466				29,185				28,483				30,897
Estimated interest component of rent expense	$	282			$	282			$	282			$	282			$	282
Total	36,570				33,748				29,467				28,765				31,179
Ratio of earnings to fixed charges	3.58				3.15				3.32				3.89				3.11