Exhibit 12

SOUTHWEST WATER COMPANY AND SUBSIDIARIES
COMPUTATION OF EARNINGS TO FIXED CHARGES RATIOS

	Years Ended December 31,(1)
(In thousands, except for ratio data)	2006			2005			2004			2003			2002
Earnings:
Income (loss) from continuing operations before
income taxes	$	14,350		$	11,362		$	7,322		$	10,989		$	9,258
Add: Fixed charges	11,690			9,320			7,720			6,606			5,648
Less: Interest capitalized	(630		)	(689		)	(501		)	(535		)	(194		)
Total earnings	$	25,410		$	19,993		$	14,541		$	17,060		$	14,712
Fixed Charges:
Interest expense, including amortization of
debt discounts and issuance costs	$	8,372		$	7,245		$	4,988		$	4,181		$	4,089
Interest capitalized	630			689			501			535			194
Interest component of rentals(1)	2,688			1,386			2,231			1,890			1,365
Total fixed charges	$	11,690		$	9,320		$	7,720		$	6,606		$	5,648
Ratio of Earnings to Fixed Charges:
Ratio	2.17		x	2.15		x	1.88		x	2.58		x	2.60		x
Deficiency	$	—		$	—		$	—		$	—		$	—

(1)Reflects one-third of rental expense under operating leases considered to represent interest costs.