Schedule II Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2011

SCHEDULE II [Abstract]

SCHEDULE II

SCHEDULE II

PUBLIC SERVICE CO. OF COLORADO AND SUBSIDIARIES

VALUATION AND QUALIFYING ACCOUNTS

YEARS ENDED DEC. 31, 2011, 2010 AND 2009

(amounts in thousands)

				Additions
	Balance at Jan. 1			Charged to Costs and Expenses			Charged to Other Accounts (a)			Deductions from Reserves (b)			Balance at Dec. 31
Allowance for bad debts:
2011		$	24,054		$	20,371		$	7,423		$	27,150		$	24,698
2010			24,149			21,571			7,192			28,858			24,054
2009			29,195			21,189			14,364			40,599			24,149

(a) Recovery of amounts previously written off.

(b) Principally bad debts written off or transferred.