Exhibit 12.2 Statements Re. Computation of Ratios

POTOMAC ELECTRIC POWER COMPANY

	For the Year Ended December 31,
	2009		2008		2007		2006		2005
	(millions of dollars)
Net income	$	106	$	116	$	125	$	85	$	165
Income tax expense (a)		76		64		62		58		128
Fixed charges:
Interest on long-term debt, amortization of discount, premium and expense		103		95		86		77		83
Other interest		11		11		12		13		14
Preferred dividend requirements of a subsidiary trust		—		—		—		—		—
Total fixed charges		114		106		98		90		97
Income before income tax expense and fixed charges	$	296	$	286	$	285	$	233	$	390
Ratio of earnings to fixed charges		2.60		2.70		2.91		2.59		4.04
Total fixed charges, shown above		114		106		98		90		97
Preferred dividend requirements, adjusted to a pre-tax amount		—		—		—		2		2
Total fixed charges and preferred dividends	$	114	$	106	$	98	$	92	$	99
Ratio of earnings to fixed charges and preferred dividends		2.60		2.70		2.91		2.54		3.94

(a) Concurrent with the adoption of FIN 48 in 2007, amount includes interest on uncertain tax positions.