Exhibit 12.2 Statements Re: Computation of Ratios

POTOMAC ELECTRIC POWER COMPANY

	For the Year Ended December 31,
	2010		2009		2008		2007		2006
	(millions of dollars)
Net income	$	108	$	106	$	116	$	125	$	85
Income tax expense (a)		37		76		64		62		58
Fixed charges:
Interest on long-term debt, amortization of discount, premium and expense		101		103		95		86		77
Other interest		10		11		11		12		13
Total fixed charges		111		114		106		98		90
Income before income tax expense and fixed charges	$	256	$	296	$	286	$	285	$	233
Ratio of earnings to fixed charges		2.31		2.60		2.70		2.91		2.59
Total fixed charges, shown above		111		114		106		98		90
Preferred dividend requirements, adjusted to a pre-tax amount		—		—		—		—		2
Total fixed charges and preferred dividends	$	111	$	114	$	106	$	98	$	92
Ratio of earnings to fixed charges and preferred dividends		2.31		2.60		2.70		2.91		2.54

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