<TABLE> <S> <C>
<PAGE>
<ARTICLE> UT
<LEGEND>
This schedule contains summary financial information extracted from the AGL
Resources Inc. Form 10-K Annual Report for the Fiscal Year ended September 20,
2000, and is qualified in its entirety by reference to such financial
statements.
</LEGEND>
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> SEP-30-2000
<PERIOD-START> OCT-01-1999
<PERIOD-END> SEP-30-2000
<BOOK-VALUE> PER-BOOK
<TOTAL-NET-UTILITY-PLANT> 1,580
<OTHER-PROPERTY-AND-INVEST> 58
<TOTAL-CURRENT-ASSETS> 99
<TOTAL-DEFERRED-CHARGES> 283
<OTHER-ASSETS> 0
<TOTAL-ASSETS> 2,020
<COMMON> 223
<CAPITAL-SURPLUS-PAID-IN> 200
<RETAINED-EARNINGS> 198
<TOTAL-COMMON-STOCKHOLDERS-EQ> 621
74
0
<LONG-TERM-DEBT-NET> 590
<SHORT-TERM-NOTES> 141
<LONG-TERM-NOTES-PAYABLE> 0
<COMMERCIAL-PAPER-OBLIGATIONS> 0
<LONG-TERM-DEBT-CURRENT-PORT> 20
0
<CAPITAL-LEASE-OBLIGATIONS> 1
<LEASES-CURRENT> 0
<OTHER-ITEMS-CAPITAL-AND-LIAB> 573
<TOT-CAPITALIZATION-AND-LIAB> 2,020
<GROSS-OPERATING-REVENUE> 607
<INCOME-TAX-EXPENSE> 37
<OTHER-OPERATING-EXPENSES> 358
<TOTAL-OPERATING-EXPENSES> 507
<OPERATING-INCOME-LOSS> 100
<OTHER-INCOME-NET> 29
<INCOME-BEFORE-INTEREST-EXPEN> 129
<TOTAL-INTEREST-EXPENSE> 52
<NET-INCOME> 77
6
<EARNINGS-AVAILABLE-FOR-COMM> 71
<COMMON-STOCK-DIVIDENDS> 60
<TOTAL-INTEREST-ON-BONDS> 47
<CASH-FLOW-OPERATIONS> 152
<EPS-BASIC> 1.29
<EPS-DILUTED> 1.29
</TABLE>