Exhibit A

to

Annual Report Concerning Foreign Utility Companies

on

Form U-33-S for the Fiscal Year ended
December 31, 2003

Filed by

SEMPRA ENERGY

The following organizational chart shows the relationship of Sempra Energy and its system public-utility companies to each foreign utility company:

ORGANIZATIONAL CHART
OF SEMPRA ENERGY UTILITIY COMPANIES
(As of December 31, 2003)

SEMPRA Energy

Enova Corporation

San Diego Gas & Electric Company*

Frontier Utilities of North Carolina, Inc.

Frontier Energy, LLC*

Pacific Enterprises

Southern California Gas Company*

Penobscot Natural Gas Company, Inc.

Bangor Gas Company LLC*

Sempra Energy Global Enterprises

Sempra Energy International

DGN de La Laguna-Durango, S. de R.L. de C.V. (0.31%)*

Pacific Enterprises International

Enova International

Sempra Energy Mexico, S.A. de C.V. (99.999%)

DGN de Chihuahua, S. de R.L. de C.V. (69.11%)*

DGN de La Laguna-Durango, S. de R.L. de C.V. (99.69%)*

Distribuidora de Gas Natural de Mexicali, S. de R.L. de C.V. (78.52%)*

Sempra Energy International (España) S.L.

Energy Business International S.R.L. (0.001%)

Luz del Sur S.A.A. (3.83%) *

Ontario Quinta, S.R.L. (0.00003%)

Luz del Sur S.A.A. (61.16%)*

Sempra Energy International Holdings B.V.

Sempra Energy International Canada Ltd.

Pacific Enterprises International Canada Ltd.

DGN de Chihuahua, S. de R.L. de C.V. (30.89%)*

Distribuidora de Gas Natural de Mexicali, S. de R.L. de C.V. (21.48%)*

Sempra Energy International Asociación en Participación (25%)

Chilquinta Energía S.A. (49.993%)*

Inversiones Sempra Chile Holdco Ltda.. (99.9999%)

Tecnored, Ltda. (50%)

Energy Business International S.R.L. (0.01%)

Luz del Sur S.A.A. (3.83%)*

Peruvian Opportunity Company S.A.C. (50%)

Energy Business International S.R.L. (99.966%)

Luz del Sur S.A.A. (3.83%) *

Luz del Sur S.A.A. (22.89%)*

Ontario Quinta S.R.L. (99.9952%)

Luz del Sur S.A.A. (61.16%)*

Sempra Energy International Chile Holdings I B.V (99.892%)

Sempra Energy (Denmark-1) ApS (100%)

Sodigas Pampeana S.A. (43.09%)

Camuzzi Gas Pampeana S.A. (86.09%) *

Sodigas Sur S.A. (43.09%)

Camuzzi Gas del Sur S.A. (90%) *

Sempra Energy International Asociación en Participación (75%)

Chilquinta Energía S.A. (49.993%)*

Inversiones Sempra Chile Holdco Ltda.. (99.9999%)

Tecnored, Ltda. (50%)

Energy Business International S.R.L. (0.01%)

Luz del Sur S.A.A. (3.83%)*

Peruvian Opportunity Company S.A.C. (50%)

Energy Business International S.R.L. (99.966%)

Luz del Sur S.A.A. (3.83%) *

Luz del Sur S.A.A. (22.89%)*

Ontario Quinta S.R.L. (99.9952%)

Luz del Sur S.A.A. (61.16%)*

* The utility companies are noted with an asterisk.