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CAGAYAN 1 ELECTRIC COOPERATIVE, INC. (CAGELCO 1) Cagayan De Oro Water (CDO Water)
CAGAYAN DE ORO WATER (CDO WATER)
CAGAYAN ELECTRIC POWER AND LIGHT COMPANY, INC. (CEPALCO)
Cagayan2 Electric Coop. (CAGELCO2)
Calamba Institute
Calapan Waterworks Corporation Calasiao Water
Calumpit water District (CWD)
CAMARINES NORTE ELECTRIC COOPERATIVE, INC. (CANORECO)
Camarines Norte Water District
Camarines Sur I Elec Coop, Inc.
CAMARINES SUR II ELECTRIC COOPERATIVE (CASURECO 2)
Camarines Sur III Elec Coop, Inc.
