Metro Manila
Quezon City, Manila, Makati, Malabon, Navotas, Muntinlupa, Caloocan, Pasay, Paranaque, Las Pinas, Valenzuela, Marikina, Mandaluyong, Pasig, Pateros, San Juan, Taguig

Cavite Province
Imus, Bacoor, Kawit, Noveleta, Cavite City & Rosario

Rizal Province:
Angono, Antipolo, Baras, Binangonan, Cainta, Cardona, Jala-jala, Morong, Pililia, Rodriguez, San Mateo, Tanay, Taytay & Teresa

Bulacan Bulk Water Supply (through the water districts)