Freshwater Classes

Class AA

Public Water Supply Class I. This class is intended primarily for waters having watersheds which are uninhabited and otherwise protected and which require only approved disinfection in order to meet the National Standards for Drinking Water (NSDW) of the Philippines.

Class A

Public Water Supply Class II.  For sources of water supply that will require complete treatment (coagulation, sedimentation, filtration and disinfection) in order to meet the NSDW.

Class B

Recreational Water Class I.  For primary contact recreation such as. bathing, swimming, skin diving, etc. (particularly those designated for tourism purposes).

Class C

1) Fishery Water - for the propagation and growth of fish and other aquatic resources;

Class C

2) Recreational Water Class II (Boatings, etc.)

Class C

3) Industrial Water Supply Class I (For manufacturing processes after treatment)

Class D

navigable waters