The state of water resources in the Philippines - Greenpeace

D. Standards for wastewater emissions
The standards for discharge of effluents to the different classifications of water
bodies are prescribed in DENR AO 35. These effluent standards consist of a set
of water quality parameters and their corresponding numerical limits that any
wastewater discharge coming from a point source (i.e. industrial plants and
municipal sewerage systems) are required to meet.
The following tables present the Effluent Standards for different water quality
parameters based on pollution sources.
Parameter
Unit
Protected
Waters
Category I
(Class AA
& SA)
Protected
Waters
Category II
(Class A,B
& SB)
Inland
Waters
Marine
Waters
Marine
Waters
Class C Class SC Class SD
OEI NPI OEI NPI OEI NPI OEI NPI OEI NPI
Arsenic mg/L (b) (b) 0.2 0.1 0.5 0.2 1.0 0.5 1.0 0.5
Cadmium mg/L (b) (b) 0.05 0.02 0.1 0.05 0.2 0.1 0.5 0.2
Chromium mg/L (b) (b) 0.1 0.05 0.2 0.1 0.5 0.2 1.0 0.5
(hexavalent)
Cyanide mg/L (b) (b) 0.2 0.1 0.3 0.2 0.5 0.2 - -
Lead mg/L (b) (b) 0.2 0.1 0.5 0.3 1.0 0.5 - -
Mercury (Tot.) mg/L (b) (b) 0.00 0.00 0.00 0.00 0.00 0.00 0.0 0.01
5 5 5 5 5 5 5
PCB mg/L (b) (b) 0.00 0.00 0.00 0.00 0.00 0.00 - -
3 3 3 3 3 3
Formaldehyde mg/L (b) (b) 2.0 1.0 2.0 1.0 2.0 1.0 - -
Table 7. effluent standards: toxic and other deleterious substances (maximum limits for
the protection of public health)
Industrial and other effluents when discharged into bodies of water classified as Class A, B, C, D, SA, SB,
SC, and SD should not contain toxic substances greater than those indicated below.
Effluents from domestic sewage and industrial wastewater treatment plants when
discharged into receiving waters classified as Class A, B, C, D, SA, SB, SC, and
SD should not contain pollutants in concentration greater than those indicated in
Tables 8 and 9 (following page).
GREENPEACE | The state of water in the Philippines 36