The old guidelines contained in DENR DAO-34 and 35 series of 1990 are now superseded.Section 19e says that the DENR shall enforce, review and revise within 12 months from the effectivity of the Clean Water Act, water quality guidelines after due consultation with the concerned stakeholder sectors.The long delay, I presumed, was due to the numerous public consultations that were conducted to ensure that all concerns are addressed.
Wastewater Effluent Standards Series Of 1990For instance, a river classified as Class A, or a public water supply class II, must have a BOD of 3 mgL and a dissolved oxygen level of 5mgL. A swimming and bathing water body like the Manila Bay which falls under SB category should have a fecal coliform level of 100 MPN100ml only. Fecal coliform are found in the intestines and feces of people and animals. The presence of fecal coliform in water often indicates recent fecal contamination. Note that that current fecal coliform level of Manila Bay exceeds standards. ![]() In the new guidelines, significant effluent quality parameters for each industry are specified. They are based on the most probable pollutant that a type of industry will discharge into the environment. Textile mills will have host of parameters which includes color, temperature, BOD, COD, Chromium, Phenol and Phenolic substances, oil and grease, surfactants, Ammonia, Copper, and Trichloroethylene. These significant parameters however can still be modified through an appeal to the DENR Secretary. Section 19f says, That when new and more stringent standards are set in accordance with this section, the Department may establish a grace period with a maximum of five (5) years: Provided, finally, That such grace period shall be limited to the moratorium on the issuance of cease and desist andor closure order against the industrys operations except in the event such operation poses serious and grave threat to the environment, or the industry fails to institute retooling, upgrading or establishing an environmental management system (EMS). The Pollution Control Officers of every company should get a copy of the new DAO. The forum was attended by a hundred of participants from different industries where the Salient Provisions of the 2016-08 were discussed by Environment Management Bureau (EMB), Supervising Environmental Management Specialist Leza Acorda-Cuevas. Some terms defined were taken from issuances of DENR, Department of Health, Philippine Statistics Authority, and Philippine Coast Guard as well as from international agencies such as the United States Environmental Protection Agency (US EPA) and Southern Australia Environment Protection Authority. With this, industries shall only be required to monitor effluent quality parameters determined to be significant to them. In consideration for establishments with influent BOD greater than or equal to 3,000 mgL, separate effluent standards were set but applicable only for establishments discharging to Class C, Class D, Class SC and Class SD water bodies. ![]() Wastewater Effluent Standards Trial Manufacturing PlantsIt also has a note that states that the effluent standards apply to industrial manufacturing plants and municipal treatment plants discharging more than thirty (30) cubic meters per day.
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