DENR-EMB • TECHNICAL COMPLIANCE
Know the Standards: DAO 2016-08 and DAO 2021-19
Two important references for wastewater practitioners are DENR Administrative Order 2016-08, which established Water Quality Guidelines and General Effluent Standards, and DAO 2021-19, which updated selected parameters. EMB regional water-quality resources continue to identify both regulations.
This means STP design should start from the required effluent quality rather than selecting a treatment process first.
Parameters can influence whether a system requires basic biological treatment, nutrient removal, tertiary filtration, chemical treatment or additional disinfection.
The correct approach is:
Influent → Applicable Standard → Treatment Objectives → Process Design → Monitoring
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