What is Governmental Agreement 236-2006, what does it require of an industrial plant, and since when is it mandatory?

It is the Regulation on Wastewater Discharges and Reuse and Sludge Disposal, in force since May 2006, and today the only national water obligation with teeth. Every generating entity must draw up a Technical Wastewater Study (ETAR) characterizing its effluents, discharges, reuse water and sludge, with technical endorsement, and keep it available to MARN. It set a staged reduction of loads (BOD and the other parameters) in four stages from 2011; the final phase, with full parameters, has been mandatory for private generating entities since May 2, 2024. Municipalities obtained an extension to May 2, 2025 through AG 285-2022, for municipal systems only. For foreign investment held to ESG standards it is the design floor for any industrial wastewater treatment plant (PTAR).