critical green has emerged as a corporate entity through an evolutionary process spreading over a decade, having focus on resolving the water security and quality issues in pakistan, through deploying cost-effective, sustainable and socially acceptable solution to improve drinking water quality, promote water re-use as a mean of addressing water scarcity in pakistan. after rigorous testing, applying and evaluating various available and scientifically tested instruments, critical green has specialized the deployment of bioremediation, through constructed wetlands (cws), as required to meet environmental quality standards (neqs) for water sector in pakistan.