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Treated wastewater (primary, secondary and tertiary) annually produced by municipal wastewater treatment facilities in the country. Primary treatment processes can include: sedimentation tank, septic tank, skimming, chemical enhanced primary treatment. Secondary treatment makes use of natural bio-chemical processes to treat wastewater and can include: waste stabilization pond, constructed wetlands, overland treatment, nutrient film techniques, soil aquifer treatment, high-rate algal pond, floating aquatic macrophyte systems. Tertiary treatment process can include: membrane filtration (micro-; nano-; ultra- and reverse osmosis), infiltration / percolation, activated carbon, disinfection (chlorination, ozone, UV)

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Related Variables

Nationally derived quality of groundwater Proportion of groundwater bodies with good ambient water quality Proportion of bodies of water with good ambient water quality (SDG 6.3.2) Proportion of open water bodies with good ambient water quality

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