Definition: Waste water treatment

Category: Environment

Process to render waste water fit to meet applicable environmental standards or other quality norms for recycling or reuse. Three broad types of treatment are distinguished in the questionnaire: primary, secondary and tertiary . For purposes of calculating the total amount of treated waste water, volumes and loads reported should be shown only under the "highest" type of treatment to which it was subjected.
Source:
OECD/Eurostat Joint Questionnaire - Inland Waters
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