Frequent Questions

I have heard that some cities are thinking about augmenting their drinking water supply by directly turning wastewater into drinking water. What is this called?

The introduction of treated wastewater directly into a water distribution system without intervening storage is often called direct potable reuse. In contrast, indirect potable reuse includes passing the water through an environmental buffer (e.g., river, lake, aquifer) after treatment. Additional information can be found in USA EPA Guidelines for Water Reuse (EPA625-R-04-08, September 2004) available at

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