Wastewater recycling is nothing new If you're still feeling squeamish about DPR, know that it's nothing new: There might already be recycled sewage in your drinking water. Several cities in the U.S. have used a similar system called indirect potable reuse, or IPR, for decades.

Yes, many modern cities in 2026 utilize a process known as Potable Water Reuse, often colloquially (and somewhat unfairly) called "toilet-to-tap" recycling. This process involves taking treated wastewater (sewage) and putting it through a multi-stage, high-tech purification process—including microfiltration, reverse osmosis, and ultraviolet disinfection with hydrogen peroxide. Cities like Singapore, Windhoek (Namibia), and Orange County, California, are global leaders in this technology. In most cases, the recycled water is not sent directly back into the drinking pipes; instead, it is used for "indirect" reuse, where it is pumped into underground aquifers or reservoirs to be naturally filtered further before being withdrawn months later for municipal use. This is a critical sustainability strategy as global droughts increase, as it creates a "closed-loop" system where water is never truly wasted. The resulting water is often scientifically cleaner than traditional tap water, as the reverse osmosis process removes pharmaceuticals and minerals that standard treatment plants might miss, making it one of the most reliable "future-proof" water sources for urban populations.