Use of ozone in drinking water

Actualizado: 24 may 2020

If you're new to the world of ozone, it may surprise you how prevalent ozone is across the United States. In 2015, there were 300 major water treatment plants in the United States that incorporate ozone use into their processes. By 2020, the number of plants using ozone is projected to reach 425. There is a strong possibility that the water you are drinking has been treated with ozone before consumption.



Ozone was initially used in the United States in 1940 in Whiting, IN for water disinfection in the water treatment process. From there, the use of ozone in drinking water has expanded to its current wide use today. In 1982, ozone received GRAS (generally recognized as safe) approval for use in bottled water. This opened up the use of ozone for disinfection in the bottled water industry.


Today, most bottled water companies use ozone to ensure pure, pathogen-free water for consumers.


The use of ozone in major drinking water plants can perform a variety of functions. Most often, ozone is used as an oxidant to replace chlorine or other chemicals in the process.


Since ozone reverts to oxygen after oxidation, better water quality can be delivered to the customer with less overall waste.


Some of the uses of ozone in drinking water plants are:


- Reduction of the use of chemicals.

- Oxidizes iron and manganese

- Oxidize hydrogen sulfur or other sulfur based compounds

- Elimination of water color.

- Giardia and cryptosporidium disinfection

- Improved filtration efficiency.


Looking to the future, ozone can also be used for the removal of micro contaminants, such as pharmaceuticals in water, personal care products, and endocrine disruptors.


Ozone is currently used in the disinfection of wastewater for these purposes and the use of ozone may be transferred to drinking water plants in the future.


Below are some examples of major US cities. USA Ozone-using: Los Angeles, CA since 1987 Tuscon, AX since 1992 Dallas, TX since 1993 Raleigh, NC since 1999 Seattle, WA since 2000 Orlando, FL since 2004

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