News Details

April 02, 2025

Temporary change in drinking water during ozone system upgrade

The city of Oshkosh uses a combination of ozone and chlorine to disinfect its drinking water. In 2025, the city of Oshkosh is replacing the ozone system equipment at the Water Filtration Plant.

During this project, there will be periods of time that the ozone system will be offline, and chlorine will be utilized as the primary water treatment method to meet disinfection regulations. The level of residual chlorine in the water will remain safe to drink, but some residents may notice an increased smell or taste of chlorine in their water.

The first ozone system shutdown is planned to start on Monday, April 7th. This shutdown is expected to last a few weeks. As construction progresses, the ozone system may be offline multiple times. The city of Oshkosh will distribute information updates regarding the shutdown to the public as conditions change.

To reduce the scent and taste of chlorine, the following actions can be helpful:
• Utilize a filter such as an activated carbon filter to remove residual chlorine.
• Pour water into a glass or pitcher and wait 15 - 20 minutes to evaporate chlorine.
• Boil water for 15 minutes to evaporate chlorine.

If you have questions regarding this project and the temporary shutdown of the ozone system, please contact the Department of Public Works at 920-236-5065.

For general questions regarding drinking water quality, contact the Water Filtration Plant at 920-236-5165.

The Oshkosh Department of Public Works

The Department of Public Works ensures the maintenance, development, and operation of essential infrastructure and services in the City of Oshkosh. Public Works combines innovation, sustainability, and efficiency to enhance city infrastructure and services for residents.
For more information, visit the City of Oshkosh website at https://www.oshkoshwi.gov.