Understanding the Safety of Using Distilled Water Treated with Ozone in Ultrasonic Humidifiers

Distilled water treated with ozone is often found in various applications, including ultrasonic humidifiers. However, concerns arise about whether this water can release aerosolized ozone gas that poses health risks when used in home environments. This article aims to clarify these issues and provide guidance to ensure safe usage.

Using Distilled Water that Lists 'Ozone' in Water

Distilled water treated with ozone is typically used for its disinfecting properties. During the treatment process, ozone is infused into the water where it acts as a powerful antimicrobial agent. Ozone, however, is a gas and is highly reactive. When inhaled, it can lead to respiratory issues and other health problems due to its strong oxidizing nature.

Ultrasonic Humidifiers and Ozone Release

Ultrasonic humidifiers work by converting liquid water into tiny mist particles through the use of ultrasonic technology. The process involves generating high-frequency vibrations in the water, creating a fine mist that spreads into the air. If the water contains dissolved ozone, it can be aerosolized and released into the air as part of the mist. The concentration of ozone in the mist depends on the amount of ozone dissolved in the water and the efficiency of the humidifier.

Health Risks Associated with Aerosolized Ozone

Health organizations like the Environmental Protection Agency (EPA) and other health entities warn that breathing ozone can lead to a range of health issues. These include irritation of the respiratory tract, reduced lung function, and exacerbation of asthma and other respiratory conditions. Long-term exposure to high levels of ozone can cause more severe health problems.

Recommendations for Safe Usage

To minimize health risks, it is best to avoid using any water that contains ozone in an ultrasonic humidifier. This advice is based on several key considerations:

Decay of Ozone in Water: Ozone decays in water, and its half-life can be accelerated by impurities, bottle temperature, and exposure to visible light. The decay rate is particularly rapid in ultra-pure water kept at a temperature of around 60°F in stainless steel piping, with a half-life of about 4 hours. Commercial Practices: Water bottlers typically control the ozone levels to be between 0.2 to 0.4 ppm, with some exceptions due to equipment failures. This level of ozone is generally too low to produce a noticeable smell or effect. Recommendations: Manufacturers often sterilize the water and bottles for a certain period before they are bottled and sold to ensure they are safe to use. The recommendation is based on the understanding that any ozone present would have decayed by the time the water reaches the consumer.

Conclusion

In summary, the ozone used for treatment in distilled water typically decays rapidly and is significantly reduced by the time the water is bottled and sold. While it is theoretically possible for a small amount of ozone to be aerosolized when using this water in an ultrasonic humidifier, the risk is minimal and should not pose a significant health hazard under normal usage conditions. To ensure safety, it is recommended to avoid using any water containing ozone in ultrasonic humidifiers.

Note: This information is provided for general guidance and should not replace professional medical advice. Individuals with pre-existing respiratory conditions or concerns should consult a healthcare provider.