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Occurrence of chlorate in hypochlorite solutions used for drinking water disinfection

Article Abstract:

There are significant amounts of chlorate ions in drinking water disinfected with a hypochlorite solution, according to a study that analyzed the chlorination process at 14 water treatment sites. The study measured chlorate ion concentrations but did not determine the source of the chlorate ion contamination. In addition, a one-milligram-per-liter dose of free available chlorine adds 110 micrograms per liter of chlorate ions to treated drinking water, according to one estimate based on the median chlorate ion concentration.

Chlorates

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Physical and chemical characterization of indoor aerosols resulting from the use of tap water in portable home humidifiers

Article Abstract:

The use of tap water in portable home humidifier were found to produce high concentrations of PM10 aerosols. The aerosols were principally composed of submicron particles with mineral composition matching that of the tap water. Soluble salts were measured in high concentration varying by the type of drinking water used. The amount of aerosols generated can be controlled by using water with a low level of impurities.

Aerosols

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Indoor asbestos concentrations associated with the use of asbestos-contaminated tap water in portable home humidifiers

Article Abstract:

Using asbestos-contaminated water in a portable home humidifier can result in higher-than-normal levels of asbestos concentrations in indoor air. Ultrasonic and impeller humidifiers both expelled asbestos fibers into the air with the impeller's aerosol having slightly longer fibers. The aerosols measured in testing contained asbestos concentrations which equated with the concentrations in the water used.

Asbestos

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