California’s Office of Environmental Health Hazard Assessment (OEHHA) has announced the “Amendment to Section 25705 No Significant Risk Level (NSRL) for Bromodichloroacetic Acid (BDCAA).” The change confirms that the NSRL for bromodichloroacetic acid is 0.95 micrograms per day.
Bromodichloroacetic acid is a water-disinfectant byproduct. It was listed as a carcinogen under Prop 65 on July 29, 2016 based on a 2015 report by the National Toxicology Program (NTP).
The OEHHA listed BDCAA as a carcinogen based on criteria verified by an authoritative body. The supporting documents used as the basis for the administrative listing of bromodichloroacetic acid was included in the agency’s “Notice of Intent to List Bromodichloroacetic Acid” published on its website as well as in the California Regulatory Notice Register in May 2016.
The notice also invited public comments during the period that ended on June 27, 2016. However, OEHHA did not receive any public comments on bromodichloroacetic acid.
Bromodichloroacetic acid is a byproduct of water treatment processes using chlorine and other halogenated oxidants, according to the NTP report.
Bromodichloroacetic acid and other water disinfection byproducts increase the possibility of cancer and may cause fetal growth and development problems during pregnancy.
California’s Proposition 65 requires manufacturers and retailers to provide the required warnings to consumers and workers using or exposed to their products that used chemicals listed under the system. However, setting an NSRL provides a ‘safe harbor’ level. A Prop 65 warning is not required for any product containing the listed chemical below the “safe harbor level. The new Safe Harbor level will take effect on April 1, 2019.
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