Bromate
Bromate forms when ozone disinfection reacts with naturally occurring bromide in source water. The EPA limits bromate to 10 ppb (0.010 mg/L), with a health goal (MCLG) of zero.
EPA MCLG Level
0 mg/L
Maximum level that poses minimal health risk based on the latest science
Health Effects
Classified a probable human carcinogen; long-term exposure is associated with an increased cancer risk. The risk is chronic and lifetime, not acute.
Common Sources
- Byproduct of disinfecting drinking water with ozone
- Elevated when the source water contains naturally occurring bromide
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The EPA MCLG for Bromate is 0 mg/L. Upload your water test (PDF or a photo) and we'll email a plain-English reading of where your result lands — and every other number — free. Educational only, no medical claims.
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Where is Bromate Found?
Bromate has been detected above EPA health guidelines in 134 cities serving 62.0M people across the US.
and 129 more cities
EPA MCLG Level
The EPA MCLG represents the maximum level that poses minimal health risk based on the latest scientific research. It's often more protective than federal legal limits.
Contaminant Type
Bromate is classified as a Disinfection Byproducts contaminant.
Related Disinfection Byproducts Contaminants
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