Information and Frequently Asked Questions about HAA5
Archive – HAA5

January 2019 HAA5 Public Notification

April 2019 HAA5 Public Notification

July 2019 HAA5 Public Notification

October 2019 HAA5 Public Notification

January 2020 HAA5 Public Notification

April 2020 HAA5 Public Notification

July 2020 HAA5 Public Notification

October 2020 HAA5 Public Notification

* Important:  The regulatory limit for HAA5 is set as an annual average level (known as the “LRAA”) of 60 parts per billion (ppb). A single reading above 60 ppb does not constitute a regulatory violation or health hazard.