Air Mail Bulletin: New Ozone Standard and Air Quality Violation in North Minneapolis

Air Mail bulletin

EPA Announces New Ozone Standard

The U.S. Environmental Protection Agency (EPA) announced today its proposal for a revised National Ambient Air Quality Standard for ground-level ozone.  EPA proposes to strengthen the standard to within a range of 65 to 70 parts per billion (ppb), while taking comments on a level as low as 60 ppb.  A 90-day public comment period on the proposal will open once the proposal is published in the Federal Register, probably in the next few weeks. EPA plans to finalize the standard in the fall of 2015.  More information is available on the EPA’s website.

MPCA Finds Air Quality Violation in North Minneapolis

Recent air monitoring found a violation of the Minnesota standard for Total Suspended Particulate (TSP) in North Minneapolis.  The standard was exceeded on two days in October and November, which, under state rules, constitutes a violation of the standard.  MPCA Industrial Division Director Jeff Smith said monitoring since the exceedances has shown no further violations but that the agency is taking steps to identify potential sources of or contributors to the violation and to prevent future occurrences.  The MPCA sent out a press release about the violation on November 24, available on the Agency’s website.