MWRA Environmental Quality Department
NPDES DISCHARGE PERMIT

 

Use the drop-down menu to view reports
required by MWRA's discharge permit.

Contingency Plan Exceedances

MWRA's NPDES discharge permit requires MWRA to report Contingency Plan exceedances to regulatory agencies and the public. The exceedances are triggered by unusual or unexpected results of effluent or ambient monitoring. Effluent monitoring takes place in the treatment plant, while ambient monitoring examines the environment surrounding the outfall.

Caution and Warning Level Exceedances

May 18, 2009
  Ambient Alexandrium (red tide)
May 16, 2008
  Ambient Alexandrium (red tide)
Winter/Spring 2007
  Phaeocystis

See previous years' exceedances


Many of our reports are in PDF format, which requires Adobe Acrobat Reader®, a free program available from Adobe Systems. To request a paper copy of any report, please contact the MWRA Environmental Quality Department at 617-788-4601, or e-mail us at web.enquad@mwra.state.ma.us.
Go to the Harbor and Bay page Contact the Environmental Quality Department