The State of Boston Harbor and Massachusetts Bay
MWRA Environmental Quality Department

Web Report Archive

AMBIENT QUARTERLY MONITORING REPORTS

CONTINGENCY PLAN QUARTERLY REPORTS

CONTINGENCY PLAN EXCEEDANCES

Exceedance Reports

Older Exceedances

CONTINGENCY PLAN MODIFICATIONS

November 2001
October 2000

COMBINED SEWER OVERFLOW (CSO) ACTIVATIONS

Notice of Treated CSO Discharge
March 16, 2010 (PDF)

Notice of Treated CSO Discharge
March 23, 2010 (PDF)

CSO Discharge Estimates and Rainfall Analyses for Calendar Year 2009 (PDF)

Notice of Treated CSO Discharge
August 25, 2010 (PDF)

Notice of Treated CSO Discharge
August 5, 2010 (PDF)

Notice of Treated CSO Discharge
July 10, 2010 (PDF)

Notice of Treated CSO Discharge
June 6, 2010 (PDF)

Request for Extension to Variance for CSO discharges, lower Charles
(April 2010)

Request for Extension to Variance for CSO discharges, Alewife Brook
(April 2010)

Public notice: Alewife Brook CSO update
(April 2010)

Notice of Treated CSO Discharge
March 23, 2010 (PDF)

Notice of Treated CSO Discharge
November 14, 2009 (PDF)

Notice of Treated CSO Discharge
September 12, 2009 (PDF)

Notice of Treated CSO Discharge
July 24, 2009 (PDF)

2011 Report
2010 Report
2009 Report
2008 Report
2007 Report
2006 Report
2005 Report
2004 Report
2003 Report
2002 Report
2001 Report

DISCHARGE MONITORING REPORTS

2011 Reports
2010 Reports
2009 Reports
2008 Reports
2007 Reports
2006 Reports
2005 Reports
2004 Reports
2003 Reports
2002 Reports
2001 Reports

HARBOR AND RIVER REPORTS

MASSACHUSETTS BAY BACTERIA MONITORING

OPERATIONS AND MAINTENANCE

OPERATIONAL NOTIFICATIONS

Wet weather bypass notice: Nut Island Headworks: March 15, 2010

Deer Island Operational Notification
On October 15, 2005, power to Deer Island was lost during routine maintenance at NSTar's K Street Substation in South Boston.

Deer Island Operational Notification
On April 11, 2004, Deer Island lost power when a circuit breaker tripped at NSTar's K Street Substation in South Boston.

Deer Island Operational Notification
From March 31 to April 2 a major storm occurred in the Greater Boston Area, causing a power outage and pumping failure at Deer Island Treatment Plant on April 3, 2004.

PLANT PERFORMANCE

STATE OF BOSTON HARBOR REPORTS (Historical)

2002: Mapping the Harbor's Recovery
1998: Beyond the Boston Harbor Project
1996: Questions and Answers About the New Outfall
1995: The New Treatment Plant Makes its Mark
1994: Connecting the Harbor to its Watersheds
1993: The Role of Science in Harbor Monitoring
1992: Improvements in Sewerage & Water Quality
1991: Boston Harbor Report Card Update
1990: Boston Harbor's Report Card