WATER QUALITY VARIANCE FOR THE CHARLES RIVER: AN ON-GOING EXAMPLE OF THE PROCESS FOR WATER QUALITY STANDARDS REVISIONS FOR CSO-IMPACTED WATERS
The Massachusetts Water Resources Authority (MWRA) completed its Long-Term Control Plan for CSO control (LTCP) in 1997. The plan used a watershed approach to assess the impacts of CSO in the context of other sources of pollution in the watershed, including stormwater and upstream flow. The recommended plan proposed to eliminate CSO to critical use areas, and cost-effectively minimize CSO in non-critical use areas. Regulatory acceptance of the plan was contingent upon changing existing water quality standards in areas where CSO would remain. At the time that the LTCP was being developed, the state water quality standards were being revised to establish a category under which minimized CSO discharges could remain, provided that certain specific conditions were met. Based on the MWRA's LTCP, the United States Environmental Protection Agency (EPA) and the Massachusetts Department of Environmental Protection (DEP) agreed to revise the water quality standards for certain waters within Boston Harbor, but the two agencies did not agree on the methodology for meeting the criterion for “substantial and widespread social and economic impact”. For the Charles River, a temporary water quality variance was granted to allow further study of the impacts of non-CSO sources of pollution, as well as for additional CSO control alternatives, prior to a final determination of the water quality standard. The conditions of the variance defined the activities to be undertaken to provide the information needed to make a final water quality standards determination. These activities included: conducting an assessment of providing additional CSO storage; conducting a performance evaluation of the MWRA's Cottage Farm CSO Facility, which discharges to the Charles River; developing a more detailed stormwater runoff model for areas tributary to the Charles River; and upgrading the receiving water model for the Charles River. A report summarizing these activities was submitted to the DEP in January 2004, and the report is currently under review by that agency.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
Document Type: Research Article
Publication date: 01 January 2004
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites