A National Assessment of Tmdl Effectiveness Monitoring Approaches
One of the most important aspects of a Total Maximum Daily Load (TMDL) is monitoring the effectiveness of the implementation plan for achieving water quality standards. We evaluated the different TMDL effectiveness monitoring approaches used across the United States. By statute, EPA cannot approve or disapprove the TMDL implementation plans developed by the States and relevant stakeholders. As such, there are no federal requirements directing how the TMDL goals are achieved, including effectiveness monitoring. This situation has resulted in a wide variety of different approaches used across the United States to monitor TMDL effectiveness. Effectiveness monitoring during implementation of TMDLs is important for a number of reasons. Monitoring can help determine if the implementation plan is successful in reaching the allocations set by the TMDL. Monitoring can also demonstrate the reasonable assurance required by EPA for non-point source reduction strategies and may help to protect stakeholder interests. Effectiveness monitoring includes the assessment of both output and outcome performance measures. For this study, we compiled a list of different TMDL effectiveness assessment approaches used nationwide. Approaches were categorized based on similarities, and evaluated for statistical methodology (if any). We evaluated monitoring approaches used for TMDLs developed by both the states and EPA. We found that a wide variety of assessment approaches are being used due to the numerous types and complexities of TMDLs nationwide. Most states determine TMDL success as delisting from the §303(d) List. We reviewed each State's §303(d) Listing policy to assess what statistical methods are used to list or delist water segments. The results indicate that most states do not incorporate statistical methods in their data evaluations.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
Document Type: Research Article
Publication date: 2007-10-01
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 These proceedings are not peer reviewed.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