Loading...
Bacteria TMDL Development for Lower Chickahominy River Watershed Located in Charles City, James City, and New Kent Counties, VA
Abstract
Section 303(d) of the Clean Water Act (CWA) and the United States Environmental Protection Agency’s (USEPA’s) Water Quality Planning and Management Regulations (40 CFR Part 130) require states to develop total maximum daily loads (TMDLs) for waterbodies that are exceeding water quality standards (WQSs). TMDLs represent the total pollutant loading that a waterbody can receive without violating WQSs. The TMDL process establishes the allowable loadings of pollutants for a waterbody based on the relationship between pollution sources and in-stream water quality conditions. By following the TMDL process, states can establish controls based on water quality conditions to reduce pollution from both point and nonpoint sources to restore and maintain the quality of their water resources. There are eight bacteria impairments in this study area. The Chickahominy River, Gordon Creek, and Diascund Creek (tidal) are listed on Virginia's 303(d) list because more than 10% of the total samples in the assessment period exceeded the Primary Contact Use (recreational/swimming) enterococci single sample maximum criterion of 104 colony forming units per 100 mL (cfu/100 mL). The Beaverdam Creek, the freshwater Unnamed Tributary to Beaverdam Creek, Diascund Creek (non-tidal), Mill Creek, and Barrows Creek are listed on Virginia's 303(d) list because more than 10% of the total samples in the assessment period exceeded the Primary Contact Use (recreational/swimming) E. coli single sample maximum criterion of 235 colony forming units per 100 mL (cfu/100 mL). Table ES.1 shows the details of impairments and Figure ES.1 shows the locations of these impairments. more....
Description
Date
2017-02-24
Journal Title
Journal ISSN
Volume Title
Publisher
Collections
Download Dataset
Files
Rights Holder
Usage License
Embargo
Research Projects
Organizational Units
Journal Issue
Keywords
Research and Technical Reports, TMDL, environmental monitoring
Citation
Advisor
Department
Virginia Institute of Marine Science
DOI
https://doi.org/10.25773/v5-wasd-ts57