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By Jane Clary, Brandon Steets, Jonathan Jones, Eric Strecker, and Marc Leisenring Pathogens are the top cause of stream impairments nationally, with over 10,500 stream segments identified as impaired as of 2012—typically due to elevated concentrations of fecal indicator bacteria (FIB) in waterbodies. Although strict numeric effluent limits for stormwater discharges are not typically required yet in most communities, the implementation phase of total maximum daily loads (TMDLs) may result in Natio...... continue reading
From: Stormwater Topics: Bacterial Detection, Pollutants, Research
By Gretel Silyn Roberts
With many new bacterial total maximum daily loads (TMDLs) statewide in California and the strict regulatory requirements they impose on dischargers, it is important to understand the true extent of how bacteria arrive, thrive, and die in urban environments. In southern California, with the “Total Maximum Daily Loads for Indicator Bacteria, Project I—Twenty Beaches and Creeks in the San Diego Region (Including Tecolote Creek)” now in place, many permittees are focusing on controllable anthropogenic sourc...... continue reading
From: Stormwater Topics: Bacterial Detection, Research, Water Quality Monitoring
By Lynn Merrill
With over 126 different constituents to test for in stormwater flows, and the media sensationalizing about male fish growing eggs, what should a stormwater manager really be concerned about? In a nutshell—all of it. Yet while chemical compounds with names such as butyl benzyl phthalate or 1,2,4-trichlorobenzene conjure up visions of the Swamp Thing, pathogens have an immediate impact on human health through the transmission of diseases. According to the EPA, of the 54,363 top 100 impairments reported th...... continue reading
From: Stormwater Topics: Bacterial Detection, Regulatory Issues, Water Quality Monitoring
By Mary Catherine Hager
Water-quality supervisors and stormwater managers face a daunting challenge in determining and eliminating sources of fecal bacterial contamination, especially when the contamination occurs in coastal waters. Charles McGee, microbiology laboratory supervisor for California’s Orange County Sanitation District, expresses the overwhelming issues stormwater managers confront in resolving bacterial contamination in coastal areas: "In our marine environment we have significant contributions to our beaches fro...... continue reading
From: Stormwater Topics: Bacterial Detection, Pollutants, Water Quality Monitoring
EPA is holding four public information meetings to provide information on the proposed revisions to the Total Coliform Rule (TCR). The proposed revisions are contained in the proposed Revised Total Coliform Rule (RTCR) which was published in the Federal Register on July 14, 2010. During the public meetings, EPA will discuss the major provisions of the current TCR, the history of the development of the proposed RTCR, the core elements of the proposed RTCR, the comparison between the current T...... continue reading
From: Stormwater Topics: Bacterial Detection, Regulatory Issues
By John F Skinner, John Kappeler, Joseph Guzman
Recently the city of Newport Beach, CA, and the Orange County (CA) Health Care Agency Water Quality Laboratory have completed studies presenting evidence that biofilm regrowth of enterococci and fecal coliform bacteria is occurring in street gutters and storm drains. This may explain the occasional high levels of these bacteria in runoff water flowing from residential areas into nearby Newport Bay. If these findings of regrowth are duplicated by others, the health threat to recreational swimmers resulti...... continue reading
From: Stormwater Topics: Bacterial Detection, Research, Water-quality Monitoring
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