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Access LevelDateTitleDescription
6/27/2017Development of a Risk Communication Tool Kit for Cyanotoxins
Do you need to communicate the potential risk of cyanotoxins in drinking water? While some communication tools and resources for utilities have been developed, utilities and the customers that they serve need additional targeted messages and materials. This webcast will discuss the findings of WRF project #4697, Development of a Risk Communication Toolkit for Cyanotoxins. Listeners will learn about specific attributes of the cyanotoxin risk management framework that can create potential communication barriers, for example the complexity of the EPA health guidance and the uncertainty inherent in monitoring and testing timing and protocol. Listeners will also be introduced to the linguistic research carried out during the project, which was used to develop recommended health advisory/alert language. This Webcast is designed to provide listeners with the necessary knowledge to develop and deliver effective cyanotoxin risk communications.
7/13/2017Evaluation and Optimization of Cyanotoxin Analytical Methods
This webcast will explore the results of Performance Evaluation of Methods for the Analysis of Cyanotoxins (project #4647). The goal of this project is to compare the Ohio EPA and U.S. EPA (Method 546) ADDA-ELISA methods and EPA Method 544, “Determination of Microcystins and Nodularin in Drinking Water by Solid Phase Extraction (SPE) and Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)” and investigate the inconsistencies between the methodologies as well as the precision and accuracies within each method. With the release of the EPA Drinking Water Health Advisory Cyanobacterial Microcystin, the Ohio EPA HAB Monitoring and Reporting Rules, and the 2018-2020 Unregulated Contaminant Monitoring Rule using ADDA-ELISA methodology and/or LC/MS/MS to determine microcystin concentrations, it is important to understand the strengths and weakness of these methods at the part-per-trillion detection levels in drinking water. The information obtained during this project can be used to design a larger and more comprehensive inter-laboratory study to compare and evaluate the methodologies and variability between methods and laboratories. The findings for this project will be published in 2018; however, valuable preliminary findings will be shared during this webcast.
8/22/2017Treatment Approaches for Managing Dissolved and Intracellular Cyanotoxins
RESCHEDULED FROM 8/15/17
The increase of cyanobacteria blooms and associated metabolite release (taste and odor-causing compounds and cyanotoxins) are causing numerous problems for water treatment plants in terms of maintaining treatment performance, managing disinfection by-products (DBPs), and dealing with the potential presence of the cyanotoxins themselves. The EPA issued health advisories in June 2015 for two cyanotoxins (microcystins and cylindrospermopsin) and utilities have been struggling with how to manage bloom events and optimize treatment to remove cyanotoxins. This webcast will highlight the effectiveness of conventional and advanced treatment processes for managing intracellular and extracellular cyanotoxins while minimizing unintended consequences. In addition, a summary of the Hazen-Adams CyanoTOX model v.2.0 will be presented. Case studies will be used to illustrate how the model worked at various utilities and will be used to provide a basis for evaluating treatment options. Overall, the model can also be used to evaluate different treatment scenarios during water treatment plants’ decision-making processes, allowing plant managers and operators to make informed decisions about which and how much oxidant is needed to meet their water quality goals.