Hi all…for several decades now it has been known that phosphorus reduction is good way to control microcystis blooms (the cyanobacteria that produce the regulated microcystin-LR toxin). However, a recent article reports that “an excess of another nutrient, nitrogen, shifts the balance in favor of Microcystis rather than other HAB-forming cyanobacteria, diatoms, or green algae.” This article is open [...]
For several decades now it has been known that phosphorus reduction is good way to control microcystis blooms (the cyanobacteria that produce the regulated microcystin-LR toxin). However, a recent article reports that “an excess of another nutrient, nitrogen, shifts the balance in favor of Microcystis rather than other HAB-forming cyanobacteria, diatoms, or green algae.”
Hi all…for those of you who deal with raw water reservoirs or lakes that are under threat from cyanobacterial blooms (potentially associated with the regulated microcystin LR) you may find this article interesting. It doesn’t go too deeply into each of the issues it identifies but it does touch on a fair number of topics [...]
For those of you who deal with raw water reservoirs or lakes that are under threat from cyanobacterial blooms (potentially associated with the regulated microcystin LR) you may find this article interesting...
Hi all…the USEPA’s Contaminant Candidate List 4 (CCL 4) was finalized November 17, 2016. The CCL is a list of contaminants that are currently not subject to any proposed or promulgated national primary drinking water regulations, but are known or anticipated to occur in public water systems. Contaminants listed on the CCL may require future regulation [...]
Hi all…the Water Research Foundation has just released a report entitled “A Methodology for Locating and Managing Dynamic Potential Source Water Contaminant Data – Project 4581.” “The purpose of the project was to develop and demonstrate a methodology for identifying potential sources of contamination upstream of drinking water intakes, particularly from above ground storage tanks [...]
Hi all…The USEPA recently released its Lead and Copper Rule Revisions White Paper. The goals of the LCR revisions are to identify new strategies to further reduce lead and copper exposure, as corrosion control treatment may not be effective enough in all drinking water systems. The 18 page document is available for free download at: [...]
Hi all…The US Centers for Disease Control (CDC) released a toolkit in June of this year to “provide an easy-to-understand interpretation of ASHRAE Standard 188 to help building owners and managers evaluate the water system and devices in their building(s) to see if they need a (Legionella growth and spread) program, and then develop an [...]
Hi all…despite the fact that it’s almost November, a cyanobacterial bloom generating microcystin recently occurred in a small lake near Waterloo. It is fitting then that a perspective “on the rise of toxic cyanobacteria” published earlier this year in the Canadian Journal of Fisheries and Aquatic Sciences is predicting cyanobacterial blooms are most likely to increase [...]
Hi all…I’ve come across another study which most drinking water/public health providers will never see but it contains an extremely important finding. Previous watershed surveys have revealed that E. coli O157/E. coli O157:H7 are detected relatively infrequently (less than 5% of samples). While it is not typically present it would nonetheless be expected that disease outbreaks would [...]
