Our purpose in this blog is not to give blow by blow coverage or a detailed history of all that is going on with a particular topic, but to note and comment on current studies, papers, activities, actions, and respond to questions. When appropriate, reference is made to other web sites where background or additional information can be found.
Those of you needing background on chromium 6 (Cr-VI) and what is happening, particularly in California, should click here for a good Cr-VI background web page prepared by the Association of California Water Agencies (ACWA).
During the last three decades the total extent of ice melt on the Greenland ice sheet has been increasing. The following paper found recent melting similar in magnitude but so far shorter in duration than 1920–1960 melt. The 2007 record melt is not statistically different from 20 other melt seasons. If this melt trend continues, the authors conclude it will soon exceed any melt during the past 226 years.
Oliver W. Frauenfeld, Department of Geography, Texas A&M University, College Station, Texas, USA
Paul C. Knappenberger, New Hope Environmental Services, Charlottesville, Virginia, USA
Patrick J. Michaels, Cato Institute, Washington, D. C., USA
A reconstruction of annual Greenland ice melt extent, 1784–2009
Journal of Geophysical Research, VOL. 116, D08104, 7 PP., 2011; d oi:10.1029/2010JD014918
For those of you interested in a high-level policy report on California’s drinking water program, check out this Senate Office of Research report. It provides a political perspective, although I have to wonder if someone writing regulations can actually deliver safe water…..seems to me that is done by the engineers and operators who design and operate the water systems.
Click here for the California Senate Report: The Water We Drink: What is California Doing to Ensure Its Water is Safe?
The city has developed a multifaceted source water approach to ensure a sustainable long-term water supply and comply with the USEPA MCL for radium by their legal deadline of June 2018. Under the plan deep wells would be used, along with a Lake Michigan diversion from Milwaukee and return flow to the Great Lakes, which alone is projected to cost $164 million with $6.2 million in annual operation and maintenance costs.
Click here for the Waukesha Patch news article.
Two Town wells found to have radium higher than the regulatory level….few details reported….health risk likely not significant.
Click here for the Press of Atlantic City article.
A construction worker accidently drained 200,000 gallons of brownish, stagnant water (sitting for years) in to the drinking water conduit, rather than the waste water conduit. A Do Not Drink order was issued and expected to be in force for at least 48 hours.
This suburb of Montreal is reported to have 18,615 residents; 4,800 street addresses; along with 1,800 businesses. Each resident with proof of residency is being provided with bottled water, up to 4-L per person per day.
So, if we assume $US 0.75 per L of bottled water, and all residents obtain their 4-L allotment each day, that amounts to $55,845 per day!….or about $100,000 for 2-days……a high cost of 1 wrong valve turned!
Click here for the Montreal Gazette news article.