Daily Archives: January 8, 2012

Cape Girardeau (MO) to use groundwater, not Mississippi River

Four new wells allow Cape Girardeau, Missouri to abandon use of the Mississippi River and use only groundwater.  Click here for more…

Photo source: Southeast Missourian

 

Press Spin: Scare people with old news mixed with non-news

This article is quite remarkable….it begins with reminding people about DDT  contamination decades ago, and then says “tap water is contaminated because lead is found”……This type of reporting is completely irresponsible….but expect more of it as liberal activists try to boost drinking water and environmental issues  into the election-year lime light….click here for the article…

Shi et al 2011: Occurrence of Thyroid Hormone Activities in Drinking Water from Eastern China: Contributions of Phthalate Esters

W. Shi, X. Hu, F. Zhang, G. Hu, Y. Hao, X. Zhang, H. Liu, S. Wei, X. Wang, J.P. Giesy, and H. Yu. 2011. Occurrence of Thyroid Hormone Activities in Drinking Water from Eastern China: Contributions of Phthalate Esters. Environ Sci Technol. Dec 15.

Thyroid hormone is essential for the development of humans. However, some synthetic chemicals with thyroid disrupting potentials are detectable in drinking water. The study investigated the presence of thyroid active chemicals and their toxicity potential in drinking water from five cities in eastern China by use of an in vitro CV-1 cell-based reporter gene assay. Waters were examined from several phases of drinking water processing, including source water, finished water from waterworks, tap water and boiled tap water. To identify the responsible compounds, concentrations and toxic equivalents of a list of phthalate esters were quantitatively determined. None of the extracts exhibited thyroid receptor (TR) agonist activity. Most of the water samples exhibited TR antagonistic activities. None of the boiled water displayed the TR antagonistic activity. Dibutyl phthalate accounted for 84.0% to 98.1% of the antagonist equivalents in water sources, while diisobutyl phthalate, di-n-octyl phthalate and di-2-ethylhexyl phthalate also contributed. Approximately 90 % of phthalate esters and TR antagonistic activities were removable by waterworks treatment processes, including filtration, coagulation, aerobic biodegradation, chlorination and ozonation. Boiling water effectively removed phthalate esters from tap water. Thus, this process was recommended to local residents to reduce certain potential thyroid related risk through water drinking.

Click here for the full paper (fee).