Tag Archives: United States

Groundwater quality in the glacial aquifer system, northern USA

Erickson ML, Yager RM, Kauffman LJ, Wilson JT. Drinking water quality in the glacial aquifer system, northern USA. Sci Total Environ. 2019 Aug 2;694:133735. doi: 10.1016/j.scitotenv.2019.133735

Groundwater supplies 50% of drinking water worldwide, but compromised water quality from anthropogenic and geogenic contaminants can limit usage of groundwater as a drinking water source. Groundwater quality in the glacial aquifer system, USA (GLAC), is presented in the context of a hydrogeologic framework that divides the study area into 17 hydrogeologic terranes. Results are reported at aquifer-system scale and regional (terrane) scale. This paper presents a quantitative assessment of groundwater quality in the GLAC using data from numerous sources for samples collected 2005-2013, compared to health-based and aesthetic (non-health) benchmarks, and evaluated with areal and population metrics. Concentrations above a benchmark are considered high. Trace elements are widespread across the study area, with an estimated 5.7 million people relying on groundwater with high concentrations of one or more trace elements; manganese and arsenic are most often at high concentration. Nitrate is found at high concentration in 4.0% of the study area, serving about 740 thousand people. Organic compounds including pesticides and volatile organic compounds are high in 2.0% of the assessed study area, with about 870 thousand people relying on groundwater with high concentrations of an organic compound. High arsenic and manganese concentrations occur primarily in the terranes with thick, stratigraphically complex, fine-grained glacial sediment, coincident with groundwater under reducing conditions (indicated by iron concentrations >100 μg/L); high nitrate is uncommon in those same terranes. When nitrate is high in thick, fine-grained, complex terranes, though, it is much more commonly associated with groundwater under more oxidizing conditions. Common geogenic trace elements occur at high concentration due to characteristic geologic and geochemical conditions. Conversely, anthropogenic nitrate and organic compounds are introduced at or near the land surface. High concentrations of nitrate or organic compounds are generally limited to areas in proximity where people live and use the chemicals.

US midwest temperatures down

“Peak temperatures in the Midwest have plummeted since the 19th century. This is the first year the Midwest did not make it up to 99 degrees, with a peak of  98 degrees on 7/21/2019 at station PALESTINE IL USC00116558.  That is down 20 degrees from the peak in 1936.” click here

Here is a real climate crisis…

“Unlike the completely imaginary climate crisis of 2019, there was a very real climate crisis on this date in 1930.” click here

The US surface temperature record includes fabricated values inserted in place of”data” (actual measurements)

Just how hot was it in Chicago?

“On July 29, 1916 the average afternoon temperature in the Midwest was 98 degrees. The Chicago Tribune thought it was hotter than hell.” click here

NOAA hidden data indicates US below normal temperatures so far in 2019

“Little known data from the state of the art U.S. Climate Reference Network (which never seems to make it into NOAA’s monthly “state of the climate” reports) show that for the past nine months, six of them were below normal, shown in bold below.” click here

The hottest day on record in the western US

“There have been 11,500 summer days since 1895.  July 18, 1936 was the hottest and the only one which averaged 100 degrees (99.6F)  in the western US.” click here