This is a list of all documents accepted for permanent retention under the subject classification 'Natural resources and the environment: Water resources: Groundwater'.
Natural resources and the environment:
Water resources:
Groundwater
An Analysis of Groundwater Use to Aquifer Potential Yield in Illinois (covers 2000) [Contract Report 2004-11]
This Illinois State Water Survey report summarizes a comparison of Year 2000 groundwater withdrawals against estimated aquifer potential yields on a township basis.
An initial evaluation of the impact of pesticides on groundwater in Illinois: report to the Illinois legislature (1990) [COOP-12]
In this report, the Illinois State Geological Survey (ISGS) and the Illinois State Water Survey (ISWS) have responded to the mandate of the Illinois Groundwater Protection Act that the Illinois Department of Energy and Natural Resources (IDENR) evaluate the impact of pesticides upon groundwater. This preliminary evaluation summarizes data on the extent of groundwater contamination by pesticides, identifies agricultural practices that may contribute to groundwater contamination, and presents recommendations to minimize contamination.
Aquifer sensitivity to contamination, Kane County, Illinois [ICGM Kane-AS]
Map (1 sheet) depicting the relative potential for aquifers within 100 feet of the land surface to become contaminated from sources of pollution at or near the ground surface. Scale 1:100,000
Arsenic Geochemistry and Distribution in the Mahomet Aquifer, Illinois [RR-107]
Groundwater samples were collected from approximately 50 private wells in Tazewell County, an area where arsenic contamination is known from previous sampling, and northwest Champaign County, an area for which very few arsenic data were available. Most of the wells were finished in the Mahomet Aquifer, with roughly equal numbers of wells near the bottom, middle, and upper part of the aquifer. A few of the wells were finished in the Glasford Aquifer, which lies above the Mahomet. A reliable, robust method for arsenic speciation was developed based on separation of species by HPLC and ICP-MS detection. The samples were analyzed for total arsenic, arsenic species, metals, anions, alkalinity, ammonium, and total organic carbon. Samples of raw groundwater and finished potable water were collected from 11 municipal water treatment plants that withdraw water from the Mahomet Aquifer.
Arsenic in groundwater in central Illinois. (2005) [IEM-2005-02]
In October 2003, Illinois State Water Survey (ISWS) scientists collected water samples from 70 shallow domestic and industrial wells in Kane County for analysis of groundwater quality. The primary objectives were to provide a 'snapshot' of water quality in these shallow aquifers and compare water quality from different parts of Kane County, especially the eastern urban corridor and the western rural region.
Arsenic in Illinois Groundwater: General Information
This web page provides general information on arsenic in Illinois groundwater and links to more specific information.
Assessment of the geology and hydrogeology of two sites for a proposed large dairy facility in Jo Daviess County near Nora, IL [OFS 2008-2]
This report describes the geological and hydrogeological investigation of two sites in Jo Daviess County, Illinois proposed for 6850 animal unit capacity dairy facilities. The investigation included the potential for groundwater contamination.
Bedrock Geology of Kane County, Illinois (2007) [ICGM Kane-BG]
Map (1 sheet) showing the characteristics of the bedrock surface of Kane County, Illinois.
Chemical and isotopic database for McHenry County study on groundwater quality and land use (2007) [OFS 2007-6]
This document provides the database for an investigation of the effects of land use on groundwater quality in McHenry County.
comparison of potentiometric surfaces for the Cambrian-Ordovician aquifers of northeastern Illinois, 1995 and 2000., A (2002) [DCS-2002-02]
In response to expanding urban development, the use of Lake Michigan and other sources for public water supplies, and a growing interest in regional water resources development, this report provides a detailed discussion of groundwater withdrawals and water levels in northeastern Illinois. The water-level portion of this report covers a 15-county area from Lake Michigan to north-central Illinois and from the Wisconsin border south to Kankakee County. Particular emphasis, however, has been given to deep well pumpage in the eight counties of the Chicago region because of the significant shift in the late twentieth century from groundwater supplies of the deep bedrock aquifers to Lake Michigan and other sources. This report details the fall 2000 water-level measurement of wells reaching to the St.Peter and Ironton-Galesville sandstones (deep bedrock aquifers), provides a map illustrating the slope of groundwater levels, and compares the fall 2000 levels to the fall 1995 observations. The rapid decrease in groundwater pumpage from the deep bedrock aquifers during the 1980s initially resulted in a rapid recovery of groundwater levels. However, the rate of water-level change has slowed since the mid-1990s. The greatest recovery during the past five years occurred in Cook County. Groundwater levels in several wells were observed to have risen more than 50 feet since 1995. Where the deep bedrock aquifers of Cambrian-Ordovician age continue to be used, declines in groundwater levels were observed. Most notable declines were in southeastern Kane and northern Kendall Counties, southwestern Lake County, and southeastern McHenry County. Outside the Chicago region, water-level declines were observed in deep wells at Loves Park in Winnebago County and in the vicinity of DeKalb and Sycamore in DeKalb County.