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| Subject:
Impaired groundwater
Category: Miscellaneous Asked by: blucken-ga List Price: $200.00 |
Posted:
01 Mar 2005 05:00 PST
Expires: 31 Mar 2005 05:00 PST Question ID: 482814 |
What is the volume or percent of groundwater in the US which is impaired? (may have contaminants, brackish or high saline, etc.) Any similar data for Europe or Asia? | |
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Re: Impaired groundwater
Answered By: bobbie7-ga on 02 Mar 2005 16:39 PST Rated:  |
Dear Blucken, I'm delighted that my findings meet your requirements. I will repost them below to make the answer official. Best regards, Bobbie7 ---------------------------------------------------------------------------- ?About 10 percent of ground water wells supplying drinking water systems are contaminated with man-made chemicals--an estimated 3 percent at levels above EPA health standards. ? 1995 SENATE Report http://thomas.loc.gov/cgi-bin/cpquery/0?&&dbname=cp104&&&r_n=sr169.104&&sel=DOC& ---------------------------------------------------------------------------- ?Studies show that 58 percent of ground water sampled in the country is contaminated with coliform and needs treatment.? DOH: Ground water not safe to drink (June 24, 2004) http://www.globalpinoy.com/news/national/06242004/natl3.htm ---------------------------------------------------------------------------- ? 98 out of the 7152 (1.4%) public use groundwater sources exceeded the EPA limit of 50 ppb. Although this percentage may seem low, the number of states with public use groundwater sources exceeding 50 ppb is 14 out of the 59 states. This may be an indication of how widespread the groundwater arsenic contamination is throughout the United States.? GIS Aided Characterization of Groundwater Arsenic Contamination in The United States http://www.crwr.utexas.edu/gis/gishydro01/Class/trmproj/tugin/termproject.html ---------------------------------------------------------------------------- ?In 2001, the U.S. Geological Survey (USGS) reported that MTBE was detected in approximately 5 percent of ground water samples across the U.S. However, less that one percent of the samples exceeded the EPA consumer advisory concentration of 20 micrograms per litre (approximately equal to 20 ppb)? Environment Canada http://www.ec.gc.ca/CEPARegistry/documents/part/MTBE/MTBEReport_p2.cfm ---------------------------------------------------------------------------- ?. . about 20 to 25 percent of ground water sources are contaminated with pathogenic viruses or bacteria.? Frequently Asked Questions Prepared by: National Ground Water Association http://www.ngwa.org/public/bac_faq.html ---------------------------------------------------------------------------- ?EPA estimates that 10.4 percent of the community water system wells and 4.2 percent of the rural domestic wells in the U.S. contain at least one pesticide or pesticide breakdown product, with 0.8 percent and 0.6 percent respectively found to exceed EPA's health advisory levels (HALs) or maximum contaminant levels (MCLs). Nitrate was found in 52.1 percent of the community well systems and 57 percent of the rural domestic wells, with MCLs being exceeded in 1.2 percent and 2.4 percent of the samples respectively.? Published by: North Carolina Cooperative Extension Service http://www.bae.ncsu.edu/programs/extension/publicat/wqwm/ag441_5.html -------------------------------------------------------------------------------- California ?The agency most responsible for monitoring the state's groundwater supplies -- the California State Water Resources Control Board -- reported last year that as much as 40 percent of the state's groundwater supply was impaired by pollution or threatened with impairment.? http://www.nrdc.org/media/pressReleases/010426.asp -------------------------------------------------------------------------------- Rhode Island ?Over 90% of the state's groundwater is considered suitable for drinking water use.? http://www.state.ri.us/dem/programs/benviron/water/quality/ -------------- Worldwide -------------- ?A Global Sampler of Groundwater Pollution India's Central Pollution Control Board surveyed 22 major industrial zones in the late-1990s and found that groundwater in every one of them was unfit for drinking.? ?In the northern Chinese provinces of Beijing, Tianjin, Hebei, and Shandong, nitrate concentrations in groundwater exceeded the health guideline in more than half of the locations studied in 1995.? ?In Mexico's Yucatan Peninsula, more than half of groundwater sampled contained nitrate at levels above the safe limit.? ?In Romania and Moldova, more than 35 percent of the sites sampled in the mid-1990s had nitrate concentrations higher than the health guideline.? ? Researchers in the Netherlands found that 28 percent of groundwater used for drinking contained perchlorate, a solvent used widely in dry cleaning, at levels greater than 10 micrograms per liter.? ?A survey of 15 Japanese cities found that 30 percent of all groundwater supplies contained varying levels of chlorinated solvents, although just 3 percent were above prescribed limits.? ? In Manila, where groundwater levels have fallen 50-80 meters because of overdraft, seawater has flowed 5 kilometers inland, contaminating the city's aquifer with salt. Just 2 percent of seawater mixed with freshwater makes the water unusable for drinking or irrigation.? ?In Bangkok, Thailand, many wells have been abandoned because of saltwater intrusion.? Worldwatch Paper #154: Deep Trouble: The Hidden Threat of Groundwater Pollution 55 pages December 2000 http://www.worldwatch.org/pubs/paper/154/ ---------------------------------------------------------------------------- France Orders Withdrawal of Pesticides ?According to a report by the French environment ministry, atrazine products were found in 50 percent of surface water samples and 52 percent of ground water samples.? Daily News Archive From October 2, 2001 http://www.beyondpesticides.org/news/daily_news_archive/2001/10_02_01.htm ---------------------------------------------------------------------------- |
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| Subject:
Re: Impaired groundwater
From: bobbie7-ga on 01 Mar 2005 07:39 PST |
Dear Blucken, Please review the following information. If my findings meet your needs, please let me know and I will gladly post it as the official answer to your question. Thanks, Bobbie7 Google Answers Researcher ?About 10 percent of ground water wells supplying drinking water systems are contaminated with man-made chemicals--an estimated 3 percent at levels above EPA health standards. ? 1995 SENATE Report http://thomas.loc.gov/cgi-bin/cpquery/0?&&dbname=cp104&&&r_n=sr169.104&&sel=DOC& ---------------------------------------------------------------------------- ?Studies show that 58 percent of ground water sampled in the country is contaminated with coliform and needs treatment.? DOH: Ground water not safe to drink (June 24, 2004) http://www.globalpinoy.com/news/national/06242004/natl3.htm ---------------------------------------------------------------------------- ? 98 out of the 7152 (1.4%) public use groundwater sources exceeded the EPA limit of 50 ppb. Although this percentage may seem low, the number of states with public use groundwater sources exceeding 50 ppb is 14 out of the 59 states. This may be an indication of how widespread the groundwater arsenic contamination is throughout the United States.? GIS Aided Characterization of Groundwater Arsenic Contamination in The United States http://www.crwr.utexas.edu/gis/gishydro01/Class/trmproj/tugin/termproject.html ---------------------------------------------------------------------------- ?In 2001, the U.S. Geological Survey (USGS) reported that MTBE was detected in approximately 5 percent of ground water samples across the U.S. However, less that one percent of the samples exceeded the EPA consumer advisory concentration of 20 micrograms per litre (approximately equal to 20 ppb)? Environment Canada http://www.ec.gc.ca/CEPARegistry/documents/part/MTBE/MTBEReport_p2.cfm ---------------------------------------------------------------------------- ?. . about 20 to 25 percent of ground water sources are contaminated with pathogenic viruses or bacteria.? Frequently Asked Questions Prepared by: National Ground Water Association http://www.ngwa.org/public/bac_faq.html ---------------------------------------------------------------------------- ?EPA estimates that 10.4 percent of the community water system wells and 4.2 percent of the rural domestic wells in the U.S. contain at least one pesticide or pesticide breakdown product, with 0.8 percent and 0.6 percent respectively found to exceed EPA's health advisory levels (HALs) or maximum contaminant levels (MCLs). Nitrate was found in 52.1 percent of the community well systems and 57 percent of the rural domestic wells, with MCLs being exceeded in 1.2 percent and 2.4 percent of the samples respectively.? Published by: North Carolina Cooperative Extension Service http://www.bae.ncsu.edu/programs/extension/publicat/wqwm/ag441_5.html -------------------------------------------------------------------------------- California ?The agency most responsible for monitoring the state's groundwater supplies -- the California State Water Resources Control Board -- reported last year that as much as 40 percent of the state's groundwater supply was impaired by pollution or threatened with impairment.? http://www.nrdc.org/media/pressReleases/010426.asp -------------------------------------------------------------------------------- Rhode Island ?Over 90% of the state's groundwater is considered suitable for drinking water use.? http://www.state.ri.us/dem/programs/benviron/water/quality/ -------------- Worldwide -------------- ?A Global Sampler of Groundwater Pollution India's Central Pollution Control Board surveyed 22 major industrial zones in the late-1990s and found that groundwater in every one of them was unfit for drinking.? ?In the northern Chinese provinces of Beijing, Tianjin, Hebei, and Shandong, nitrate concentrations in groundwater exceeded the health guideline in more than half of the locations studied in 1995.? ?In Mexico's Yucatan Peninsula, more than half of groundwater sampled contained nitrate at levels above the safe limit.? ?In Romania and Moldova, more than 35 percent of the sites sampled in the mid-1990s had nitrate concentrations higher than the health guideline.? ? Researchers in the Netherlands found that 28 percent of groundwater used for drinking contained perchlorate, a solvent used widely in dry cleaning, at levels greater than 10 micrograms per liter.? ?A survey of 15 Japanese cities found that 30 percent of all groundwater supplies contained varying levels of chlorinated solvents, although just 3 percent were above prescribed limits.? ? In Manila, where groundwater levels have fallen 50-80 meters because of overdraft, seawater has flowed 5 kilometers inland, contaminating the city's aquifer with salt. Just 2 percent of seawater mixed with freshwater makes the water unusable for drinking or irrigation.? ?In Bangkok, Thailand, many wells have been abandoned because of saltwater intrusion.? Worldwatch Paper #154: Deep Trouble: The Hidden Threat of Groundwater Pollution 55 pages December 2000 http://www.worldwatch.org/pubs/paper/154/ ---------------------------------------------------------------------------- France Orders Withdrawal of Pesticides ?According to a report by the French environment ministry, atrazine products were found in 50 percent of surface water samples and 52 percent of ground water samples.? Daily News Archive From October 2, 2001 http://www.beyondpesticides.org/news/daily_news_archive/2001/10_02_01.htm ---------------------------------------------------------------------------- |
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