NGWA has a series of information briefs on issues as they relate to groundwater. Please bookmark this page and check back for others as they become available.
In addition, NGWA has developed a series of information sheets that are available for the public that are available from this link.
Brackish water does not have an exact
definition, but it is typically defined as distastefully salty, but less
saline than seawater (between 1,000 to 10,000 ppm [parts per million] in
total dissolved solids [TDS]). In addition to certain surface water
settings such as estuaries, brackish water can be found in aquifers. In
some regions of the country with limited availability of freshwater,
desalination of brackish groundwater is being used as an alternative
supply. Read more about brackish groundwater.
NGWA invites others to join with it in recognizing that, given groundwater’s vast reserves and broad geographical distribution, its generally good quality, and its protection from seasonal fluctuations and contamination, groundwater holds the promise to ensure
future world communities an affordable and safe water supply. Further, by recognizing that both surface water and groundwater constitute essential resources, thoroughly integrated water resources management strategies will serve to enhance the security, reliability, and quality of the world’s water supplies. Read more about the global importance of groundwater.
The disposal of carbon dioxide (CO2) into
the subsurface via well injection, also known as geologic carbon
sequestration or carbon capture and storage (CCS), is one of a portfolio
of technologies under consideration as a viable approach to mitigating
greenhouse gas buildup. Recognizing that this option for carbon capture
holds great promise, it is important to understand it also has the
potential to endanger underground sources of drinking water if proper
safeguards are not taken. Read more about geologic carbon sequestration.
Agriculture requires a steady supply of water to meet crop and
livestock requirements, linking food security directly to water
security. Agriculture is the largest consumer of freshwater resources in
the world. Some countries do not have sufficient supplies of surface water to meet their agricultural demands, so groundwater is extracted to compensate for the difference. In the United States, about 65% of
groundwater withdrawals are for agricultural irrigation, which averages
an estimated 50 billion gallons of water per day. Read more about groundwater and agriculture.
Lead is a naturally occurring metal that does not alter the taste, odor,
or color of water. Due to the known health effects from lead exposure,
the U.S. Environmental Protection Agency has set regulations intended to
limit the amount of lead in drinking water. Water distributed by public
water systems is regulated via the Safe Drinking Water Act and the Lead
and Copper Rule.
Read more about lead presence in well systems.
Groundwater is a critical component of this nation’s water resources. Approximately 78 percentof
community water systems and nearly all rural water supplies use
groundwater. Groundwater is the source for 42 percent of the nation’s
agricultural irrigation water. Additionally, groundwater also feeds
streams and rivers, especially during periods of drought or low flow,
providing environmental benefits and sustaining ecosystem services. Read more about managed aquifer recharge.
This page was last updated on
800 551.7379 (614 898.7791 outside the United States)
8 a.m.-5 p.m. ET Monday through Friday
fax 614 898.7786
National Ground Water Association
601 Dempsey Rd.
Westerville, OH 43081
(614 898.7791 outside the US)
fax 614 898.7786