Navigation Links
Chloride found at levels that can harm aquatic life in urban streams of the Northern US
Date:9/16/2009

streams in agricultural areas had chloride levels that exceeded the recommended federal criteria set to protect aquatic life (compared to more than 40 percent of urban streams). Overall, 15 percent of all streams had chloride levels exceeding the criteria.

Chloride concentrations in shallow groundwater (not used for drinking) were 16 times greater in urban areas than in forests, and 4 times greater in urban areas than in agricultural areas.

Highest levels in streams in the winter

In urban streams, the highest levels of chloride (as great as 4,000 parts per million, which is about 20 times higher than the recommended federal criteria) were measured during winter months when salt and other chemicals are used for deicing.

Increases over time

Increases in chloride levels in streams during the last two decades are consistent with overall increases in salt use in the U.S. for deicing.

Increasing chloride yields are linked to the expansion of road networks and parking lots that require deicing, increases in the number of septic systems, increases in wastewater discharge, and increases in saline groundwater from landfills.

Sources can vary locally

Chloride in ground and surface waters comes from many sources including the use and storage of salt for deicing roads, septic systems, wastewater treatment facilities, water softening, animal waste, fertilizers, discharge from landfills, natural sources of salt and brine in geologic deposits, and from natural and human sources in precipitation.


'/>"/>

Contact: John Mullaney
jmullane@usgs.gov
860-291-6760
United States Geological Survey
Source:Eurekalert

Page: 1 2

Related biology news :

1. Exotic timber plantations found to use more than twice the water of native forests
2. Anticancer compound found in American mayapple
3. Shifting baselines confound river restoration
4. NTU and Temasek Foundation transfer technology knowhow to Chinas quake-prone regions
5. Newly found DNA catalysts cleave DNA with water molecule
6. Essential nutrient found in eggs may help lower risk of neural tube defects
7. Little-known protein found to be key player
8. 121 breeding tigers estimated to be found in Nepal
9. Possible drug target found for one of the most aggressive breast cancers
10. Will IVF work for a particular patient? The answer may be found in her blood
11. UTSA wins San Antonio Area Foundation grant to further chlamydia research
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/19/2015)... 19, 2015 Research ... addition of the  "Genetic Testing Market Outlook ... http://photos.prnewswire.com/prnh/20130307/600769) , ,A recent report, Genetic Testing ... of the current and future genetic testing ... their working principles and types are covered ...
(Date:5/11/2015)... Calif. , May 11, 2015  Synaptics ... of human interface solutions, today announced the appointment ... President and Chief Financial Officer, reporting to ... replaces Synaptics, current Chief Financial Officer, Kathleen ... 2014. Mr. Ali brings extensive ...
(Date:5/8/2015)... JOSE, Calif. , May 8, 2015 Synaptics ... interface solutions, today announced that members of the executive management ... J.P. Morgan 43rd Annual Technology, Media and Telecom Conference ... Waterfront Hotel in Boston, MA ... May 27, 2015 Time: 2:45pm ET Location: The New York ...
Breaking Biology News(10 mins):Global Genetic Testing Market Outlook 2018 2Synaptics Appoints Wajid Ali as Senior Vice President and Chief Financial Officer 2Synaptics to Present at Upcoming Investor Conferences 2
... a consortium of 98 Ph.D.-granting universities, has selected Holly ... of Delaware,s College of Earth, Ocean, and Environment, to ... The competitive award, which provides $5,000 from ORAU ... university, is intended to enrich the research and educational ...
... scientists discovered a defect in cellular pathways that provides a ... in newborns, known as craniosynostosis. Mutations of the ... events that regulate bone formation at the stem cell level, ... journal Science Signaling . "Our work contributes to ...
... O157:H7 is present but rare in some wildlife species of ... to as the nation,s "salad bowl," reports a team or ... who are nearing completion of a massive field study to ... near Central Coast farms, presented their findings today during the ...
Cached Biology News:University of Delaware professor wins Powe Award from Oak Ridge Associated Universities 2University of Delaware professor wins Powe Award from Oak Ridge Associated Universities 3Stem-cell disruption induces skull deformity, UR study shows 2E. coli 0157:H7 present but not common in wildlife of nation's salad bowl 2E. coli 0157:H7 present but not common in wildlife of nation's salad bowl 3
(Date:5/22/2015)... -- Baylor Research Institute (BRI) at ... (TGen) in Phoenix, AZ , today ... and treatments for patients with a broad range of cancers. ... new clinical trials and access to technology to drive the ... to bedside across Baylor Scott & White Health,s ...
(Date:5/21/2015)... YORK , May 21, 2015  Prima Biomed ... company that is striving to become a leader in ... cancer, recently announced that the final CVac data from ... shown a clear trend for a clinically meaningful improvement ... in second remission patients. In the group ...
(Date:5/21/2015)... 2015 Patent Offering, The patent’s technology ... or therapeutic imaging within a body lumen (open space). ... having a low cost, single-use disposable illumination and camera ... October 18, 2013 and the patent approval was received ... physician to customize the lighting and magnification of the ...
(Date:5/21/2015)... (PRWEB) May 21, 2015 Veolia’s ... an exclusive North American distribution agreement with VWR ... system. , With more than 160 years of ... and services for laboratory and production facilities, has ... excellence and differentiated services to enable science. ...
Breaking Biology Technology:Precision Medicine Collaboration to Increase Options for Cancer Patients 2Precision Medicine Collaboration to Increase Options for Cancer Patients 3Precision Medicine Collaboration to Increase Options for Cancer Patients 4Correction Continues after Big Move - BrokerBank Securities, Inc. 2IpAuctions™ Presents The Worlds Smallest Disposable Illuminated Endoscope For Auction 2IpAuctions™ Presents The Worlds Smallest Disposable Illuminated Endoscope For Auction 3Veolia’s TECTA™ B16 Instrument for E. Coli Detection is Offered Exclusively Through VWR 2
... and you haven,t backed up your holiday photos is a step ... into a new kind of computer memory. , Physicists at ... have made new advances in researching a new kind of memory, ... information on home computers. , Your hard drive ...
... companies align to leverage technologies for PACS data disaster ... Management (IKM) business unit of Siemens Healthcare ... and Harris Corporation ( www.harris.com ... providers affordable solutions critical for Picture Archiving and Communication ...
... April 3 Verenium Corporation (Nasdaq: ... high-performance specialty enzymes and next-generation cellulosic ethanol, today ... demonstration-scale facility in Jennings, Louisiana, and the recent ... Verenium is now consolidating its research and development ...
Cached Biology Technology:Beating the back-up blues 2Siemens Healthcare Announces Planned Collaboration with Harris Corporation 2Siemens Healthcare Announces Planned Collaboration with Harris Corporation 3Siemens Healthcare Announces Planned Collaboration with Harris Corporation 4Verenium Announces Organizational Changes 2Verenium Announces Organizational Changes 3
... CultureWell cell culture chambered coverslips ... cells for staining and imaging. ... silicone gaskets with standard optical-quality ... and ready to use. Preassembled ...
Vybrant® Multidrug Resistance Assay Kit...
... mL - 25 mL pipets ,Angled acrylic pipet ... standard square or round pipet cans. Constructed of 6 ... 76 mm W x 76 mm H x 289 ... Overall dimensions: 89 mm W x 406 mm H ...
...
Biology Products: