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:4/9/2015)... , April 9, 2015 Synaptics Inc. (NASDAQ: ... solutions, announced today that it will report financial results ... April 23, 2015, after the close of market. The ... and investors at 2:00 p.m. PT (5:00 p.m. ET), ... To participate on the live call, analysts and ...
(Date:4/2/2015)... 2015 According to preliminary estimates ... somewhat higher than 125 MSEK. This exceeds the guidance ... that revenues for Q1 2015 would be in line ... Q4 2014. The operating result for the first quarter ... interim report will as previously communicated be published on ...
(Date:3/31/2015)... 31, 2015   Guidepoint , a leading global ... Post-Surgical Pain Management TRACKER, part of the Guidepoint ... in the medical device and therapeutics markets. The Post-Surgical ... treatment volumes, market share, and adoption rates across three ... joint surgery. The Post-Surgical Pain Management TRACKER ...
Breaking Biology News(10 mins):Synaptics to Report Third Quarter Results on April 23 2Fingerprint Cards Revises Revenues for Q1 2015 2Guidepoint Launches Post-Surgical Pain Management TRACKER 2Guidepoint Launches Post-Surgical Pain Management TRACKER 3
... Scientists have determined that Helicobacter pylori, the bacterium that ... requires the vitamin B6 to establish and maintain chronic ... online journal mBio . This finding, along ... to utilize the vitamin, could lead to the development ...
... in academia bemoan the fact that their lifestyles do ... they would like. Surprisingly, male scientists harbor more regrets ... University sociologist Elaine Howard Ecklund. Ecklund and co-author ... of career, life outside work and the intersection of ...
... Georgia Institute of Technology has received a $10 million ... (NSF) to develop novel computing techniques for measuring and ... will be used to enable new approaches for identifying ... In addition, these methods may potentially improve the delivery ...
Cached Biology News:Rice sociologist finds male scientists regret parenthood decisions more than female counterparts 2Rice sociologist finds male scientists regret parenthood decisions more than female counterparts 3NSF awards $10M to develop computing techniques for measuring and analyzing child behavior 2NSF awards $10M to develop computing techniques for measuring and analyzing child behavior 3
(Date:4/30/2015)... Spirax Sarco, the leader in product solutions ... that for the first time in the company’s history ... Queen’s Award for Innovation – the UK’s highest accolade ... a unique flowmeter. , The Spirax Sarco TVA ... flow measurement. The device provides reliable, accurate and ...
(Date:4/30/2015)... , April 30, 2015   Tamir Biotechnology ... today an update on its Ebola antiviral therapy program. ... leading candidates, TMR004, is currently being evaluated and considered ... the battle against Ebola. During the first quarter of ... Leadership Meeting To Accelerate The Evaluation of Potential Treatments ...
(Date:4/30/2015)... MN , April 30, 2015 /PRNewswire/ - BioAmber ... producing sustainable chemicals, today announced that it has commenced an ... BioAmber expects to grant the underwriters a 30-day option ... the shares of common stock offered in the public ... there can be no assurance as to whether or ...
(Date:4/30/2015)... 30, 2015 Oxford Finance LLC ("Oxford"), a ... sciences and healthcare services companies, today announced the closing ... with Celula, Inc., a diagnostic testing company focused on ... patient care and improved outcomes.  Proceeds of the loan ... the commercialization of its products in the U.S. and ...
Breaking Biology Technology:Spirax Sarco Receives a Queen’s Award for Innovation 2Spirax Sarco Receives a Queen’s Award for Innovation 3Tamir Biotechnology Provides Update on TMR004 Development Against Mutating Ebola 2Tamir Biotechnology Provides Update on TMR004 Development Against Mutating Ebola 3Tamir Biotechnology Provides Update on TMR004 Development Against Mutating Ebola 4BioAmber Inc. Announces Public Offering Of Common Stock 2BioAmber Inc. Announces Public Offering Of Common Stock 3Oxford Finance Provides $10 Million Debt Financing to Celula 2
... Reportlinker.com announces that a new market ... Industrial Biotechnology China News ... In this issue, we present ... about biofuel, which include "Instruction for Industrial ...
... Mass., July 12, 2011 Comprendia, leading developer ... the life sciences, sponsored by molecular biology reagents ... an online resource that will support epigenetics research. ... implications for oncology, neurology, metabolism and disease mechanisms. ...
... 2011 , Elsevier, a ... products and services, today announced two new,collaboration ... ),a web-based tool focused on the evaluation ... research administrators the,flexibility to construct relevant contextual ...
Cached Biology Technology:Industrial Biotechnology China News 1106 2Industrial Biotechnology China News 1106 3Industrial Biotechnology China News 1106 4Comprendia and New England Biolabs Connect Epigenetics Scientists with New Social Media Application 2Comprendia and New England Biolabs Connect Epigenetics Scientists with New Social Media Application 3Elsevier Integrates New Collaboration Analysis Capabilities Into SciVal Strata to Further Enhance Research Evaluation 2Elsevier Integrates New Collaboration Analysis Capabilities Into SciVal Strata to Further Enhance Research Evaluation 3
... Protocol Development ,Probe Titer and ... DNA Screenings in Animal or ... Labeling of RNA / Protein ... and DNA Localization in Transgenic ...
Request Info...
... Quality ISO 9001:2000 Certified USDA Research ... Validated, SOP's Training AALAS Certified ... All Procedures GLP Documentation Upon Request ... shopping point for all your custom immunology ...
Request Info...
Biology Products: