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:9/30/2014)... Pollution in urban and farm runoff in Hawaii is ... finds. , The study, published Tuesday in the ... in the runoff ends up in algae that the ... animals, eyes, flippers and internal organs. , Scientists at ... Oceanic and Atmospheric Administration (NOAA) conducted the study to ...
(Date:9/30/2014)... . , Animals ... such as exposure to predators. Researchers from the Max ... study on different populations of great tits that risk-taking ... High metabolic rates and low temperatures were associated with ... more likely to approach potential predators. , The readiness ...
(Date:9/29/2014)... of gut bacteria called Clostridium ramosum , coupled with ... work is published this week in mBio , the ... , A research team from the German Institute of Human ... bacteria including C. ramosum gained weight when fed ... ramosum were less obese even when consuming a high-fat ...
Breaking Biology News(10 mins):Pollution linked to lethal sea turtle tumors 2Pollution linked to lethal sea turtle tumors 3Risky metabolism 2Gut bacteria promote obesity in mice 2
... NIH-supported scientists will be presenting their latest research findings ... Research in Otolaryngology (ARO). When: February 19-23, 2011 ... Additional Information: Research topics to be presented by scientists ... Communication Disorders (NIDCD) will include: Deafness ...
... will disappear by 2200 as a result of warming ... says a new study by the University of Colorado ... The carbon resides in permanently frozen ground ... warming temperatures, which will impact not only the climate ...
... Scientists are reporting for the first time that ... potential to act as endocrine disruptors, which can interfere ... is not caused by microcystin toxins, long recognized as ... yet unidentified substances. As a result, the scientists are ...
Cached Biology News:NIDCD research at ARO Midwinter Meeting 2NIDCD research at ARO Midwinter Meeting 3NIDCD research at ARO Midwinter Meeting 4NIDCD research at ARO Midwinter Meeting 5NIDCD research at ARO Midwinter Meeting 6NIDCD research at ARO Midwinter Meeting 7Thawing permafrost likely will accelerate global warming 2Thawing permafrost likely will accelerate global warming 3
(Date:10/2/2014)... New York (PRWEB) October 02, 2014 ... to announce funding received to investigate therapeutics directed ... disease. A grant award from the Small Business ... (NIA), National Institutes of Health (NIH) is entitled ... Therapeutics." The company also received a SBIR Matching ...
(Date:10/2/2014)... MO (PRWEB) October 02, 2014 Permian ... business in the St. Louis, Missouri, area on October ... has become a leading plastic injection molder in the ... machines and is a supplier to many Fortune 500 ... customer support every step of the way, from concept ...
(Date:10/2/2014)... 02, 2014 At a time when many ... has introduced a new kind of squeeze aimed at ... the Scienceware® Squeeze Rite™ Wash Bottle , catalog no. ... within the bottle reduces the waste of reagents, solutions and ... liquids. , “Easier to squeeze when compared to standard 500ml ...
(Date:10/2/2014)...  NKT Therapeutics today announced that the U.S. ... designation to NKTT120, the company,s lead therapeutic being ... NKTT120 is a humanized monoclonal antibody that specifically ... has been demonstrated to be a key mediator ... cell disease.  Fast Track designation is intended to ...
Breaking Biology Technology:Gismo Therapeutics Inc. Awarded Grants to Develop New Alzheimer's Disease Therapeutics 2Gismo Therapeutics Inc. Awarded Grants to Develop New Alzheimer's Disease Therapeutics 3Permian Plastics LLC Celebrates 20 Years As Leading Manufacturer of Plastic Molds 2New Wash Bottle Reduces Waste of Reagents, Solutions, and Other Liquids 2FDA Grants Fast Track Designation to NKT Therapeutics' NKTT120 for the Treatment of Sickle Cell Disease 2
... article profiling the significant rise in valuation of ... is true product innovation through focused R&D efforts that's currently ... valuation. , ,While Genentech had revenues of $4.6 billion in ... ,This surpasses Amgen's top position of $72.2 billion, is pretty ...
... and the Endpoint Exchange Network said on Tuesday ... be able to exchange check data and images, starting with ... an IT service provider claiming 4,000 financial clients. Endpoint Exchange ... Metavante , the technology arm of Marshall & Ilsley ...
... Corp. said on Wednesday it has agreed to buy ... spinoff, for $600 million in cash. , ,Bone Care and ... $2 billion and almost 7,000 employees worldwide, plan to complete ... reported healthy quarterly profits and revenues. Bone Care tallied its ...
Cached Biology Technology:Drug innovation beats marketing, patents and mergers 2Massachusetts firm to buy UW spinoff Bone Care for $600 million 2Massachusetts firm to buy UW spinoff Bone Care for $600 million 3
S. O'Hare & C.K. Atterwill • In vitro toxicity techniques for regular lab use. Ex vivo techniques are also covered with the aim of reducing and refining the use of animals in the future....
Form: Ready to use Applications: ELISA...
Form: Ready to use Applications: ELISA...
X-prolyl aminopeptidase (aminopeptidase P) 1, soluble...
Biology Products: