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

Levels of chloride, a component of salt, are elevated in many urban streams and groundwater across the northern U.S., according to a new government study.

Chloride levels above the recommended federal criteria set to protect aquatic life were found in more than 40 percent of urban streams tested. The study was released today by the U.S. Geological Survey (USGS). Elevated chloride can inhibit plant growth, impair reproduction, and reduce the diversity of organisms in streams.

The effect of chloride on drinking-water wells was lower. Scientists found chloride levels greater than federal standards set for human consumption in fewer than 2 percent of drinking-water wells sampled in the USGS study.

Use of salt for deicing roads and parking lots in the winter is a major source of chloride. Other sources include wastewater treatment, septic systems, and farming operations.

"Safe transportation is a top priority of state and local officials when they use road salt. And clearly salt is an effective deicer that prevents accidents, saves lives, and reduces property losses," said Matthew C. Larsen, USGS Associate Director for Water. "These findings are not surprising, but rather remind us of the unintended consequences that salt use for deicing may have on our waters. Transportation officials continue to implement innovative alternatives that reduce salt use without compromising safety."

This comprehensive study examines chloride concentrations in the northern U.S. covering parts of 19 States, including 1,329 wells and 100 streams.

Selected Highlights

Land use matters

Chloride yields (the amount of chloride delivered per square mile of drainage area) were substantially higher in cities than in farmlands and forests. Urban streams carried 88 tons of chloride per square mile of drainage area. Forest streams carried about 6 tons of chloride per square mile.

Only 4 percent of the
'/>"/>

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:7/29/2014)... two of the major disciplines behind Jurassic Park is ... stunning photographs and unique illustrations. , Fossil Insects, by ... incredible preservation and diversity of fossilised insects from around ... fossils can tell us about the ancient and modern ... the mosquito in Jurassic Park, many of the hundreds ...
(Date:7/28/2014)... Food and Drug Administration (FDA) for other purposes can ... human cells, including those that cause Legionnaires, disease, brucellosis, ... mBio , the online open-access journal of the American ... non-antibiotic drugs that could one day help curb bacterial ... list inhibit the growth of at least three of ...
(Date:7/28/2014)... people in the United States have a circulatory problem ... be painful and may even require surgery in serious ... wasting and, in turn, limb amputation. , At The ... Medical School, scientists tested a non-surgical preventative treatment in ... associated with increased blood circulation. Their proof-of-concept study ...
Breaking Biology News(10 mins):Unique images bring fossil insects back to life 2New route to identify drugs that can fight bacterial infections 2Scientists discover genetic switch that can prevent peripheral vascular disease in mice 2
... what "American Idol" is for young performers, and a pair ... IShow finale in Palm Desert, Calif., this weekend. If ... Mechanical Engineers Innovation Showcase, also known as the IShow, on ... Xu, who both work at the Abramson Center for the ...
... measure leaf wetness, soil moisture and temperature are ... precinct in south-east Queensland. The CSIRO ... conditions favourable for rapid natural regeneration of degraded ... nodes, connected wirelessly, has been sampling parameters such ...
... individuals and leave telltale signs of our presence on ... really for? According to Roland Ennos, from the University ... and some South American monkeys have ridged pads on ... there to help us hang onto objects that we ...
Cached Biology News:Promising device snags young inventors coveted spot at IShow 2Promising device snags young inventors coveted spot at IShow 3Rainforest rehab in every sense 2Urban myth disproved: Fingerprints do not improve grip friction 2
(Date:7/28/2014)... (PRWEB) July 28, 2014 The Workgroup ... authority on the use of health IT to create ... Health Plan Identifier (HPID) Workgroup has developed an ... Health Plan and Payer?” The HPID Workgroup, a part ... with the Centers for Medicare and Medicaid Services (CMS) ...
(Date:7/28/2014)... 28, 2014 Proove Biosciences , ... be exhibiting data and research conducted through their latest ... Intervention Society’s (ISIS) 22nd Annual Scientific Meeting. The ... Hyatt Regency, in Orlando, Florida. , The ... competence of physicians who care for patients suffering specificity ...
(Date:7/28/2014)... 2014 According to ... (Consumables, Instruments, Services), Methods (Phenotypic, Genotypic), Applications (Pharmaceutical, Diagnostic, ... Characterization) - Global Forecasts to 2019" published ... estimated at $896.5 Million in 2014 and ... 2019, growing at a CAGR of 5.9% ...
(Date:7/28/2014)... , July 28, 2014   Propeller Health ... disease, announced the hire of Brad Towle ... will be responsible for driving the company,s sales growth, ... experience in healthcare, and specifically his past role in ... to the company at this pivotal time in the ...
Breaking Biology Technology:WEDI’s HPID Workgroup Announces Release of Issue Brief: “What is the Difference Between a Health Plan and Payer?” 2Proove Biosciences Exhibits Industry Leading Data and Research at International Spine Intervention Society’s 22nd Annual Scientific Meeting 2Microbial Identification Market worth $1,194.1 Million by 2019 2Microbial Identification Market worth $1,194.1 Million by 2019 3Propeller Health Hires Brad Towle as Senior Vice President of Business and Client Development 2
... tiny, hair-like blood vessels in the back of our ... vessels like those that bring blood to the heart respond ... revealed that otherwise healthy people exposed to high levels of ... higher risk of heart disease. Previous studies linked pollution ...
... the Georgia Institute of Technology has developed a ... how space vehicles and instruments are designed. The ... which can produce electronics that are highly resistant ... Titled "SiGe Integrated Electronics for Extreme Environments," ...
... TECHBREAK is a new foresight initiative led by the ... could benefit the space sector. It goes beyond space-related ... is evolving faster, ranging from photonics and nanotechnology to ... open up new fields of research and give scientists ...
Cached Biology Technology:Photos of tiny blood vessels in the eye link air pollution to heart disease 2Project pioneers use of silicon-germanium for space electronics applications 2Project pioneers use of silicon-germanium for space electronics applications 3Project pioneers use of silicon-germanium for space electronics applications 4Project pioneers use of silicon-germanium for space electronics applications 5Bridging between Earth and space: technology breakthroughs for scientific progress 2
Request Info...
, Premium quality synthesis and purification , You provide the sequence, we'll do the rest , Rigorous quality control , Your choice of purification method, amount and format , Available annealed...
, Premium quality synthesis and purification , You provide the sequence, we'll do the rest , Rigorous quality control , Your choice of purification method, amount and format , Available annealed...
... custom siRNA service provides the premium quality ... research. Custom siRNAs can be readily ordered ... target sequence, or by providing the sense ... Ambion's Silencer Validated and ...
Biology Products: