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:4/21/2014)... lower cholesterol can reduce heart attack and stroke risk, ... save the vision of diabetics, scientists say. , In ... of niacin to decrease bad cholesterol levels and raise ... for these patients, said Dr. Pamela Martin, biochemist at ... , Martin is Principal Investigator on a new ...
(Date:4/20/2014)... 20, 2014) A team of researchers from ... College, and Brandeis University has devised a wholly ... involving the so-called retromer protein complex. Retromer plays ... protein (APP) away from a region of the ... toxic byproduct amyloid-beta, which is thought to contribute ...
(Date:4/20/2014)... Although doctors have long known that people with Down ... leukemia (ALL) during childhood, they haven,t been able to ... Institute investigators has uncovered a connection between the two ... the journal Nature Genetics , the researchers track ... abnormality in Down syndrome to the cellular havoc that ...
Breaking Biology News(10 mins):Scientists target receptor to treat diabetic retinopathy 2Scientists target receptor to treat diabetic retinopathy 3'Chaperone' compounds offer new approach to Alzheimer's treatment 2'Chaperone' compounds offer new approach to Alzheimer's treatment 3Dana-Farber researchers uncover link between Down syndrome and leukemia 2Dana-Farber researchers uncover link between Down syndrome and leukemia 3
... La Jolla, CA - Salk Institute professor Terrence J. ... the neural networks revolution in computing in the 1980s, ... of Sciences. The Academy made the announcement today during ... the Academy recognizes distinguished and continuing achievements in original ...
... CARSON CITY, Nev. , April 27 State of ... by participating in The Prevention Plan™, a U.S. Preventive Medicine® program designed to ... before they progress. The program is projected to save Nevada ... , , ...
... , ATLANTA , April 27   Georgia Power received approval April 20 ... more solar options. , , , ... , , ... to include the following: , , , ...
Cached Biology News:Salk scientist Terrence Sejnowski elected to National Academy of Sciences 2U.S. Preventive Medicine Helps Participants of the State of Nevada Public Employees' Benefits Program (PEBP) Become Healthier 2U.S. Preventive Medicine Helps Participants of the State of Nevada Public Employees' Benefits Program (PEBP) Become Healthier 3Georgia Power's Green Energy Program Redesigned to Include More Solar Power 2
(Date:1/15/2014)... (PRWEB) January 15, 2014 Freeslate, ... solutions, today announced that Lupin Limited, one of India’s ... CM Protégé PharmD System for high throughput ... India, is focused on a wide range of quality, ...
(Date:1/14/2014)... (PRWEB) January 14, 2014 Histogen, Inc., ... products of cells grown under simulated embryonic conditions, today ... agreement with Suneva Medical, Inc. for physician-dispensed aesthetic products ... , This agreement is an amendment to the ...
(Date:1/14/2014)... BETHESDA, Md. , Jan. 14, 2014  Organovo announced ... from the National Institutes of Health (NIH) to help ... effective treatments to patients on a faster timeline. Organovo ... Sciences (NCATS) and the National Eye Institute (NEI) to ...
(Date:1/14/2014)... OTTAWA, Ontario , Jan. 14, 2014   Kinaxis ®, ... ( SCM ) and sales and operations planning ( S&OP ... the Biomanufacturing Summit , which will be held at ...  At the conference, join Kinaxis customer Elisabeth Kaszas , ...
Breaking Biology Technology:Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 2Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 3Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 2Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 3Organovo Announces Collaboration with National Institutes of Health 2Organovo Announces Collaboration with National Institutes of Health 3Event Alert: Kinaxis Customer to Present at the Biomanufacturing Summit "Supply Chain: Improving Network Effectiveness" 2
... Tumors Associated ... with HER2-Positive Breast Cancer, SAN ANTONIO, Texas, Dec. ... a Phase II study on its,first-in-class, oral small molecule HER2 ... the combination of,TYKERB plus capecitabine (Xeloda(R)) showed a reduction in ...
... - Vasogen Inc.,(NASDAQ: VSGN ; TSX:VAS) and ... pharmaceutical and medical devices company, today,announced the ... System,in Germany. Celacade, a first-in-class therapy, is ... targets the destructive chronic,inflammation underlying the development ...
... Mednet, SWOG Will Enhance Quality and Speed Image Transfer at ... Cost While Ensuring 21 CFR Part 11 ... largest,diagnostic imaging network, today announced it has been selected by,Southwest ... trials cooperative groups in the United States, to provide a,secure, ...
Cached Biology Technology:GlaxoSmithKline Announces Data on TYKERB(R) (Lapatinib) Plus Capecitabine for the Treatment of HER2 Positive Breast Cancer Brain Metastases 2GlaxoSmithKline Announces Data on TYKERB(R) (Lapatinib) Plus Capecitabine for the Treatment of HER2 Positive Breast Cancer Brain Metastases 3GlaxoSmithKline Announces Data on TYKERB(R) (Lapatinib) Plus Capecitabine for the Treatment of HER2 Positive Breast Cancer Brain Metastases 4GlaxoSmithKline Announces Data on TYKERB(R) (Lapatinib) Plus Capecitabine for the Treatment of HER2 Positive Breast Cancer Brain Metastases 5GlaxoSmithKline Announces Data on TYKERB(R) (Lapatinib) Plus Capecitabine for the Treatment of HER2 Positive Breast Cancer Brain Metastases 6Vasogen and Grupo Ferrer Announce Initial Roll-out of Celacade - New Therapy for Chronic Heart Failure 2Vasogen and Grupo Ferrer Announce Initial Roll-out of Celacade - New Therapy for Chronic Heart Failure 3Vasogen and Grupo Ferrer Announce Initial Roll-out of Celacade - New Therapy for Chronic Heart Failure 4Vasogen and Grupo Ferrer Announce Initial Roll-out of Celacade - New Therapy for Chronic Heart Failure 5AG Mednet to Provide Image Network for Southwest Oncology Group 2
... advanced protein cross-linking techniques are defined by ... Shan S. Wong. This valuable hardcover guide ... and current application references. More than 300 ... cross-linking and conjugate preparation from selection ...
... The proteomic service includes protein separation ... using the PDQuest software package from ... mass spectrometry. In order to meet ... preparation, data analysis and format of ...
... provides reagents for immune complex disruption (ICD) ... samples using a combination of low pH ... and transferred to microplate wells which are ... antibody to HIV-1 p24. The immobilized monoclonal ...
... endotoxin-free plasmid DNA preparations are prepared ... quantities from 1mg to multi-gram scales. ... customer needs, and glycerol stocks are ... Transformation, clonal selection (Clonal selection includes ...
Biology Products: