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:10/17/2014)... of Copenhagen have shown for the first time how ... fibrosis patients, giving them the opportunity to get tremendous ... , The study also discovered the bacterial growth in ... halted or slowed down by the immune cells. The ... and helped "suffocate" the bacteria, forcing the bacteria to ...
(Date:10/16/2014)... the bowel lining develops and, in the process, suggested ... The researchers produced evidence that stem cells are responsible ... feature of the bowel lining, and believe these stem ... finding as scientists are still divided on the stem ... Wee Tan and Professor Tony Burgess from the Walter ...
(Date:10/15/2014)... PORT WASHINGTON, N.Y. , Oct. 15, 2014 ... in technology solutions for home and community-based care, ... the benefits of implementing Sandata,s Santrax® Electronic Visit ... Quality Care Services is a home health company ... Texas . ...
Breaking Biology News(10 mins):Scientists opens black box on bacterial growth in cystic fibrosis lung infection 2Cryptic clues drive new theory of bowel cancer development 2Sandata Announces Case Study with Quality Care Services, Inc. 2
... 2008) Bison can repopulate large areas from Alaska ... series of conservation and restoration measures are taken, according ... Wildlife Conservation Society and other groups. The assessment ... ranchers, and Native Americans/First Nations peoples, and appears in ...
... neurotoxin responsible for the deadly food poisoning disease ... facial wrinkles can also be used as a ... a billionth of an ounce can cause muscle paralysis ... exposure can inhibit the destructive action of this neurotoxin ...
... to turning plants into biofactories capable of producing oils ... manufacture a range of products. ,Scientists working within ... Initiative (CBI) have achieved a major advance by accumulating ... in the model plant, Arabidopsis. UFAs are usually ...
Cached Biology News:Bison can thrive again, study says 2Scientists determine drug target for the most potent botulinum neurotoxin 2Boost for 'green plastics' from plants 2
(Date:10/22/2014)... (PRWEB) October 21, 2014 The ... the inorganic refrigerants market in Americas with analysis ... TOC of the Americas Inorganic Refrigerants Market report, ... provided. This also provides a glimpse of the ... is supported by various tables and figures. ...
(Date:10/22/2014)... (PRWEB) October 21, 2014 Shimadzu Scientific ... LC/MS/MS data tool for the pain management and clinical ... data processing and review by allowing users to highlight ... clinicians. , QuantAnalytics allows analysts to filter results ... expedites data processing by eliminating the need to sift ...
(Date:10/22/2014)... WriteResult, LLC – a premier ... working with a team of researchers from Yale University’s ... Farming Collaborative to provide electronic questionnaire data collection through ... which started in May, aims to evaluate the impact ... exposure to and participation in urban agriculture to impact ...
(Date:10/22/2014)... UAE (PRWEB) October 22, 2014 Grace ... science and healthcare projects, announces the addition of ... DCH to its advisory team. Dr. Siddiqui will provide ... , A graduate of University College Medical ... subsequently degreed in medicine in 2001. With further certification ...
Breaking Biology Technology:The Americas Inorganic Refrigerants Market is estimated to grow to $71.6 million by 2018 - New Report by MicroMarket Monitor 2The Americas Inorganic Refrigerants Market is estimated to grow to $71.6 million by 2018 - New Report by MicroMarket Monitor 3Shimadzu Releases QuantAnalytics Open Access LCMS Software Package for Clinical Applications 2myPROpad™ Topic of Panel Discussion at the Yale Food Systems Symposium 2myPROpad™ Topic of Panel Discussion at the Yale Food Systems Symposium 3Dr. Yousef Siddiqui joins the Grace Century Advisory Team 2
... href="http://www.ambion.com/catalog/CatNum.php?1632"> Silencer , ... be readily adapted for labeling long dsRNA. ... for this application. See "<A , href="#visualizing">Visualizing ... experimintal data using dsRNA , labeled in ...
... , NAVIGATE THIS ARTICLE: <A , ... href="#3">RNA , Isolation, Probe Generation > <A , ... > <A , href="#5">Hybridization, , ... & Reprobing , , , , ...
... Ambion has ... siRNA synthesis and purification based on in vitro , ... (patent pending). This kit produces transfection-ready siRNA , ... researchers at the Salk Institute ...
Cached Biology Technology:Fluorescently Labeling Long dsRNA with the Silencer siRNA Labeling Kit 2Fluorescently Labeling Long dsRNA with the Silencer siRNA Labeling Kit 3Fluorescently Labeling Long dsRNA with the Silencer siRNA Labeling Kit 4Northern Analysis: The Basics 2Northern Analysis: The Basics 3Northern Analysis: The Basics 4Northern Analysis: The Basics 5Northern Analysis: The Basics 6Northern Analysis: The Basics 7Northern Analysis: The Basics 8Northern Analysis: The Basics 9Northern Analysis: The Basics 10Northern Analysis: The Basics 11Northern Analysis: The Basics 12Northern Analysis: The Basics 13Northern Analysis: The Basics 14Northern Analysis: The Basics 15Northern Analysis: The Basics 16Northern Analysis: The Basics 17Northern Analysis: The Basics 18Northern Analysis: The Basics 19Your Data: Silencing Neural Cell Adhesion Genes with In Vitro Transcribed siRNAs 2
... RPMI 1640 with 2 mM L-glutamine and harvested ... order to keep the antigens in their native ... cells are arrayed on a 12-well (5 mm) ... treated to enhance cellular attachment and to minimize ...
Mouse polyclonal antibody to REXO4 - XPMC2 prevents mitotic catastrophe 2 homolog (Xenopus laevis)...
CELLine System cultivation flask (for secreted products)...
... StabilCoat Plus Microsphere/Microarray Stabilizer is an ... protein and other non-toxic chemicals in a ... 7.4. This product contains a ... as a preservative. StabilCoat Plus Stabilizer ...
Biology Products: