groundwater nitrogen News

  • Webinar - Environmental Isotopes in Groundwater Studies: Nitrogen Species and Reactions in Contaminated Groundwater

    Webinar overview Gain insight on the integration of nitrogen geochemistry and isotopes may be used for tracing the origin of nitrogen species and their transformations in the subsurface in this Webinar, which is a part of the Environmental Isotopes in Groundwater Studies Webinar series*. Nitrogen represents one of the most ubiquitous and challenging contaminants in ...

  • Apache Nitrogen Products, Inc agrees to US$5 million groundwater and soil cleanup

    The U.S. Department of Justice, the U.S. Environmental Protection Agency and Apache Nitrogen Products, Inc. entered into a consent decree for future groundwater and soil cleanup at the Apache Powder Superfund Site, near St. David, Ariz. Apache Nitrogen Products will continue to remove nitrate and perchlorate from groundwater and perform long-term groundwater monitoring. The work will cost up to ...

  • Seeps important in watershed nitrogen retention

    Globally, the mobilization of nitrogen has increased significantly due to human activities, such as industrial and agricultural development. As a result, over the past decades, eutrophication in coastal ecosystems has increased. Watershed nitrogen retention is an important mechanism to decrease nitrogen loading to downstream water bodies. Generally, in the northeastern U.S., the amount of ...

  • Pesticides persist in groundwater, say SSSA

    Numerous studies over the past four decades have established that pesticides, which are typically applied at the land surface, can move downward through the unsaturated zone to reach the water table at detectable concentrations. The downward movement of pesticide degradation products, formed in situ, can also contribute to the contamination of ground water. Once in ground water, pesticides and ...

  • Microorganisms in toxic groundwater fine-tuned to survive

    Microorganisms can indeed live in extreme environments, but the ones that do are highly adapted to survive and little else, according to a collaboration that includes Department of Energy's Oak Ridge National Laboratory and Joint Genome Institute (JGI) and the University of Oklahoma. The metagenomic study of a 'stressed' microbial community in groundwater near a former waste disposal pond site on ...


    By ScienceDaily

  • Deep Groundwater & Dissolved Gas Sampling with Double Valve Pumps

    Sampling groundwater from deep wells is a challenge on its own, but add to that the need for accurate dissolved gas analysis, and the task gets that much harder. Low Flow, Deep Groundwater Sampling HydroTerra, a leading Australian company, and exclusive distributor of Solinst products, provides environmental monitoring solutions. ...


    By Solinst Canada Ltd.

  • Nitrogen pollution measures need tailoring to specific areas to ensure cost-effective results

    New research has shown that policy measures in Denmark have successfully reduced total nitrogen loading to 10 estuaries by 39% in recent decades. However, to fully meet the targets of the EU Nitrates Directive and comply with the EU Water Framework Directive in a cost-effective manner, further mitigation measures must be tailored and focused to particular areas. Increased use of nitrogen ...

  • Air pollution modelling could help predict algal blooms

    Models that predict how nitrogen from the air is deposited in the sea could be useful in predicting algal blooms. Based on the knowledge that excess nitrogen increases algal growth rates, researchers simulated nitrogen deposition in the North Sea and suggested that, using predicted weather data, it might be possible to adapt this approach to predict algal blooms. Algae populations are kept under ...

  • BRIDGE provides thresholds for EU Water Framework Directive

    The EU Water Framework Directive (WFD) defines chemical status objectives for groundwater and related monitoring obligations but does not yet provide criteria to assess chemical status compliance. Now researchers from EU project BRIDGE (Background Criteria for the Identification of Groundwater Thresholds) have investigated 14 representative bodies of groundwater and developed thresholds that can ...

  • Biodiversity protection in the Netherlands

    Two thirds of natural areas in the Netherlands suffer from at least one of four key environmental pressures including nitrogen pollution, drying, acidification and habitat fragmentation, a new study suggests. Possible solutions to enable the country to meet its commitments under the EU’s biodiversity targets include moves towards sustainable farming and reduction of nitrogen outputs, the ...

  • HPR-40 MIMS System Assists in Denitrification Studies

    Denitrification is the process carried out by bacteria that converts nitrites and nitrates to nitrogen, nitric oxide and nitrous oxide gases. Two of these gases have been linked with ozone layer depletion and global warming. Denitrification is an anaerobic process and occurs in environments where oxygen levels are depleted, such as within soils and groundwater. The Hiden HPR-40 membrane inlet ...


    By Hiden Analytical

  • CH2M HILL employee receives prestigious EPA award

    Robert (B.T.) Thomas was one of five team members awarded a 2007 Level I Scientific and Technological Achievement Award (STAA) by the U.S. Environmental Protection Agency (EPA) for their collaborative research and co-authorship of a research paper entitled, “Groundwater N Speciation and Redox Control of Organic N Mineralization by O2 Reduction to H2O2.” Prior to joining CH2M HILL, Dr. Thomas was ...


    By CH2M Hill Companies, Ltd.

  • Drinking water in Gaza Strip contaminated with high levels of nitrate

    Palestinian and German scientists have recommended to the authorities in the Gaza Strip that they take immediate measures to combat excessive nitrate levels in the drinking water. 90 per cent of their water samples were found to contain nitrate concentrations that were between two and eight times higher than the limit recommended by the World Health Organization (WHO), say the researchers from ...

  • Third of Irish rivers and streams polluted, new study reveals

    The latest report on water quality in Ireland to be released by the EPA, Water Quality in Ireland 2004 – 2006, assesses the quality of  lakes, rivers, canals, coastal areas and groundwater and presents a detailed picture of the quality of Irish waters.  This comprehensive review deals with the conditions in some 13,240 km of river and stream channel (1,151 rivers), 449 lakes, 69 ...

  • Nutrient levels on the decline in many Estonian rivers

    A new study has analysed the impact of industrial and agricultural changes on nutrients in Estonian rivers. The results indicated that there were significant reductions in nitrogen in one third of the sites, significant reductions in phosphorus in a quarter of sites and significant reductions in both nutrients in nearly a tenth of sites. High levels of nutrients, such as nitrogen and phosphorus, ...

  • Waters acidified by air pollution have recovered as predicted

    Back in 1999, a group of scientists predicted how changing air pollution levels would affect the acidity of lakes and rivers in Europe in 2010 using a computer model. A follow up study has now gathered actual measurements of these waters to see if the predictions came true. The observations show that most of the rivers and lakes did recover from acidification, as forecast by the model, and ...


    By European Commission

  • Swathe of new EU green laws published

    A series of new EU environmental rules were published in the official journal in late December, triggering their entry into force. Directive 2006/118/EC on the protection of groundwater from pollution requires that by 22 December 2008, member states establish threshold safety values for substances including mercury, ammonium, and lead.  It also imposes a single limit value of 50 milligrams per ...

  • VORTEX Sewage Treatment Plant Averages 0.4mg/L NH4-N

     The VORTEX™ sewage treatment plant is an Activated Sludge Process system with fail-safe and sludge management features not found in any UK manufactured systems.  The average attained during its ...

  • Water well owners should check water periodically for bacteria, nitrate

    Bacteria and nitrate are widespread in the environment, so every household water well owner should regularly test their water to make sure no health risk exists, the National Ground Water Association recommended today. While most bacteria found in water do not cause disease, disease-causing bacteria called pathogens can exist in well water given the right circumstances, NGWA said. Nitrate is not ...

  • Gas analyser helps reveal NITRABAR success

    A portable FTIR multiparameter gas analyser from Quantitech is helping researchers at the University of Strathclyde to prove the efficacy of a novel technique ('NITRABAR' - an EC LIFE Environment Project) that helps remove nitrate pollution from groundwater. The NITRABAR system uses permeable reactive barrier technology and consists of a trench containing a mixture of natural materials, which ...


    By Quantitech Ltd

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