Water Quality Regulations Articles

  • Case study - City of Montreal upgrade of Atwater and Des Baillets water treatment plants

    Sidestream Venturi Injection—Basin Nozzle Manifold Contacting System. Montreal, Quebec, Canada The Problem: In 2001, a water quality audit revealed that two of the largest drinking water plants in the City of Montreal were out of compliance with Quebec’s latest water quality rules. In response to the audit, the city upgraded the 1,400 MLD Atwater and the ...

  • Combined risk assessment of nonstationary monthly water quality based on Markov chain and time-varying copula

    Water quality risk management is a global hot research linkage with the sustainable water resource development. Ammonium nitrogen (NH3-N) and permanganate index (CODMn) as the focus indicators in Huai River Basin, are selected to reveal their joint transition laws based on Markov theory. The time-varying moments model with either time or land cover index as explanatory variables is ...


    By IWA Publishing

  • Antibacterial Ingredients Ruled Unsafe. Hallelujah, the FDA has awoken!

    Today’s FDA ruling has got us booming! The debate between cleaning product makers, environmentalists and researchers has finally ended. The FDA ruled today that it is no longer considering antibacterial ingredients in soaps to be safe. This is a big deal for us as we have long discussed the harmful effects of killing “good” and “bad” bacteria as ...


    By Better Air LLC

  • Multiplex PCR for detection of water-borne bacteria

    Microbial water-borne diseases still affect developing countries and are major water quality concerns throughout the world. Routine culture-based methods of identifying bacterial pathogens in water sources are laborious and time-consuming. Recently, the use of molecular techniques such as the polymerase chain reaction (PCR) has provided rapid and highly promising detection methods. In this ...


    By IWA Publishing

  • Microbiological water quality of the Nišava River

    Microorganisms are the ideal indicators of the organic pollution of the surface waters because of their ability to promptly respond to environmental changes. Due to poor economic situation and lack of law implementation, most wastewaters in Serbia are released directly into a surface water recipient without any, or a limited, treatment. This practice has created numerous highly polluted ...


    By IWA Publishing

  • Private rights, public interests and water use conflicts: evolving water law and policy in Michigan

    Water conflicts are rare across Michigan's history. As a result, water rights have received little attention by courts or the legislature. Traditionally, the common law of water rights in Michigan embraces the riparian doctrine for surface water and provides landowners with the right to use groundwater. However, two recent changes in common and statutory law significantly modify the legal ...


    By IWA Publishing

  • EPA Requests Comments on Revocation of Chlorpyrifos Tolerances

    On October 30, 2015, the U.S. Environmental Protection Agency (EPA) announced that it is requesting comments on a proposal to revoke all tolerances for the insecticide chlorpyrifos. EPA issued this proposal in response to an August 10, 2015, writ of mandamus by the U.S. Court of ...


    By Bergeson & Campbell, P.C.

  • EPA Clean Water Act: New Regulations re: `Waters of the United States`

    The Environmental Protection Agency (EPA) published a final rule defining the scope of waters protected under the Clean Water Act… The rule will ensure protection for the nation’s public health and aquatic resources, and increase CWA program predictability and consistency by clarifying the scope of ‘‘waters of the United States’’ protected under the ...

  • Quantifying the robustness of optimal reservoir operation for the Xinanjiang-Fuchunjiang Reservoir Cascade

    In this research we investigate the robustness of the common implicit stochastic optimization (ISO) method for dam reoperation. As a case study, we focus on the Xinanjiang-Fuchunjiang reservoir cascade in eastern China, for which adapted operating rules were proposed as a means to reduce the impact of climate change and socio-economic developments. The optimizations were based on five ...


    By IWA Publishing

  • Dynamic simulation of water resources in an urban wetland based on coupled water quantity and water quality models

    Water quality in wetlands plays a huge role in maintaining the health of the wetland ecosystem. Water quality should be controlled by an appropriate water allocation policy for the protection of the wetlands. In this paper, models of rainfall/runoff, non-point source pollution load, water quantity/quality, and dynamic pollutant-carrying capacity were established to simulate the water ...


    By IWA Publishing

  • Evolution of regulatory targets for drinking water quality

    The last century has been marked by major advances in the understanding of microbial disease risks from water supplies and significant changes in expectations of drinking water safety. The focus of drinking water quality regulation has moved progressively from simple prevention of detectable waterborne outbreaks towards adoption of health-based targets that aim to reduce infection and disease to ...


    By IWA Publishing

  • Collaboration as process: a case study of Michigan's watershed permit

    Collaborative watershed management has been heavily promoted and widely implemented to address a variety of natural resource concerns, resulting in the adoption and adaptation of the approach to management by regulatory agencies. Although several characteristics or indicators of success for watershed partnerships have been identified in the literature, these often portray a direct cause and ...


    By IWA Publishing

  • Thermal stratification of Portuguese reservoirs: potential impact of extreme climate scenarios

    Changes in water temperature and stratification dynamics can have a significant effect on hydrodynamics and water quality in reservoirs. Therefore, to assess future climate impacts, projections of three regional climate models for Europe, under the IPCC A1B emission scenario (2081–2100), were used with the CE-QUAL-W2 water quality model to evaluate changes in the thermal regime of 24 ...


    By IWA Publishing

  • Contracting water services with public and private partners: a case study approach

    The provision of water services is frequently a responsibility of local governments. Although municipalities remain accountable to the population for the availability, affordability, and quality of these services (facing the political repercussions of the perceived outcomes), the current operators may have different organizational models. Regardless of the utilities' governance model ...


    By IWA Publishing

  • Water supply and mining: the policy paradox in Ghana

    Ghana has been highly successful in mining for over a century. However, one area of concern is the negative impact of mining activities on water resources: their quality and quantity. Mining companies are guided by rules and regulations, particularly those that have to do with the quality of water supply. Safe water supply is essential for improved health and quality of life for increased ...


    By IWA Publishing

  • Assessing long-term water quality impacts of reducing phosphorus fertilizer in a US suburban watershed

    Phosphorus run-off from urban lawn care is a significant water quality concern in many US suburban communities. Many state and municipal governments in the USA adopt urban fertilizer laws or ordinances that prohibit the use of phosphorus-containing lawn fertilizers. This study assesses the long-term water-quality impacts of two phosphorus-reduction scenarios in a suburban watershed in Central ...


    By IWA Publishing

  • Water quality – water main renewal planner (Q-WARP): development and application

    The impact of deteriorating pipes on water quality (WQ) in the distribution network has not been consistently taken into account in decision making related to pipe renewals. In this paper, a detailed modeling approach based on fuzzy cognitive maps is developed using fuzzy rule-based models and fuzzy measures theory to investigate potential of WQ (physical, chemical, and biological) failure in ...


    By IWA Publishing

  • Meeting regulations and improving quality case study

    A UK-based waste oil collector was using emulsifiers and heat to drop water out of waste lube oils and fuels. The processed oil with 0.5-1.0% water was being filtered in a centrifuge. The company installed Sequoia’s efficient water evaporation equipment which produces oil with less than 0.1% water. As a result, the centrifuge works more efficiently. Ultimately, the company makes a recycled ...


    By Sequoia Global, Inc.

  • Modification of jar testing protocol combined with mEnCo model predicted dose to predict dissolved organic matter removal for surface water

    In recent climatic events in Australia, the need for frequent jar testing to determine optimum coagulant and flocculant aid doses became apparent in order to determine optimum treatment efficiencies. The generally applied jar test procedure can be time consuming and this prompted investigations for capacity to test waters more rapidly, for a range of treatment conditions and raw water qualities. ...


    By IWA Publishing

  • European bathing water quality in 2013

    Every year, millions of Europeans take advantage of the continent's wonderful selection of beaches, rivers, and lakes for a relaxing holiday or a day out. It is vitally important that they know the quality of the water they are swimming in, and that they do not jeopardize their health. The European Environment Agency (EEA) and the European Commission hope that this year's bathing water report ...

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