Showing results for: water quality regulation Articles
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Maximizing the accuracy of field‐derived numeric nutrient criteria in water quality regulations
High levels of the nutrients nitrogen and phosphorus can cause unhealthy biological or ecological conditions in surface waters, and prevent the attainment of their designated uses. Regulatory agencies are developing numeric criteria for these nutrients in an effort to ensure that the surface waters in their jurisdictions remain healthy and productive, and that water quality standards are met. ...
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Evaluation of multiple-locus variable-number tandem repeat analysis (MLVA) for genotyping of Escherichia coli isolated from Karaj River
Most microbiological water quality regulations rely upon the detection of indicators of fecal pollution, such as coliform bacteria, or more specifically Escherichia coli. In order to further understand the source, fate, and implications for water quality regulation, environmental E. coli isolates should be assessed genetically to observe various levels of genotypic diversity. Multiple-locus ...
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Water trading quality programs: An international overview
Water quality trading is gaining traction in a number of watersheds around the world. It is a market-based approach that works alongside water quality regulation to improve water quality, providing flexibility in how regulations are met and potentially lowering regulatory compliance and abatement costs. Our research identified 57 water quality trading programs worldwide. Of these, 26 are active, ...
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Modeling and evaluation of compliance to water quality regulations in bathing areas on the Daoulas catchment and estuary (France)
The microbiological quality of waters in estuaries determines their acceptability for recreational uses. Microbiological contamination often results from urban wastewater discharges or non-point source pollution (manure spreading), and can cause bathing zones to be closed. European regulations (EC/7/2006) have proposed standards (500 E. coli/100 ml) for the acceptability areas for bathing. In ...
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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 ...
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Influence of the land use pattern on the concentrations and fluxes of priority pollutants in urban stormwater
This paper presents the results of the concentrations (μg/L) and fluxes (g/ha) of priority substances in stormwater from three watersheds with different land use patterns (namely, residential, urban dense, high urban density). Samples were collected at the outlet of these watersheds. Thirteen chemical groups were investigated corresponding to 88 individual substances before treatment. Results ...
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Water compliance challenges: how do Canadian small water systems respond?
Fundamental to community health and well-being is the capacity to access a sustainable supply of safe drinking water. Small community drinking water systems are the most vulnerable to contamination, and struggle to secure the funds necessary to improve water treatment and delivery systems, and meet increasingly stringent drinking water quality regulations. Little is known of the contextual and ...
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Freshwater Resources: Managing the Risks Facing the Private Sector
In recent years, a broad set of national and international water issues has begun to receive significant attention at all levels of society, from leaders at the United Nations to local communities in the United States and around the world. In part, this is due to a growing understanding of the complex interconnections between water and almost every other major issue of the day, including ...
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Pyrethroid and organophosphate pesticide‐associated toxicity in two coastal watersheds (California, USA)
Portions of the Santa Maria River and Oso Flaco Creek watersheds in central California, USA, are listed as impaired, under section 303(d) of the Clean Water Act, and require development of total maximum daily load (TMDL) allocations. These listings are for general pesticide contamination, but are largely based on historic monitoring of sediment and fish tissue samples that showed contamination by ...
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The common ecotoxicology laboratory strain of Hyalella azteca is genetically distinct from most wild strains sampled in eastern North America
The amphipod Hyalella azteca is commonly used as a model for determining safe concentrations of contaminants in freshwaters. We sequenced the mitochondrial cytochrome c oxidase subunit I (COI) gene for representatives of 38 populations of this species complex from US and Canadian toxicology research laboratories and eastern North American field sites to determine their genetic relationships. ...
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Innovative, effective, and environmentally sound solution: MBR wastewater treatment systems
Over the past 10 years, MBR technology has advanced to become a serious contender to conventional wastewater treatment technologies, and is now considered a proven technology. MBR systems with submerged membrane modules offer two main advantages: A significantly improved effluent quality and a substantially smaller footprint.Membrane Biological Reactor (MBR) technology is a simple, yet effective ...
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Corporate Reporting on Water - A Review of Eleven Global Industries
Water is a crucial resource for nearly all industry activities. Yet decreasing water availability, declining water quality, and growing water demands from nonindustrial water users are creating new challenges to businesses that have traditionally taken clean and reliable water for granted. Around the world, corporations are now facing diverse water risks, including changing allotments, more ...
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Water scarcity & climate change: Growing risks for businesses & investors
Water is crucial for the economy. Virtually every industry from agriculture, electric power and industrial manufacturing to beverage, apparel, and tourism relies on it to grow and ultimately sustain their business. Yet water is becoming scarcer globally and every indication is that it will become even more so in the future. Decreasing availability, declining quality, and growing demand for water ...
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St. Bernard Parish uses Singer Valve’s taps to meet compliance with water safety standards - Case Study
Their Challenge To improve the water quality of St. Bernard Parish and to meet compliance with water quality standards. Our Solution Singer Valve’s Total Automatic Purging System The Result On track with water quality standards and regulation Improved chlorine residuals, lower total Trihelomethane and Haloactic acid values Reduced consumer complaints ...
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Employing flexible data management solutions that deliver improved productivity and quality in the water and environmental industry
This article will discuss the industry trends and challenges environmental monitoring organizations face today and will demonstrate how the use of a Laboratory Information Management System (LIMS) allows managers to make informed decisions to improve throughput, resolve environmental issues and risks faster, all while enabling organizations to comply with strict regulatory guidelines. An ...
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Heavy metal levels in tap water in Batina Region, Oman
Most household in Batina depend on private wells for their fresh water supplies. The quality of such water is not regulated or tested by authorities and, therefore, consumers' health might be at risk if water is contaminated. We assessed the contribution of some heavy metals to water pollution. Water samples from 364 houses were collected and analysed for levels of lead, chromium, nickel and ...
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Loch Ascog Water Treatment Works (WTW) - Case Study
Background Loch Ascog WTW, on the Isle of Bute in Western Scotland, treats water abstracted water from the loch. The main treatment at the works was slow sand filtration followed by disinfection. The quality of the treated water was not compliant with the National Requirements of The Water Supply (Water Quality) Regulations 2000 in relation to: Iron and manganese Turbidity and taste ...
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Seasonal water quality vs. flow relationships in a small regulated stream
The relationship of a water quality constituent with respect to flow measured at a stream monitoring station can give valuable information about the watershed and in-stream processes about the constituent in question. Seasonal dependency patterns often reveal relationships which would be unnoticed if all data are treated together. The aim of this study is to examine water quality constituent ...
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Optical Assessment of Dissolved Organic Carbon
Natural organic matter is present in all sources of drinking water. When chlorine is used for drinking-water treatment, a portion of the natural organic matter reacts to form halogenated compounds, referred to as disinfection by-products (DBPs), some of which are regulated by the USEPA due to their health effects. The implementation of stricter drinking-water quality regulations for DBPs has ...
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Membrane Aerated Biofilm Reactor (MABR) White Paper
Fluence’s revolutionary Aspiral™ and SUBRE wastewater solutions provide high-quality treatment while slashing energy costs Membrane aerated biofilm reactor (MABR) wastewater treatment technology provides a long list of benefits: low-odor, low-noise operation, unprecedented fast-track installation and commissioning, easy operation and maintenance, and agile scalability. It’s ...
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