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Showing 1 to 20 of 33 for “"maximum contaminant level"”.
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Identifying the Feasible Maximum Contaminant Level for Per- and Polyfluoroalkyl Substances That Ensures Health and Safety While Maintaining Affordability and Equity of Drinking Water and Implementation of That Maximum Contaminant Level Within California by the State Water Resources Control Board
… the U.S. population has been shown to have some level of PFAS within their blood, long term exposure to PFAS is potentially harmful to health. Individuals who are exposed regularly have been shown to have decreased fertility and birth weight, weakened immune systems, increased risk of cancer, …
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Spatial Analysis of Atrazine in the Elm Fork Watershed
… four-quarter drinking water average of 3 µg/Lthe Maximum Contaminant Level set by the USEPA. However, three creek stations had four-quarter average concentrations greater than 3 µg/L, and virtually all samples exceeded the 0.1 µg/L standard set in Europe [1,2]. Statistically significant …
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Use of GIS to Identify and Delineate Areas of Fluoride, Sulfate, Chloride, and Nitrate Levels in the Woodbine Aquifer, North Central Texas, in the 1950s, 1960s, 1970s, 1980s, and 1990s
… obtained to determine the relationship with each contaminant. Spearman's rank correlation coefficients and Kruskal-Wallis tests were used to calculate relationships between variables. Land uses had little effect on distributions of contaminants. Sulfate and fluoride levels were most problematic in …
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Evaluation of Bromate Formation and Control using Preformed Monochloramine in Ozonation for Indirect Potable Reuse
… below the U.S. Environmental Protection Agency Maximum Contaminant Level of 10 µg/L while exceeding 3-log or 99.9% virus removal credit. Preforming monochloramine in separate carrier water prior to addition upstream of ozonation eliminated the potential for disinfection byproduct formation when …
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Heavy Metal Concentrations in Springs and Sinkholes in and Around Springfield, Greene County, Missouri
… the concentrations of barium are below the Maximum Contaminant Level Goal (MCLG) set by the United States Environmental Protection agency for drinking water. Concentrations of lead and copper in all springs were below instrumentally determined detection limits.
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Pseudostationary Phase for Solid Phase Extraction
… for all PAHs examined were lower than EPA's maximum contaminant level.
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Study of the Distribution and Variation of the Herbicide Atrazine in Finished Drinking Water at a Small Community Water System in Kentucky
… drinking water in concentrations exceeding the Maximum Contaminant Level (MCL) of 3 ppb as established by the US Environmental Protection Agency (US E.P.A).The Safe Drinking Water Act (SDWA) methodology requires quarterly sampling strategy to be implemented by all small community water systems …
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Arsenic contamination study of drinking water in Nepal
… found above the World Health Organization (WHO) maximum contaminant level of 10ppb in the Kathmandu Valley. However, 18% of samples taken from the Terai region of Nepal were above the WHO limit. Detectable levels of arsenic were found in tube wells ranging from approximately 30 to 300 feet deep. …
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Cr(VI) Generation and Stability in Drinking Water
… US Environmental Protection Agency (USEPA) maximum contaminant level (MCL) for total chromium of 100 ppb is under revision to consider a specific level for Cr(VI), which has a proposed MCL of 10 ppb in California. Cr(VI) is a suspected carcinogen, and interconverts with the other most …
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Manganese removal from an organic-laden surface water
… As a result, soluble manganese increases to levels of nearly 6.0 mg/L at the bottom. It is released from the sediments under anaerobic conditions. Total organic carbon levels ranging from 4.0 to 7.25 mg/L were noted with increasing depth. Plant profiles were developed to indicate the …
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Isotope Investigation of Nitrate in Soils and Agricultural Drain Waters of the Lower Yakima Valley, Washington
… has long been known to frequently exceed the EPA maximum contaminant level standard for potable water (10 mg/L), adversely impacting communities with disadvantaged socio-economic status. In this research, nitrogen and oxygen isotopic signatures were determined for nitrate soil leachates and …
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The Occurrence and Control of Disinfection By-Products (DBPs) in Two Water Treatment Plants Utilizing the Same Source
… Environmental Protection Agency (USEPA) to set a maximum contaminant level (MCL) for total THMs and HAAs. The disinfectant/disinfection by-product rule (D-DBP Rule) currently proposed by the USEPA will lower the MCL for THMs and HAAs. Past and pending DBP regulations have provided a momentum to …
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Trihalomethane compounds in the drinking water of Kuwait: A survey from source to consumer
… (continuous vs. shock), sea water temperature, level of organic precursors and contact time. Of much more important consequence, as far as the presence of these compounds in drinking water is concerned, was the degree of THM compounds formation as a result of the chlorination of drinking water …
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Functionalization and fabrication of single-walled carbon nanotube-based chemiresistors for sensory applications
… State Environmental Protection Agency (EPA) maximum contaminant level (MCL) of fluoride and cyanide selectively.
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Design Methodology for Permeable Reactive Barriers Combined With Monitored Natural Attenuation
… the thickness of a PRB capable of degrading a contaminant from a source contaminant concentration to a maximum contaminant level at a Point of compliance . Both equations integrate the fundamental components that drive the natural attenuation process of the aquifer and the reactive capacity of …
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Springing for Safe Water: Drinking Water Source Selection in Central Appalachian Communities
There are rural residents of Central Appalachia that collect their drinking water from roadside springs despite having access to in-home piped point-of-use (POU) water. Residents have cited perceptions about water availability/quality as primary motivators for collecting drinking water from …
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Exposure Assessment of Mercury in Fish from Kentucky Surface Waters
… that consume fish. EPA has been determined the maximum contaminant level of mercury in fish to be 1 ppm, and stated that the general consumer should be advised to eat no more than 1 meal/week of noncommercial fish in the U.S. at this level. Also, they determined the reference dose of …
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The Removal and Recovery of Oxo-Anions from Aqueous Systems using Nano-Porous Silica Polyamine Composites
… drinking water and the food chain. Increased levels of well known poisonous metals such as arsenic, selenium, lead and mercury are frequently detected in aqueous wastes. Arsenic and selenium are highly toxic elements to human health and the environment. The Maximum Contaminant Level (MCL) for …
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The Removal and Recovery of Oxo-Anions from Aqueous Systems using Nano-Porous Silica Polyamine Composites
… drinking water and the food chain. Increased levels of well known poisonous metals such as arsenic, selenium, lead and mercury are frequently detected in aqueous wastes. Arsenic and selenium are highly toxic elements to human health and the environment. The Maximum Contaminant Level (MCL) for …
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Chloramine and MIEX control of disinfection by-products formed from an alluvial aquifer water source
… risk from DBPs, the EPA established a current maximum contaminant level (MCL) is 80 [mu]g/L of THMs and 60 [mu]g/L of HAA[superscript 5] based on the locational running annual average (LRAA) include in Stage 2 of the disinfectants and disinfection by-products rule. However, the formation of …
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