Utilities must decide whether to modify their existing treatment practices to achieve compliance with the D/DBP regulations. A regulatory impact analysis predicted that up to 70% of large surface-water systems would need to make some treatment modifications. Meeting multiple water-quality objectives plays an important role in the decision-making process of water utilities. Utilities must meet other regulatory requirements and secondary drinking-water standards. In addition, there are operational, financial, and engineering issues that affect the selection of treatment technologies. Because of...
Utilities must decide whether to modify their existing treatment practices to achieve compliance with the D/DBP regulations. A regulatory impact analy...
Technology offers one of the significant levers that utility managers have available to truly "do more with less." But it often is difficult for managers to know how much to spend on technology, where the expenditures should be, and what the expected return on that investment should be. The objective of this study was to determine successful approaches for implementing utility IT systems considering the range of factors influencing today's utility IT environment. The study cites leading practices that create effective IT solutions (not technology-specific solutions). While specific technology...
Technology offers one of the significant levers that utility managers have available to truly "do more with less." But it often is difficult for manag...
Although ingestion of high levels of arsenic is believed to cause certain cancers, estimates of cancer risk resulting from exposure to low levels of arsenic are the subject of considerable debate. An improved understanding of arsenic toxicity and the dose-response relationship for relatively low levels of arsenic could improve the risk assessment process. The overall objective of this study was to contribute to a better understanding of arsenic health effects. A specific aim was to investigate the cellular response of exposure to arsenic. This includes the analysis of cells treated with...
Although ingestion of high levels of arsenic is believed to cause certain cancers, estimates of cancer risk resulting from exposure to low levels of a...
The operation of ozone contactors needs to be optimized to provide adequate disinfection while minimizing the formation of disinfection by-products. However, measuring the actual disinfection efficiency is impractical in a full-scale system. The objective of this project was to demonstrate of the use of polystyrene microspheres to assess and optimize the performance of full-scale ozone disinfection systems. Specifically, the researchers developed and optimized microspheres with laboratory-scale experiments, demonstrated the use of microsphere method with a full-scale ozone contactor, and...
The operation of ozone contactors needs to be optimized to provide adequate disinfection while minimizing the formation of disinfection by-products. H...
When water leaves a treatment works and travels through a distribution system, its quality, with respect to many chemical and biological parameters, will degrade. The quality of the delivered water will be largely influenced by: The quality of treated water supplied into the network The condition of distribution assets within the network The retention time within the network. The water industry has focused predominantly on the quality of treated water and the physical condition of distribution assets when improving the quality of water at the customer's tap. However the quality of the water...
When water leaves a treatment works and travels through a distribution system, its quality, with respect to many chemical and biological parameters, w...
Phosphorus in surface runoff from agricultural lands is often implicated in the degradation of surface water quality. Many states are developing soil phosphorus application limits. Utilities must develop and implement new best management practices (BMPs) to control phosphorous. The objective of this project was to investigate the beneficial use of water treatment residuals (WTRs) to control non-point source (NPS) phosphorus pollution and protect surface water quality. Specifically, the researchers planned to examine the unique chemical characteristics of WTRs, namely the large concentration...
Phosphorus in surface runoff from agricultural lands is often implicated in the degradation of surface water quality. Many states are developing soil ...
Health risks from infrastructure failures are not well understood, despite the potential widespread introduction of chemical, microbial, and physical contaminants, as well as service disruptions. Public health effects due to distribution infrastructure failures are the concern and responsibility of the local water utility, the health department, community medical care providers, and in special circumstances, emergency first response agencies. While the water utility is responsible for safe water, including the operation and maintenance of distribution infrastructure, other agencies including...
Health risks from infrastructure failures are not well understood, despite the potential widespread introduction of chemical, microbial, and physical ...
