AWWA standard Articles

  • Establishing the First Validated Dataset of North American Water Utility Water Audit Data

    The American Water Works Association‟s (AWWA) Water Loss Control Committee (WLCC)assembled in 2011 an initial dataset of Water Audit data from 26 water systems from the United States and Canada. This effort represents the initial phase of a project that ultimately aims to establish North American water industry benchmarks for water loss control, while promoting the use of standardized water ...


    By IWA Publishing

  • Oil and grease in waste water

    Determination of oil and grease in waste water according to Standard Methods AWWA 5520 This Application Note describes the extraction and determination of oil and grease from waste water samples following Standard Methods 5520 part D (Soxhlet Extraction Method). “Oil and grease” is defined as any material recovered as a substance soluble in the solvent. Therefore, compounds ...


    By BÜCHI Labortechnik AG

  • How Seismic Use Group Classification affects your Water Storage Tank

    When purchasing a bolted steel tank or a welded steel water storage tank, one of the key criteria determining the design parameters of the tank is the Seismic Use Group (SUG) classification. The term Seismic Use Group is essentially the same as the terms Occupancy Category and Risk Category used by the International Building Code (IBC) and the ...


    By Superior Tank Co., Inc.

  • Effects of the Location of Broken Prestressing wires wraps in structural integrity of a damaged PCCP

    Abstract Breakage of prestressing wire wraps is an indication of damage in Prestressed Concrete Cylinder Pipe (PCCP) due to corrosion, hydrogen embrittlement, overloading, and manufacturing defects. The strength of the damaged pipe is not only related to the number of broken prestressing wire wraps but also to the location of the break regions along the length of the pipe. In this paper, a ...

  • Analysis of Anionic Contamination & General Quality Testing in Water from Sewage Treatment Plants and Industrial Discharge & Effluents by Colorimetry

    Problem The high concentration of Industry, Agriculture and People in and around the United States has changed the “nature” of our environment. There are Toxic Metals coming from various metallurgical processes; Plating, Foundry, Smelting, Milling, etc., which are readily determined by Atomic Absorption Spectroscopy (AAS). Volatile Organics from the many Petrochemical-based operations are ...


    By Buck Scientific Inc

  • Tank Rehabilitation and Maintenance Case Study: Ware Shoals, SC - 250,000 Gallon Torus Bottom Elevated Tank

    After years of bidding one-time repaint contracts, the Town of Ware Shoals, SC found that their tank was receiving only limited "maintenance". The exterior of the tank had been overcoated multiple times, but lead primer below was still present. As the paint thickness built up, the Town discovered that they could no longer continue to add more coats of paint. As a result, the tank exterior would ...


    By Caldwell Tanks, Inc.

  • Installation of Large Diameter Buried Pipes

    The ProblemThere is an ongoing need to provide designers, specifiers, engineers, consultants and students an overview and general understanding on the proper installation and rehabilitation of buried municipal and industrial pipelines to provide a long-lasting wastewater and potable water infrastructure that will serve future generations. Goals and ObjectiveMost buried ...

  • Chignik Lake, Alaska: Remote Community Water Treatment Plant Pilot Testing

    Chignik Lake, Alaska is a small community located on the south side of the Alaska Peninsula. The community’s only potable water source is one groundwater well, which is located within close proximity to potential contamination sources. Due to this threat of contamination and per the recommendations contained in the sanitation facilities master plan completed on behalf of the community in 2000, ...

  • Underground Water Tanks: Understanding the installation process is the first step in safety inspections

    Underground storage tanks are increasingly becoming essential components of building projects, driven by rising interest in on-site rainwater and graywater collection and reuse. As a result, building officials may need to expand their expertise to include these products and their components. Some safety inspection work is obvious; for instance, checking that the installer or project owner ...


    By Xerxes Corporation

  • Looking Back at the Water Industry in 2017 — And Looking Ahead

    Another year came and went, and we are now well into a new one, facing the approach of spring and construction season. 2017 brought about both accomplishments and new challenges not just for us here at AdEdge Water Technologies, but also for the water industry as a whole. Looking ahead at what’s to come in 2018, changing regulations and standards may pose challenges for water utilities and ...

  • Diamondhead, MS - 500,000 Gallon Torus Bottom Elevated Tank

    The Village of Diamondhead, MS was very fortunate to have received a high quality paint job when their tank was first constructed in 1976. In 2009 when Caldwell was selected to perform the work on this project, the original paint system was still in place on the exterior of the tank, with only overcoats having been applied on top of it. However, the years had taken their toll and the lead primer ...


    By Caldwell Tanks, Inc.

  • Our drinking water systems are a disaster. What can we do?

    In the wake of the Flint, communities turn to innovative technology and financing to prevent the next crisis. People in developed countries turn on the tap and safe drinking water flows, a dramatic health benefit they tend to take for granted. That complacency was dramatically disrupted last year when children in Flint, Michigan, started testing positive for lead poisoning and the ...


    By Ensia

  • Homeland Security for Drinking Water Supplies

    As it has done with other jurisdictions, Congress has recently passed legislation aimed at protecting our nation's drinking water resources. Historically, water supply protection has been a high priority, including reservoir protection, continuous monitoring, and secure and redundant facilities to ensure an uninterrupted supply of drinking water. The Clean Water Act (1972), requires pollution ...


    By AECOM

  • What’s in those new plastic pipes delivering drinking water?

    Lingering questions leave some concerned about a new generation of plumbing material The calls and e-mails arrive as often as several times a week from people with concerns about drinking water. Some of the callers — who include homeowners, architects and builders — want to know why their water smells like gasoline. Others want to know which kinds of pipes to ...


    By Ensia

  • Factors Affecting Cyanide Generation in Chlorinated Wastewater Effluent Matrix

    ABSTRACTFalse positives for cyanide analysis in wastewaters have been reported. We examined the effects of storage time at high pH and of pH adjustments on the cyanide levels. Cyanide levels changed within the holding time allowed by Standard Methods. We also studied the difference in cyanide levels using two disinfection conditions -- breakpoint chlorination and chloramination. Glycine was used ...

  • Top 10 questions you should ask when purchasing a control valve

    Automatic control valves, much like everything else we purchase these days, are not all created equal. Some fall into the high quality bracket with pricing to match, while others hover closer to the lower quality and price sensitive end of the scale. Unfortunately, when evaluating control valve prices, it is not always clear what you are being offered ...


    By Singer Valve Inc.

  • A critical moment to harness green infrastructure—not concrete—to secure clean water

    Natural ecosystems provide essential services for our communities. Forests and wetlands, for example, filter the water we drink, protect neighborhoods from floods and droughts, and shade aquatic habitat for fish populations. While ...

  • Chloramines

    OVERVIEW When chlorine is added to a water supply containing certain organics, the formation of halogenated organics occurs. Called 'trihalogenated methanes' (THM's) these reaction products are suspected carcinogens and maximum allowable limits in municipal supplies are imposed by the U.S. Environmental Protection Agency (EPA). To reduce the potential for the formation of THM's, many U.S. ...

  • Introduction to Iran Spiral Company

    Iran SPIRAL COMPANY (ISCO) was established in 1991 East of Isfahan in the Segzi Industrial Zone at km 52 of the Esfahan – Naein Road. The aim was manufacture and supply of spiral welded line pipes for oil, gas and water usage. FEATURES OF ISCO ·         Having two simultaneous production mills gives more flexibility and faster ...


    By Iran Spiral

  • What makes high-risk pipelines deteriorate to a state of failure?

    According to AWWA's 2016 Benchmarking Survey, the average water and wastewater utility has seven breaks per 100 miles of piping every year. Tip-top systems experience just four breaks in that distance, while those at the bottom have 18. While it’s interesting to note the difference in break rates, it’s unfair ...

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