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Best Practices for Finished Potable Water Storage Facilities

  • • There should be a continuous flow of the water from the distribution system into the top of the storage tanks and out of the bottom of the tanks to help prevent stagnant water from accumulating.
  • • Note all potential aesthetic indicators as concerns for water storage facilities including: poor taste and odor; accumulation of sediment; and water temperature which may indicate temperature stratification within a reservoir. These indicators may also be caused by the age of the water being stored, inadequate treatment process, the pipe materials, and the condition or age of the distribution system.
  • • Test the water from the storage tanks or facilities frequently to determine lower disinfectant residuals, higher bacterial counts, and elevated nitrate/nitrate levels indicating nitrification as a means of determining if there are problems in the potable water storage facility.
  • • Inspect the tanks in both the interior and exterior for physical integrity, security, visible pollutants, vandalism, cleanliness, coating failures, maintenance, and repair problems.
  • • Follow the appropriate American Water Works Association standards for disinfection of storage facilities and coating systems, and/or the NSF International/American National Standards Institute standard, NSF/ANSI 61.
  • • Use booster disinfection when needed to restore disinfectant residuals at a water storage facility. Be aware of additional disinfectant byproducts.
  • • Establish a comprehensive routine maintenance, repair, and replacement program for water storage facilities.
 
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