Pipe length renovated/pipe length requiring renovation Pipe length rehabilitated/rehabilitation required Inline water quality monitoring equipment calibrationĬalibrated/total number of inline water quality sensorsĬalibration/total number of water quality equipmentĬalibrated/total number of pressure meters Number of calibrated/total number of water-level sensors Number of calibrated/total number of flowmeters Inspected/total number of district metering zones Number of cleaned/total number of storage tanks of inspections done/required number of pump inspections This study will be useful for decision makers to assess the operational, technical and water quality performance of urban networks and take actions for improvements. The residual chlorine levels were within the acceptable range of the Public Authority for Water (PAW), showing a very good performance by virtue of water quality. The lower performance for pipe velocity may be attributed to the fact that the network is currently being utilized by 70% of the population for which it was designed. The network showed very high technical performance considering nodal pressures. Overall operational performance showed high scores whereas some indicators showed unacceptable performance values. A total of 37 operational performance indicators for the network were selected to carry out assessment. The technical performance of this network was assessed using global performance index methods after modifying the performance levels as per local guidelines. If you suspect someone is using a fire hydrant illegally, please notify the police immediately at 70.A water distribution network in an urban area in Muscat region (the capital city of Oman) is assessed for operational performance using the widely accepted methodology proposed by the International Water Association (IWA). The Town appreciates your tolerance of this inconvenience.Īny use of a fire hydrant can cause discoloration or sediment in the water lines. If you encounter discolored water in your home, run the cold water faucet until the water is clear. These conditions are not harmful and should be of short duration.
#HYDRANT WATERGEMS CHLORINE FREE#
Chemical additives that remove either free chlorine or chloramines from water for use in fish tanks or ponds are available at pet/fish supply stores.įlushing may result in some discoloration and the presence of sediment in your water. Note: If you have an aquarium or pond, always test the water you add to your aquatic environment throughout the year to ensure that it is free of chlorine before adding fish or other animals. This allows the chlorine to dissipate, thus reducing the chlorine taste. If you are especially sensitive to the taste and odor of chlorine, try keeping an open container of drinking water in your refrigerator. What customers can expectĭepending on your usage patterns and location within the distribution system, it may take up to a week for your drinking water to transition from combined to free chlorine or from free chlorine back to combined chlorine at the conclusion of the disinfection chemistry change period.ĭuring the time that free chlorine is used, you may notice a chlorine taste and odor in your drinking water. By switching to free chlorine, the biofilm is “shocked” and weakened. The use of free chlorine for this short period of time also helps control biological film, known as biofilm, which is found in all water pipes and can lead to water quality problems if not controlled. This also enables the Town to test and perform routine maintenance on the more than 800 fire hydrants within its service area. Water mains are flushed by opening fire hydrants and allowing the water to flow freely for a short period of time. Free chlorine is somewhat more volatile than combined chlorine, which allows it to react with sediments suspended during flushing. During the flushing program period, chlorine is added in an uncombined state, commonly referred to as free chlorine. This allows Vienna and others in the Fairfax Water service area to perform annual fire hydrant flushing.ĭuring most of the year, chloramine, also known as combined chlorine, is added to the water as the primary disinfectant. The Town's flushing program happens at the same time that Fairfax Water Authority switches from chloramines to free chlorine for water treatment during a brief period each year. Temporary change to treatment with free chlorine In 2021, flushing will take place from 10 pm-7 am March 26-May 21. To help maintain a high standard of water quality and ensure proper and efficient operation of fire hydrants, the Town of Vienna flushes water mains in its distribution system each spring.