The Water and Light division of Municipal Services would like to provide you the following notices:
August, 5th 2019 Notice
-Chad Renly, Municipal Services Director
The City has received a number of concerns over the quality of the City’s water.
The City takes water quality very seriously, samples are taken from around the city weekly to ensure the safety of our water. These tests are done in compliance with DNR water quality standards. No tests have come back to date showing a need for concern.
The discolored water is caused by a natural occurring mineral known as manganese. It is very prevalent in the aquafer from which we draw our water supply. Similar to iron, manganese will oxidize when exposed to air and become rusty in color. As water is extracted from the wells a blended phosphate known as Aqua Mag is added to the water to keep the manganese from oxidizing. The manganese is always present in the water but can settle out to a low spot in a pipe or at the end of a main line. These settled areas are where the Aqua Mag wears off and the manganese will oxidize. These low laying or end of the line areas can become stirred back up into the main water when a large draw of water is used or a shift in the water happens. When these areas are stirred up people will experience the discolored water.
The reason for recent disturbances or this manganese being stirred up is because of recent work done to the system.
· Wells 1 & 2, located on the east side of the city, have been operational and feeding the entire city while Well 3 on the west side has been shut down for maintenance. With well 3 being offline water is being moved from the east side of the city all the way to the west, creating a higher chance for the manganese to be stirred up.
· Second St. is moving toward the end of its reconstruction project, part of this project was the replacement of its water main. In order to replace pieces of this pipe water valves need to be frequently turned off and on again, this action of stopping and starting water would also stir up deposits of the Manganese sending it into the general water flow.
· Lastly the city’s middle school is currently under construction. During the demolition process they spray a large amounts of water across the debris in order to keep dust from flying around the city helping to improve air quality during this process. These surges in water, similar to a fire department drawing off of a hydrant to put out a fire, can also stir up the Manganese in the water mains.
The city will be flushing the water hydrants around the City in approximately 4 weeks, this helps break those areas up and flush the manganese out of the system, this process is completed twice per year. Residents should start to see things returning to normal as we have all 3 wells running and water related projects come to an end.
Hydrant and Main Flushing Fall 2019
Evansville Water & Light has wrapped up scheduled Hydrant and Main Flushing for 2019. Please stay tuned for Spring 2020 dates.
Water Main Flushing Information
Why is Flushing Our Water Mains Important?
Over time, sediment and deposits, including rust and mineral particles, can accumulate naturally at the bottom of the water main. A build-up of bacteria known as 'biofilm' can also coat the pipe's inner surface. The combination of sediment and bacteria can restrict water flow in the pipes and contribute to pipe corrosion. Periodically flushing water mains removes the sediment and biofilm buildup, as well as maintaining our water infrastructure and assuring consistent, high quality drinking water.
Is Flushing a Waste of Water?
No. The water that discharges from the hydrant during the flushing process is diverted into a storm sewer drain that carries the water back to into the infrastructure. Any overall increase in the amount of water used in flushing is a small price to pay in maintaining water quality and the integrity of the piping system.
How Will This Affect Water Customers?
Flushing operations occur between 7:00 am and 3:30 pm, Monday through Friday, during the spring and fall months. Flushing a section of pipe can take the crew anywhere from a few minutes to over an hour to complete, though it should typically last for about 30 minutes.
Whenever possible, please refrain from using tap water while our crews are flushing the water mains on your block. If you use water while we are flushing, you may experience low water pressure or a temporary loss of water pressure. These conditions are temporary and normal pressure should resume when the crew has completed their work. You may also notice cloudy or discolored water. Wait until flushing operations are complete, then flush the LOWEST LEVEL COLD WATER FAUCET for 5-10 minutes. It is important to flush only the cold water faucet as we want to avoid any discolored water from entering your hot water heater. It is also important that you postpone laundry activities until we have completed flushing and you have thoroughly flushed your faucet and confirmed that your water is clear.
What if I Encounter a Flushing Operation?
It is important to be aware, stay alert and slow down when you are driving or walking past a flushing operation. Though crews will try to direct the water away from pedestrians and traffic, when encountering flushing operations in the city, please proceed cautiously or attempt to avoid these areas.
The smart meter installation process has begun. Here at Evansville Water & Light we will install your smart meter at no extra cost and the installation only takes about 15 minutes so you'll be up and running in no time. Call today to schedule yours. For more information on these 'smart meters' click here.