The City is required to disinfect water before it leaves the treatment plant and maintain sufficient chlorine levels in pipes and tanks to prevent bacteria growth. Chlorine levels are monitored at multiple locations across the City to ensure that they stay between the minimum and maximum levels established by the State of Colorado and the EPA. The system is also regularly monitored for bacteria at multiple locations. The amount of chlorine remaining in the water when it reaches a home can vary depending on the how long water is in the system before it reaches the tap. Chlorine will dissipate if drinking water is left in an uncovered container in the refrigerator overnight.