Our water quality goal is to protect public health and safety.

In order to ensure the water is free of harmful bacteria and other microorganisms, levels of chlorine that meet State and Federal guidelines are added to the water distribution system, which can range from 0.2- 4 parts per million (PPM).

Woman washing fruit in a sink

About Chlorination

The District chlorinates all water wells to a target level of 0.8 to 1.2 ppm and tries to maintain storage reservoirs at this level.

We are required to maintain chlorine levels at every point in the water distribution system as proof that the entire system is protected against harmful microorganisms.

Many people are able to taste or smell extremely low concentrations of chlorine in water and may be able to detect the levels we try to maintain in our water system. In order to keep an adequate chlorine residual throughout the water system customers who are located closer to the treatment location may detect some chlorine taste and odor. The District strives to balance the need for ensuring adequate protection for the drinking water against the possibility of customers experiencing chlorine taste and odor.

Plumbing system

Activities related to the process of maintaining water quality.

A man kneeling with a water sample in hand.

The District made enhancements to its Surface Water Treatment Plant, known as Plant 134, to include Granular Activated Carbon (GAC) technology. GAC is proven technology that serves as an additional treatment process to further remove a wide range of contaminants from drinking water. This process is highly effective at capturing organic material using activated carbon to attract and adsorb contaminants as water flows through it. 

Water Main Flushing is a process in which pipes are cleaned by forcing water through at high speeds. Flushing removes sediment that can cause water to appear dirty or discolored, helping to improve the water’s taste and appearance. East Valley Water District water quality staff will open fire hydrants and allow water to flow out uninterrupted for 5-10 minutes. This is an important part of maintaining a healthy drinking system.

Water storage is an important part of the District's water distribution system. The District currently maintains approximately 30 Million Gallons of potable water storage. This storage capacity allows the District to provide surplus water for fire protection and maintain water delivery during emergencies. Recently, the District has added some tank mixing equipment to multiple tanks to improve water quality and reduce water age to ensure the water delivered to our customers is reliable and uniform in quality.    

Valve exercising allows the District to isolate areas for necessary repairs in the event of an emergency and are an important element to maintaining the distribution system. To ensure proper operation, valves are routinely exercised. During this process, it may be necessary to flush the lines to eliminate any particles that may have collected in the valve.

Contact Information

Mike Hurst
Water and Wastewater Compliance Supervisor

Email the Compliance Supervisor