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Water Division

The Water Division produces and distributes drinking water.  The City’s water treatment plant is located along Elm Point Road and produces about 40 percent of our drinking water needs.  A pump station located in Heritage Landing Subdivision provides us with water produced by the City of Saint Louis—about 60 percent of St. Charles’ drinking water.  Water Division maintains and repairs the City’s water mains, reads water meters, and maintains the treatment plant, pumping stations, and water tanks.

The Water Division is a full service utility of the City. We have the responsibility for:

  • pumping the water out of the ground
  • sending it to the treatment plant
  • treating the water to the highest quality standards
  • testing the water
  • delivering the water to the homes and businesses
  • tapping water mains for new water services
  • repairing water main breaks
  • color coding fire hydrants with various colors to indicate available flow
  • assisting customers troubleshoot internal water problems
  • staffing the water plant 24 hours a day, seven days a week
  • maintaining operator certification by attending numerous technical classes each year

Water Quality

The Water Division is charged with providing pure, safe drinking water to the public. The rules, regulations and guidelines followed are established and monitored by the Environmental Protection Agency (EPA), the Missouri Department of Natural Resources (MDNR) and the Missouri Department of Health (MDOH). Annual, semi-annual, quarterly, monthly, weekly, daily and hourly water samples are taken and are either sent in to any number of certified laboratories selected by the State, or are analyzed in the laboratory at the Elm Point Water Treatment Plant and Pumping Station. The water division is responsible for issuing the annual Water Quality Report. Click here to open the 2012 Water Quality Report (PDF file).

Water Treatment Facilities

The Elm Point Water Plant is a ground water treatment plant which receives its water from shallow gravel packed wells. Each well is capable of pumping 1½ million gallons of water per day (gpd). The water is delivered to the treatment plant via 11,000 feet of a 24" transmission main.

Once the untreated water reaches the plant, it passes a number of treatment processes. We first aerate it to remove a number of the chemicals which cause hardness in water. These chemicals are Carbon Dioxide, Hydrogen Sulfide and Iron. We then add lime to the water to facilitate the softening process. This enables the customer to reduce the amount of soap needed to wash laundry, dishes and for hygienic purposes such as baths and showers. We also add sodium hypochlorite to disinfect the water and Sodium Hexametaphosphate which lines the inside of the water mains to help reduce scaling.

The plant was originally constructed in 1963 with a design of 3 million gallons per day (mpd). With the increasing growth in the mid 60's, the city soon realized that the Elm Point Water Plant, along with the former Main Street Water Plant, would be unable to adequately meet the demands and needs of a growing community. In the late 60's, the city determined it was necessary to double the treatment and pumping capacity of the Elm Point Plant. Construction was completed in 1968 which enabled the plant to pump 6 mgd.

With the explosive growth in the late early 80's, it was obvious the city would soon be facing a dilemma with the possibility of not being able to supply sufficient quantities of water to the community. As a matter of coincidence, our neighbors to the west, the City of St. Peter’s, was facing the same pains of a rapidly growing community as we were. They too were having problems meeting the demands of their customers. The City of St. Charles and the City of St. Peter’s entered into an agreement to hire an engineering firm to study the current and future supply and demand needs of the two communities.

A number of options were made, but the most favored was a plan which was coined the, “Joint Venture” project. This plan provided for the construction of a common pipeline which would deliver water from the City of St. Louis, to a pumping station located in the Heritage subdivision. Both St. Charles and St. Peter’s would share in the overall cost of the project, each paying a predetermined amount equal to the average size of the water distribution system and number of customers served. It was estimated that the City of St. Charles would pay approximately ⅔ of the overall project cost and future maintenance, with the City of St. Peter’s paying the remaining ⅓ of the costs.

In 1985, construction was started on the Heritage Pumping Station. On March 17, 1987, the valves were opened and water started flowing to the customers south of I-70. Between the Elm Point Water Treatment Plant and Pumping Station and the Heritage Pumping Station, we have the capability to pump more than 18 million gpd. Other than an occasional power failure, or planned shutdown, both the Elm Point Plant and Heritage Pumping Station have been in continuous operation since their initial startup. Currently 40% of the City's potable water is produced at the Elm Point Water Plant and 60% is purchased from the City of St. Louis via the Heritage Pumping Station.

Contact Information
Elm Point Water Treatment Plant
3600 Elm Point Road
St. Charles, MO 63301

Phone: (636) 949-3366

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