Our water now meets the EPA s regulations for lead and copper. Maplewood Wells Water Starting June 1999, the City began to provide a portion of the Renton Highlands with drinking water from the Maplewood wells located on the Maplewood Golf Course. The Maplewood wells tap a different and deeper water source, or aquifer, than the Downtown wells. The City disinfects Maplewood water with chlorine which reacts with naturally occurring ammonia to form chloramines. Chloramines act as a secondary disinfectant to destroy any harmful bacteria that may enter the water distribution system.
Sodium fluoride is added to prevent tooth decay.
Sulfuric acid and sodium hydroxide are also added to remove hydrogen sulfide. Although the Maplewood water supply meets all health-related water quality standards, it contains low levels of manganese that can stain plumbing fixtures, dishwashers and sometimes clothing. To reduce manganese precipitation, ortho polyphosphates are added to the water. The City has recently completed a study and field testing to determine options for additional treatment methods to improve the aesthetic quality of the Maplewood water. We are planning for the construction of an additional treatment facility within the next several years subject to the availability of funding.