Water Treatment Plant - WTP

The Water Treatment Plant (WTP) operates 365 days a year and produces approximately 3,000,000 gallons per day. The WTP delivers high quality drinking water to more than 5000 people in the City of Woodland. The City’s water comes from an aquifer beneath the North Fork of the Lewis River and is collected by a series of pipes horizontally placed under the river. The water collection is called a Ranney Collection well. The Lewis River watershed is fed by glacier melt from Mt. Adams and smaller tributaries such as Cedar Creek. The Lewis River is one of the cleanest and most pristine rivers in the region; however, the source is naturally high in iron.The water is then pumped and delivered to the WTP, which is located adjacent to the City’s water reservoirs, at the top of Scott Hill Road. All chemical treatment is done at the treatment plant which includes chlorination for disinfection.

The City of Woodland Water Filtration Plant began operation in late May of 1999. The filtration plant uses chlorine for the disinfection and the oxidation of iron.  Soda ash is also used for corrosion control (which reduces lead and copper solubility) and to increase the PH. In addition to iron removal, the treatment process also reduces turbidity, color and disinfection using chlorine to remove harmful pathogens and viruses.  The City also monitors for other contaminants, which may include pesticides, herbicides, radioactive contaminants, organic, and inorganic contaminants.

The City of Woodland supports the consumer’s right to know the results of our water quality monitoring and encourages public participation in decisions which affect your drinking water.  We report to the Department of Health (DOH) and the Environmental Protection Agency (EPA). Our water is monitored and tested daily by certified water treatment personnel and also regularly tested through certified laboratories. The City of Woodland’s drinking water meets or exceeds the DOH and EPA water quality requirements and complies with state and federal requirements.  You can check out any of our sampling results by visiting this Department of Health link listed below.

WEB LINKS

Department of Health - Water Sample Results