The Richland Wastewater Treatment Plant was built in 1985 and serves approximately 62,220 residents. The plant is a 12-million-gallon-per-day complete-mix activated sludge plant. Approximately 316 miles of sewer line, maintained by the City's operational and maintenance staff, delivers Wastewater to the plant.

Learn More About the Wastewater Treatment Plant
Plant Capacity and Effluent Limits

Book a Tour

The wastewater treatment facility plant is open for one-hour guided tours. You must arrange tours in advance and they are typically held on Wednesdays.

• Groups must be no larger than 25 people
• Participants must be 10 years of age or older
• Participants under the age of 18 must be accompanied by an adult

Call to Schedule a Tour

Keep Our Sewer System Clean

Help us keep our sewer system clean. Please do not flush any cloths or paper products other than toilet paper. The following items do not break down in water and can clog sewer pipes:

• Paper towels
• Disinfecting wipes
• Baby wipes
• Tissues
• Rags
• “Flush-able” wipes

Equipment such as pumps that move wastewater through the sewer system can become damaged and cause backups. The image below shows what undissolved paper products look like in a sewer system. If you must use something other than toilet paper, please dispose of the product in the trash.

Image courtesy of the Vancouver Public Works Department and KATU News - Vancouver, Washington.

How to Dispose of Cooking Grease

Cooking grease can cause major problems in the pipes of homes, businesses, City sewer lines and pump stations. Review these tips to learn how to properly dispose of cooking grease and help keep our sewer pipes clean.

Learn How to Dispose of Cooking Grease

How to Dispose of RV Waste

The Columbia Point Marina Park has an RV pump-out station. The station is on the right-hand side of Columbia Point Drive, southeast of the main parking lot.

View a Map of Columbia Point Marina Park

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