"Water Treatment Plant" may refer to the following:
- Water treatment plant - A treatment plant under the Umbrella R&D Center, explored in 2004's Resident Evil Outbreak File #2.
- Raccoon City waterworks - A plant under Raccoon University, explored in 2003's Resident Evil Outbreak.
- Arklay treatment plant - A plant near NEST, explored in 2002's Resident Evil 0.
- Sewage treatment plant - A facility in Raccoon City explored in 1998's Resident Evil 2.