Han's Technologies, Inc. (HTI), Western Water's Oakland-based parent company, has been building plants in China since 1998. Han's engineers have in total built ten (10) state of the art wastewater treatment plants (WWTPs) including BOTs owned and operated by Western Water Group. Most plants use Han's SBR, and they have a cumulative total capacity of over 1,000,000 m3/day (265 MGD).

·Xi-tang BOT WWTP,Zhejiang
·Yin-chuan first WWTP, Ningxia
·Xiao-he WWTP (I), Guizhou
·Bao-an WWTP, Shenzhen
·Long-gang WWTP, Shenzhen
·Nan-shan WWTP, Shenzhen
·Qin-zhen WWTP, Guizhou
·Hua-xi WWTP, Guizhou
·Mei-xian WWTP, Guangdong
·Zhen-yuan BOT WWTP,Guizhou

In addition, as Phase I of the "Guizhou Environmental Improvement Project" (GEIP), Western Water has built and owned the following water treatment plants and relevant water supply piping systems in China's Guizhou province.

· Qian-xi BOT Piped Water System, Guizhou
· Na-yong BOT water supply System, Guizhou
· Zhi-jin BOT Piped Water System, Guizhou
· He-zhang BOT Piped Water System, Guizhou
· Da-fang BOT Piped Water & Reservoir, Guizhou