Take context from the input text and decide on the accurate relationship between 'water treatment' and 'water' from the options provided.
Options: product/material produced, operator, business division, platform

It boasts of a sewage treatment plant of 600 KLD, which is based on environment-friendly extended aeration technology, water treatment plant, rain water harvesting and re-use of treated water for flushing and gardening.
product/material produced