Given the input sentence, please extract the subject and object containing a certain relation in the sentence according to the following relation types, in the format of "relation1: word1, word2; relation2: word3, word4". Relations include: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

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.

Answer: product_or_material_produced: water treatment, water