design, construction, supply, testing and commissioning of piped water supply schemes for left out habitations under har ghar nal ka jal nischay in areas having ground water quality issues; with electric driven pumps and iron removal treatment plant having technology (adsorption/ nano technology) of csir or certified by csir or any other technology endorsed/ approved by goi in the in the district of araria , bihar on turn-key basis with 6 months trial run after commissioning and comprehensive operation and maintenance of 60 months after successful completion of trial run period under mukhyamantri gramin peyjal nishchay yojna (quality affected) under p.h.division, forbesganj.