HNB Engineers emerges as L1 bidder for implementation of 20 mgd Yamuna Vihar Phase I STP Project in Delhi July 15, 2026 | Awarded, Key Segments, Municipal Wastewater, Project Updates, Wastewater HNB Engineers Private Limited has emerged as Lowest (L1) bidder for the implementation of 20 mgd Yamuna Vihar Phase I … This content is restricted.