MARS Planning & Engineering Services emerges as L1 bidder for preparation of DPR for Saraswati River Pollution Abatement Project in Kolkata, West Bengal May 14, 2026 | Awarded, Key Segments, Municipal Wastewater, Project Updates, Wastewater MARS Planning & Engineering Services Private Limited has emerged as the lowest (L1) bidder for preparation of Detailed Project … This content is restricted.