Six different maps showing the topography of areas surrounding Nambul River and Waishel Maril, major rivers flowing through the four valley districts of the State, roads, land use, hydrological and geological maps of the State have been sent to a California based scientist by Manipur Pollution Control Board MPCB for formulation of a detailed project report DPR for setting up of a Waste Water Treatment and Management Plant in the State Source Hueiyen News Service
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