The Municipality of Dumangas is being supplied with potable water by the Dumangas-Barotac Nuevo Water District (DBNWD) with its main office located at P.D. Monfort North, Dumangas, Iloilo. Water sources comes from 5 Pumping Stations located at Barangays Cali, P.D. Monfort North (Lublub), Calao, Sulangan and Pagdugue capacity were turn down due to el niño phenomenon. Before Cali yields 81ps, 11lps, 15lps, 25lps now its well yields only 4lps, 6lps, 8lps, 10lps and additional of Pagdugue which 7lps respectively. Based on the capacity of these sources, there is insufficient supply of water due to higher demand, DBNWD put up a water filtration plant to augment the need of residents and future industries rises within the municipality and DBNWD utilized Jalaur River for its another source of potable water and will deliver 5,000 cum/day which is sufficient enough to the Municipality of Dumangas up to year 2021. Presently there is a total of 2,115 concessionaries in the municipality 2,072 of which are residential and institutional, 43 are commercial and industrial.
