The proposed study will be a stepped-wedge RCT that will be implemented in 20 MAR communities All 20 MAR communities will gradually have access to MAR water, but their access will be at different time periods or steps. Therefore, each MAR site will contribute data for both the intervention and the control time periods. There will be five, monthly steps in the stepped wedge trial. In the first monthly step, none of the communities will have MAR water available for drinking and the baseline information will be collected from all communities. During each subsequent month, five MAR communities will be randomly assigned to receive the intervention. In the last (fifth) monthly step, all the communities will have access to MAR drinking water. Blood pressure of all enrolled participants will be measured during each step. Animal and human studies suggest change in salt load changes blood pressure within few hours, and a meta-analysis of randomized trials suggest modest reduction in salt intake for four or more weeks causes significant reduction in blood pressure at the population-level. Therefore, the investigators will use an interval of at least one month between access to MAR water and first post-intervention blood pressure measurement, and between two consecutive blood pressure measurements.