Association of HBP with drinking water salinity and study rounds (seasons) in the 35 years and above age group. Seasonal variation of HBP is visible in the three rounds. Though the socio-economic information were collected for a four months recall period in HH survey, however blood pressure and drinking water salinity were measured in a point time. The data collection periods were for Round 1: June/July, 2014, Round 2: October/November, 2014 and Round 3: March, 2015. Gradual increase in HBP is visible which coincide with Bangla seasons representing pre-monsoon to dry season in one year timeframe. Highest level of prehypertension and hypertension were found in dry season with moderate saline drinking water category. DOI: https://doi.org/10.1525/elementa.143.f6