This study looked at the number of viable bacterial cells relative to the total number of bacterial cells in fog water collected in Santa Cruz, CA in 2025. Little is known about the biological composition of fog water despite its importance for predicting future impacts on biogeochemical cycles in the atmosphere and ecosystem connectivity under projected shifts in fog regimes due to climate change. Our preliminary data showed that fog-water microbial viability (as a percentage of total cell abundance) ranged from 27-41% with a median of 30% and an average of 32%. These results are similar to seawater (~30-35%) and sea-spray (~28%) and higher than in dust aerosols (~20%).