The use of existing water resources and sustainability problems as a result of global warming and climate change became an even bigger problem with the importance of hygiene during the COVID-19 pandemic. In this research, the water consumption behavior will be researched and the correlation between water consumption and COVID-19 case numbers will be investigated in Bursa, Turkey. The monthly mean water consumption for 758,500 domicile subscribers using the central tariff from 2018-2020 was calculated. Results obtained using the SPSS 23 IBM program observed a 20.18% increase in water consumption in Bursa in general during COVID-19. As Bursa province has both rural and industrial urban structures, when this increase is examined on a county basis, increase rates were 10% in regions with dense industry and mean 34% in rural areas. When the correlation between case numbers during the COVID-19 period (March 2020-January 2021) and water consumption is examined, a negative correlation is notable (Pearson-Correlation=-0.616). As the case numbers increased in the continuing COVID-19 pandemic, the reduction in water consumption may be explained by warnings to citizens to reduce water use through written and oral media due to reservoir fill rates falling below 5%. These results provide beneficial information revealing the effects of COVID-19 on water consumption behavior and use of water resources in urban and rural areas.