Which borough is the dirtiest Bronx Manhattan Queens or Brooklyn?

There is no scientific or objective measure to determine which borough is the dirtiest. Perceptions of cleanliness can be subjective and may vary due to factors such as littering rates, cleanliness of public spaces, or maintenance practices. Cleanliness levels can also vary within different neighborhoods within each borough. It is also worth noting that sanitation efforts are dynamic and change over time, so what may be perceived as dirty at one point might not be the case in the future.