San Francisco published this study on feces on public sidewalks. This is from page 11.

https://sf.gov/sites/default/files/2023-05/CY22_Street_Sidewalk_Standards_Report_05222023.pdf

About 30% of evaluated streets and sidewalks report feces.

Observations of human and animal feces were less common in the Core Citywide sample, with about 30% of evaluations observing feces on the street or sidewalk.

In contrast, almost half (47%) of evaluations in all Key Commercial Areas observed feces. At the neighborhood-level:

▪ Feces on streets and sidewalks were least likely to be found in Noe Valley and Glen Park.

▪ Feces were most common in the Tenderloin, Nob Hill, the Mission, and South of Market.