SF is dirty where all the startups are: SOMA/Mission. The tenderloin is also grimy. The rest of SF is as clean as any dense city. The neighborhoods west of Divi

SF is dirty where all the startups are: SOMA/Mission. The tenderloin is also grimy. The rest of SF is as clean as any dense city. The neighborhoods west of Divisidero are no dirtier than say, Cambridge, MA.