Cow protection groups have been reported to engage in acts of public violence against Dalit and Muslim caste labourers. In the context of these occurrences, this article explores the relationship between caste identity and performing “stigmatised” labour—sanitation, removing refuse, and collecting urban waste—in colonial Bombay. The idea of dirt as a cultural category is not new; it is part of a hereditary system that imprints physical and moral impurity on its actors. The attacks on select castes today are part of a Hindutva ideal to purify India and remake it as a caste Hindu nation.