This article examines incidents in which the miracle-working properties of a source of water or other substance are discovered, thereby sparking unauthorized visits by hundreds or thousands of people to gain access to it. The article examines: the meanings of holy water and the motivations of those who set off in search for it; the sociological dimension of these quests; the extent to which such episodes were a deliberate attempt by enemies of the regime, principally redemptive religious sects (huidaomen), to sow disorder; the reaction of the authorities to outbreaks of holy water fever and the measures they took to deal with it; and what such outbreaks reveal about the nature of the local state and about popular attitudes to it in the first decade-and-a-half of the People's Republic of China.