Northwich nôrth´wĭch [key], town (1991 pop. 32,664), Cheshire West and Chester, W central England, at the confluence of the Weaver and Dane rivers. Northwich was once the center of England's salt production; however, the manufacture of chemicals has become its leading occupation. It was the site of a Roman station. The rock-salt fields were used even before the Christian era. Noteworthy is the Northwich salt museum.

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