There are, owing perhaps to the proximity of Lima, few industrial establishments in the city; among them are a large sugar refinery, some flour-mills, a brewery, a factory for making effervescent drinks, and a number of foundries and repair shops.
A refinery was attached to the London Mint from 1816 to 1851, but was then let on lease and left to private enterprise.
A modern sugar-mill and refinery at Sincerin, 28 m.
There is one large refinery at Villa del Mar, however, which imports raw cane sugar from Peru for refining.
The mud from the Ysel furnishes the material for large brick-works and potteries; there are also a celebrated manufactory of stearine candles, a yarn factory, an oil refinery and cigar factories.