insalubrious

adj

1. Unhealthful, not providing or promoting health.

   “What in the name of Common Sense is to recommend Brinshore?—A most insalubrious Air—Roads proverbially detestable—Water Brackish beyond example, impossible to get a good dish of Tea within 3 miles of the place—& as for the Soil—it is so cold & ungrateful that it can hardly be made to yeild^([sic]) a Cabbage.”

   “But while the were a few pockets of the city centre that were desirable places in which to live, for the most part London's traditional areas were overcrowded and insalubrious.”