Where were textile mills built in 1840s?

In the 1840s, textile mills were primarily built in the northeastern United States, particularly in states like Massachusetts, Rhode Island, and Connecticut. These locations featured rivers and streams that provided the necessary water power for machinery. The growth of the textile industry in these areas was fueled by the availability of labor, including immigrants, and the establishment of factory towns. Additionally, the region's proximity to raw materials, such as cotton, contributed to the expansion of textile manufacturing.