The California Department of Public Health (CDPH) warned on Thursday about bagged salad products from Ready Pac Food Inc. containing romaine lettuce that is possibly contaminated with E. coli.

The voluntarily recalled romaine lettuce is packaged in 9 oz., 9.25 oz., 10 oz., 10.25 oz., and 16 oz. bags under the Ready Pac, Trader Joe’s, Safeway and Dining In Classic labels. Products have a Use by Date of November 18, 2011.

The recall was initiated after USDA testers discovered some contamination of the product.

The recalled products were distributed to retail locations in Arizona, California, Colorado, Hawaii, Idaho, Oregon, Texas and Washington.