Granite Rock Co is a superfund site located at West Of Hwy 33, Coalinga, CA 93210. The Environmental Protection Agency (EPA) identifies sites such as Granite Rock Co because they pose or had once posed a potential risk to human health and/or the environment due to contamination by one or more hazardous wastes. Granite Rock Co is currently registered as an Archived superfund site by the EPA and does not require any clean up action or further investigation at this time.