There is no federal RoHS law in the United States, but compliance is required at the state level (most notably in California) for specific electronics. While not nationwide, many US manufacturers comply to meet global standards, avoid state penalties, or meet customer demands. California's RoHS law is the most similar to the EU Directive, focusing on covered electronic devices with screens larger than 4 inches.
RoHS, also known as Lead-Free, stands for Restriction of Hazardous Substances. RoHS, also known as Directive 2002/95/EC, originated in the European Union and restricts the use of six hazardous materials found in electrical and electronic products. All applicable products in the EU market after July 1, 2006 must pass RoHS compliance. RoHS impacts the entire electronics industry and many electrical products as well.

Lead (Pb): < 1000 ppm
Mercury (Hg): < 100 ppm
Cadmium (Cd): < 100 ppm
Hexavalent Chromium: (Cr VI) < 1000 ppm
Polybrominated Biphenyls (PBB): < 1000 ppm
Polybrominated Diphenyl Ethers (PBDE): < 1000 ppm