This document has been prepared as a planning and reference guide for public administrators of environmental noise control programs. It presents a summary of noise source regulations encompassed in current state laws and local ordinances. Data have been extracted from only those laws and ordinances stipulating specific decibel levels. For the states, the laws summarized are grouped under the headings: motor vehicles, recreational vehicles, land use, and general. For localities, the headings are: motor vehicles, recreational vehicles, intrusive noise sources, stationary noise sources, construction noise, and miscellaneous noise regulations. Because of the many variations among local jurisdictional regulations, no attempt was made to list the specific noise level requirements for recreational vehicles, construction equipment, or land use.