STATE

MAXIMUM NOISE LEVEL

LEVELS AND STANDARD MUFFLING

ALTERATION LAW

Alabama

Yes

86 dB and Marine Police Standards

Yes

Alaska

No

NA

No

Arizona

Yes

86 dB, SAE J-1970

No

Arkansas

No

NA

No

California

Yes

86 dB pre-January 1976; 84 dB pre-January 1978; 82 dB post-January 1978

No

Colorado

Yes

86 dB(A scale)

Yes

Connecticut

Yes

SAE J-2005 90 dB(A scale) prior to January 1993;
88 dB(A scale) after January 1993; SAE J-1970 75 dB(A scale)

Yes

Delaware

No

NA

No

District of Columbia

No

NA

Yes

Florida

Yes

90 dB(A scale) at 50 feet

No

Georgia

No

NA

Yes

Hawaii

No

NA

No

Idaho

Yes

J-1970 75 dB(A scale), J-2005 90 dB(A scale) pre-November 1995;
88 dB(A scale) post-November 1995

Yes

Illinois

Yes

SAE J-2005 90 dB(A scale); J-1970  75 dB(A scale)

No

Indiana

No

NA

Yes

Iowa

Yes

86 dB(A scale) at 50 feet minimum

No

Kansas

No

NA

No

Kentucky

No

NA

No

Louisiana

Yes

Must be adequately muffled

No

Maine

Yes

SAE J-2005 90 dB(A scale); J-1970  75 dB(A scale)

Yes

Maryland

Yes

SAE J-2005 90 dB(A scale)

Yes

Massachusetts

Yes

Federal standards

Yes

Michigan

Yes

SAE J-2005 90 dB(A scale) or J-1970  75 dB(A scale)

Yes

Minnesota

Yes

82 dB(A scale) J-1970, post-January 1982; 84 dB(A scale)pre-January 1982

Yes

Mississippi

No

NA

No

Missouri

Yes

90 dB(A scale) J-2005 at 1 meter or J-1970  86 dB(A scale)

Yes

Montana

Yes

86 dB, SAE J-2005

No

Nebraska

No

NA

No

Nevada

Yes

86 dB(A scale)

No

New Hampshire

Yes

Manufactured before 1977, 86 dB(A scale) j-1970, manufactured between 1978 & 1981, 84 dB(A scale), manufactured after 1981, 82 dB(A scale)

Yes

New Jersey

Yes

90 dB(A scale)

Yes

New Mexico

Yes

Reasonable level

Yes

New York

Yes

SAE J-2005 90 dB(A scale); J-1970  75 dB(A scale)

Yes

North Carolina

No

NA

Yes

North Dakota

No

NA

No

Ohio

Yes

SAE J-2005 90 dB; J-1970  75 dB(A scale)

No

Oklahoma

NA

NA

Yes

Oregon

Yes

90 dB(A scale) J-2005 pre-January 1993; 88dB(a scale) post-January 1993

No

Pennsylvania

Yes

J-2005 88 dB(A scale)

Yes

Rhode Island

No

Reasonable level

Yes

South Carolina

No

NA

No

South Dakota

No

NA

No

Tennessee

Yes

86 dB at 50 feet

Yes

Texas

No

NA

No

Utah

Yes

For boats 1993 or older, 90 dB(A scale); 1994 or newer, 88 dB(A scale)

Yes

Vermont

Yes

82 dB, J-1970

Yes

Virgin Islands

No

NA

Yes

Virginia

No

NA

Yes

Washington

Yes

J-1970 75 dB(A scale); J-2005 90 dB before January 1994; 88 dB after January 1994

Yes

West Virginia

No

NA

Yes

Wisconsin

Yes

86 dB(A scale) J-1970, J-2005

Yes

Wyoming

No

NA

Yes