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Noise Pollution Laws

What are the motorcycle exhaust noise limits in each state?

Noise standards (for motorcycles or cars) vary from state to state. Below is a list of these standards, by state. This list is for informational purposes, and you should note that these laws change from time to time, so it's always a good idea to verify your state and local laws if you are planning to modify the exhaust on your motorcycle. Also note that city, municipal, and local governments may have their own laws!

All sound measurements are taken at distance of fifty feet from center lane of travel, unless otherwise noted.

Click the following link for more information on enforcement of noise regulations in California.

Alabama

No laws specifically providing noise limits

Alaska

?

Arizona

Max sound levels:
Pre- 1972: 0-35mph, 84dba; 35-45mph, 88dba; 45mph +: 88dba;
1972-1980: 0-35mph, 79dba; 35-45mph, 82dba; 45mph +, 86dba;
After 1980: 0-35mph, 76dba; 35-45mph, 80dba; 45mph + 83dba

Arkansas

No laws specifically providing noise limits

California

Max sound levels:
1)Pre-1970: 92dba;
2) After 1969, and before 1973: 88dba;
3) After 1972, and before 1975: 86dba;
4) After 1974, and before 1986: 83dba;
5) After 1985...80dba

Colorado

Local authorities may adopt following maximum sound levels:
1)Pre- 1973: 88dba at 35mph or less; 90dba at 35 to 55mph;
2) Post 1973: 86dba at 35mph or less; 90dba at 35 to 55 mph

Connecticut

Max sound levels:
Model Year/0-35mph/35mph+
Pre-1975/82dba/86dba;
1975 and later/80dba/84dba

Delaware

Max sound levels, based on measurements taken at a distance of 50 ft from center lane of travel or 20" from exhaust outlet:
1) 1 - 35mph: 78-80dba;
2) 35mph+ : 82-84dba;
3) Idle from 50 feet: 78-80dba;
4)Idle from 20 feet: 95dba

Florida

Max sound levels:
1) Pre-1979: 82dBA (35mph or less); 86dBA (over 35mph)
2)Post 1979: 78dBA (35mph or less); 82dBA(over 35mph)

Georgia

No laws specifically providing noise limits

Hawaii

?

Idaho

Max sound level measured at 20 feet is 92dBA

Illinois

Max sound levels:
80-82dBA at less than 35mph; 86dBA at more than 35mph

Indiana

No laws specifically providing noise limits

Iowa

No laws specifically providing noise limits

Kansas

No laws specifically providing noise limits

Kentucky

No laws specifically providing noise limits

Louisiana

No laws specifically providing noise limits

Maine

No laws specifically providing noise limits

Maryland

Max sound levels:
1)1975-1978: 82-86dBA
2)after 1979: 78-82dBA

Massachusetts

Max sound levels:
82dBA at 45mph or less; 86dBA over 45mph.
Stationary noise levels: at 1/2 redline speed: 99dBA (for 1986 +); 102dBA (for pre-1986)

Michigan

Max sound levels:
86dBA at speed over 35mph; 82dBA at speed less than 35mph; 95dBA under stationary run-up test at 75 inches.

Minnesota

Max sound levels:
80-90dBA measured at 50 feet.

Mississippi

No laws specifically providing noise limits

Missouri

No laws specifically providing noise limits

Montana

Max sound levels:
1)pre-1970: 92dBA; 2)1969 to 1972: 88dBA;
3)1973 to 1974: 86dBA; 4)1975 to 1977: 80dBA;
5)1978 but prior to 1987: 75dBA; 6) post 1987: 70dBA

Nebraska

No laws specifically providing noise limits

Nevada

Max sound levels:
1) 82dBA for 0- 35mph; 2) 86dBA for 35mph+

New Hampshire

Max sound level:
106dBA measured 20 inches from the exhaust at a 45 degree angle

New Jersey

No laws specifically providing noise limits

New Mexico

No laws specifically providing noise limits

New York

Max sound level:
35 mph or less, 82 dB(A); over 35 mph, 86 dB(A)

North Carolina

No laws specifically providing noise limits

North Dakota

Motorcycles must meet noise requirements as established by EPA

Ohio

Local authorities may adopt max sound levels of:
1) 82dBA at 0-35 mph; 2) 86dBA at 35 mph +.

Oklahoma

No exhaust modification that increases noise.

Oregon

Max noise levels at 20 inches:
1) Pre- 1975: 102dBA; 2) 1975 and later: 99dBA

Pennsylvania

Max sound levels: 84dBA at 0-35 mph; 88dBA at 35mph +

Rhode Island

Max sound levels:
1)86dBA at 0-35 mph; 2)90dBA at 35 mph +

South Carolina

No laws specifically providing noise limits

South Dakota

No laws specifically providing noise limits

Tennessee

No laws specifically providing noise limits

Texas

No laws specifically providing noise limits

Utah

No laws specifically providing noise limits

Vermont

No laws specifically providing noise limits

Virginia

No laws specifically providing noise limits

Washington

Max sound levels:
1) 78dBA at 0-45mph; 2)82dBA at 45mph+
Stationary 20" standard (pre-1986): 99dBA

West Virginia

No laws specifically providing noise limits

Wisconsin

No laws specifically providing noise limits

Wyoming

No laws specifically providing noise limits

District of Columbia

Max sound levels, based on measurements taken at a distance of 50 ft from center lane of travel:
1)0-35 mph: 82 dBA

As many motorcyclists know, noise laws are selectively enforced, and can be yet another tool used by the police to harass bikers.  Don't give cops an excuse!  Make sure your bike complies with the noise laws in your area.  If you have any questions about noise laws or anti-motorcycle discrimination, feel free to send us an email or give us a call.  And, as always, if you or a loved one have been involved a motorcycle accident, our motorcycle accident lawyers are here for you: we handle motorcycle accident cases throughout California.

The information on this website is for general information purposes only. Nothing on this site should be taken as legal advice for any individual case or situation. This information is not intended to create, and receipt or viewing does not constitute, an attorney-client relationship. Riderzlaw is a trademark of Marcereau & Nazif.