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It's the Law

Mufflers and Noise Limits


All vessel engines must have an effective, permanently installed muffling system that cannot be bypassed.

  • Vessels built before January 1, 1995, must not exceed 90 dB(A) using the stationary test.
  • Vessels built on or after January 1, 1995, must not exceed 88 dB(A) using the stationary test.
  • While operating on lakes and rivers wider than 500 feet, it is unlawful to exceed 75 dB(A) as measured from shore.

Contact your local sheriff’s department for a free screening of your vessel’s noise.