In unincorporated Lake County, Indiana a person in an industrial zone (I-1) may not cause boundary noise to exceed 66 dBA at all times (Code § 93.03(A)(3)). Industrial operations also may not create earth-shaking vibrations perceptible without instruments beyond the industrial zone boundary.
Lake County Code § 93.03 sets a 66 dBA boundary limit, applicable at all times, for a person located in an industrial zone (defined as zone I-1). Where an industrial property abuts a lower-zoned parcel, the boundary rule provides that the lower limit (55 dBA) applies. Section 93.03(C) additionally bars a person in an industrial zone from making earth-shaking vibrations perceptible without instruments beyond the boundary of the industrial zone in which the source is located. Appendix B to Chapter 93 breaks the industrial dBA cap into octave-band SPL limits. Heavy industry is prominent in Lake County (the Region's steel corridor), but this county chapter governs only unincorporated land; the major mills lie within incorporated cities that apply their own
Industrial noise exceeding the § 93.03 limits, or prohibited industrial vibrations, are punished under general penalty § 10.99 and enforced by the Lake County Police Department through Lake Superior Court, County Division.
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