Info

schools, etc.

Source: U.S. Environmental Protection Agency, 1974, Information on levels of environmental noise requisite to protect public health and welfare with an adequate margin of safety, EPA/550-9-74-004 (U.S. Environmental Protection Agency). *Based on annual averages of the daily level over a period of 40 years.

Source: U.S. Environmental Protection Agency, 1974, Information on levels of environmental noise requisite to protect public health and welfare with an adequate margin of safety, EPA/550-9-74-004 (U.S. Environmental Protection Agency). *Based on annual averages of the daily level over a period of 40 years.

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