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Environmental Protection Agency

The Environmental Protection Agency (EPA) has long recognized environmental noise as a public health concern, noting that exposure to excessive or chronic noise is not merely an annoyance but can adversely affect physical and mental well-being.

Early EPA guidance identified a range of outcomes linked to noise exposure, from noise-induced hearing loss (NIHL) to broader health and welfare effects such as sleep disturbance, interference with speech and communication, and stress-related impacts.

To support public understanding and policy, the EPA recommended community noise levels intended to protect public health and welfare (for example, 45 dB for quiet indoor environments, 55 dB for outdoor activity areas, and 70 dB to prevent hearing damage).

Beyond auditory effects, EPA materials and subsequent public-health research have emphasized that repeated or prolonged noise exposure can contribute to physiological stress responses and sleep disruption. Chronic noise exposure has been associated in the broader scientific literature with elevated stress hormones, increased blood pressure, and disturbed sleep patterns—factors linked to increased risks of hypertension and cardiovascular disease.

Following the Noise Control Act of 1972, later scientific reviews and guidelines built on this foundation, reinforcing that environmental noise can have measurable impacts on health, sleep quality, stress levels, and daily functioning.