First Quarter, 1990: Sea-Tac Noise Hotline Calls per Month, 1986-1990

This chart tracks monthly calls to the Sea-Tac Airport Noise Hotline from 1986 through the first quarter of 1990, measured in thousands of calls. A notable spike is visible in mid-1987, labeled the 'Scatter Test,' during which calls peaked at approximately 3,400 in July before sharply declining. Overall call volumes in 1988 and 1989 were moderate, generally ranging between 400 and 1,700 calls per month, with summer months consistently showing the highest activity across all years.

Notes

Line chart showing Sea-Tac Airport noise hotline call volume (in thousands) per month from 1986 through the first quarter of 1990. Data series plotted for each year: 1986, 1987, 1988, 1989, and 1990 (January–March only). Notable spike labeled ‘1987 Scatter Test’ reaching approximately 3.4 thousand calls in July 1987. Chart tracks seasonal patterns in noise complaint call volume across all twelve months.

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