Aircraft departing San Francisco International Airport make the Serramonte neighborhood Daly City's main aircraft-noise area, with flyovers reaching 85-95 dBA. Municipal Code Section 15.00.130 requires homes built after 1993 within the FAA-approved 65 CNEL contour to be insulated to FAA program standards.
Daly City's 2030 General Plan Noise Element identifies SFO, about six miles southwest, as a principal noise source: background levels in Serramonte are 50-55 dBA Leq, but westbound departures produce brief maximums of 85-95 dBA Lmax, and the measured CNEL there is 70 dBA. Municipal Code Section 15.00.130 requires any home constructed after 1993 within the 65 CNEL (FAA-approved) contour of the Aircraft Noise Soundproofing Project Area Map to be insulated to standards used in FAA-supported noise insulation programs. Regionally, C/CAG, acting as the Airport Land Use Commission, adopted the SFO Airport Land Use Compatibility Plan in November 2012; Airport Influence Area B covers much of westerly Daly City, where development is reviewed for ALUCP consistency and avigation easements may be required for conditionally compatible uses at CNEL 65 dB or greater.
Aircraft in flight are federally regulated, so the City cannot cite overflights; enforcement operates through land-use controls, including denial of inconsistent projects in Airport Influence Area B, required avigation easements, and the Section 15.00.130 insulation requirement at building permit stage.
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Daly City, CA
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