我市发布新版声环境功能区划方案

Core Points - The city has issued the "Xi'an Sound Environment Functional Zoning Plan (2025 Revision)" aimed at optimizing sound environment zones to improve sound quality and manage noise pollution effectively [1][2][3] Group 1: Sound Environment Functional Zones - The sound environment functional zones are categorized into five types from 0 to 4, with specific noise level limits set for daytime and nighttime [1][2] - Type 0 zones are designated for areas requiring exceptional quietness, with daytime limits of 50 decibels and nighttime limits of 40 decibels [1] - Type 1 zones include residential, medical, educational, and administrative areas, with limits of 55 decibels during the day and 45 decibels at night [1] - Type 2 zones are for mixed-use areas with commercial and residential functions, enforcing limits of 60 decibels during the day and 50 decibels at night [1] - Type 3 zones focus on industrial production and logistics, with limits of 65 decibels during the day and 55 decibels at night [1] Group 2: Area Coverage and Specifics - The total area designated for sound environment functional zones is 1,528.53 square kilometers, with specific allocations for each type [2] - Type 1 zones consist of 89 units covering 383.56 square kilometers, Type 2 zones have 114 units covering 829.48 square kilometers, and Type 3 zones include 56 units covering 309.71 square kilometers [2] - Type 4 zones are further divided into 4a and 4b categories, with 4a covering major roads and 4b covering railway lines, enforcing daytime limits of 70 decibels and varying nighttime limits [2] Group 3: Implementation and Adjustments - Areas with upgraded sound environment functional types will implement new control standards six months after the plan's enactment [3] - Areas around airports affected by aircraft noise will follow specific airport noise standards instead of the general plan [3] - Unzoned areas within the planning district can be determined using rural sound environment methods until specific zoning is established [3]