Comparative Trends in Complaint Counts for Offensive Odor, Noise, and Air Pollution Before and During/After COVID-19, and Operational Issues in Complaint Statistics

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This research aims to compare trends in complaints about offensive odor, noise, and air pollution before and during/after COVID-19 and to identify operational issues in complaint statistics.
Utilized data from the Environmental Dispute Coordination Commission from 2017 to 2023.
Applied 12-month moving averages, seasonal indices, contribution factors, and the Kruskal-Wallis test (Bonferroni correction).
Conducted hearings in five municipalities to uncover operational challenges.
A significant increase in complaints about offensive odor and air pollution was attributed to 'open burning' and 'individual' sources during 2019-2020.
For noise pollution, there was no significant difference between contributions from 'companies/businesses' and 'individuals'.
Seasonality was confirmed, particularly related to open burning and window-opening behavior in autumn.

Comparative analysis reveals changes in complaint trends, suggesting operational improvements in complaint data management.

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FUJIKURA et al. (2026) studied this question.

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