방류수는 대규모 처리시설 7.1%, 소규모 처리시설 20.7%로 처리 시설별 산화율의 차이가 크게 나타났다.
Discharged water was 7.1% for large-scale treatment facilities and 20.7% for small-scale treatment facilities, showing a significant difference in oxidation rates for each treatment facility.