安徽省地方标准：美自然与安徽省生态环境科学研究院共同编制《南四湖流域水污染物综合排放标准》（山东、江苏、安徽、河南四省联合发布）（2023年）
Anhui Provincial Local Standard: Meituan and Anhui Academy of Ecological and Environmental Sciences jointly developed the "Comprehensive Emission Standards for Water Pollutants in the Nansi Lake Basin" (jointly released by Shandong, Jiangsu, Anhui, and Henan provinces) (2023)
