April 14, 2023, Shandong Province, the national key monitoring enterprise monitoring information release platform shows that Yantai ** Water Co. Ammonia nitrogen, total nitrogen 3/31, 4/1; COD 4/2; total phosphorus 3/31 is suspected of exceeding the emission standards. PECC reflected the situation to the local environmental protection bureau through 12369 and microblogging, see below:

April 18, 2023 received feedback from the local environmental protection bureau: for the enterprise exceeding the standard has been investigated and verified, the violation of the proposed file for investigation.