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Implemented on January 1st, 2026! HJ 212-2025 officially released, enterprise pollutant automatic monitoring data transmission faces six major upgrades

Time：

2025-07-14

HJ 212-2025 "Technical Requirements for Data Transmission of Pollutant Automatic Monitoring and Control Systems" will be implemented from January 1, 2026. The biggest change compared to the 2017 version is the upgrade from "online monitoring" to an integrated system of "automatic monitoring+intelligent monitoring". For the first time, electricity data, key production conditions, access control status, VOCs spectra, noise recordings, video streams, etc. are included in the mandatory transmission scope, constructing a data loop covering the entire chain of "pollution discharge control supervision evidence collection".

To guide the data transmission between automatic monitoring devices and the data collection and processing of automatic monitoring devices, the Ministry of Ecology and Environment recently issued the national ecological environment standard "Technical Requirements for Data Transmission of Pollutant Automatic Monitoring and Control Systems (HJ 212-2025 replaces HJ 212-2017)". This standard will be implemented from January 1, 2026.

It is reported that the biggest change of HJ 212-2025 compared to the 2017 version is the upgrade from "online monitoring" to an integrated system of "automatic monitoring+intelligent monitoring", which realizes the deep integration of pollutant monitoring, electricity monitoring, working condition recognition, video monitoring, and data security. For the first time in the 2025 version, electricity consumption data, key production conditions, access control status, VOCs spectra, noise recordings, video streams, etc. will be included in the mandatory transmission scope, constructing a data loop covering the entire chain of "pollution discharge treatment supervision evidence collection".

Key content

It is understood that this standard specifies the system structure of the pollutant automatic monitoring and control system, the protocol hierarchy between the on-site computer and the upper computer, the communication protocol between the on-site computer and the upper computer, the communication method between the automatic monitoring on-site instruments and data acquisition instruments, and the technical requirements for data acquisition, processing, and uploading. This standard is applicable to the data transmission between automatic monitoring devices, as well as the data collection and processing of automatic monitoring devices.

This standard is a revision of the "Data Transmission Standard for Pollutant Online Monitoring (Monitoring) Systems" (HJ 212-2017). This is the second revision, and the main revisions are as follows:

——The standard name has been revised to "Technical Requirements for Data Transmission of Pollutant Automatic Monitoring and Control Systems";

——Added terms and definitions such as "electricity monitoring", "video monitoring", and "data tagging";

——Added requirements related to "communication security" and "bandwidth requirements for communication between on-site computers and upper level computers";

——Added coding rules for monitoring parameters of "electricity consumption" and "key production conditions";

——Improved the 'data tagging content';

——Added requirements for data collection, processing, and uploading;

——Appendix A has added examples of data segment encryption and key management processes;

——Appendix B has improved the on-site equipment classification and coding table, as well as the on-site information coding table; Added classification and coding tables for facility electricity monitoring, parameter coding tables for facility electricity monitoring, industry classification and coding tables for key production conditions, and parameter coding tables for key production conditions;

——Appendix D has removed the calculation methods for real-time and minute emissions of water pollutants, minute and hour values of water pollutant concentration (weighted average method), minute, hour, and daily average values of water pollutant concentration (arithmetic average method), and flue gas data processing calculation methods; Revised the calculation methods for hourly and daily emissions of water pollutants, as well as the calculation method for the daily average concentration of water pollutants (weighted average method);

——Added Appendix E communication protocol between data acquisition instrument and mobile terminal;

——Added Appendix F: Confirmation Form for Networking Information of Pollutant Emission Automatic Monitoring Equipment;

——Added Appendix G for determining the effectiveness of automatic monitoring data on pollutant emissions;

——Added Appendix H Multimedia File Transfer Technology Requirements.

From the date of implementation of this standard, the "Data Transmission Standard for Pollutant Online Monitoring (Monitoring) System" (HJ 212-2017) is abolished.