Water Pollution Control Measures and Test Reporting Management Regulations Article 65

An enterprise or sewage system shall install and properly maintain cumulative water measurement facilities, maintain their normal functions and calibrate based on the frequency indicated in the brand specifications. However, if the frequency of calibration indicated in the brand specifications is more than one year, the measurement facilities shall be calibrated at least every year.Regarding the specifications of the cumulative water measurement facilities in the previous paragraph, the margin of error within the range of measurable flow shall not exceed +/-5%. However, non-contact cooling water not used for circulation whose flow is calculated by motor rotation is not subject to this restriction.When an enterprise or sewage system performs calibration and maintenance of cumulative water measurement facilities, the date of calibration and maintenance, water quantity during the calibration and maintenance, and the results of calibration and maintenance shall be recorded and kept for five years. The recording of the water quantity during the calibration and maintenance shall be performed in the way approved by the competent authority.Should any of the following occurs during the audit on an enterprise or sewage system, the competent authority may estimate the quantity of wastewater or sewage discharge based on actual measurements, certification of water resources or water quantity equilibrium diagram:1. The cumulative water measurement facilities are abnormal;2. The wastewater or sewage discharge is far different from the quantity shown on the permit; or3. The cumulative water measurement facilities are not calibrated or maintained as required in Paragraph 1.