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Announced Organization: Environmental Protection Bureau

The Environmental Protection Bureau of the Executive Council announced to tighten and increase water discharge standards of partial controlled projects starting from 2021 on December 25, 2017, to improve the quality of water bodies and reducing the risk of agricultural land pollution by revising the controlled items and limits of ammonia nitrogen, heavy metals, carcinogenic substances, and true color. Nantou County’s Environmental Protection Bureau will collect the released water from 34 newly-controlled businesses or sewage systems to detect the water quality concentration of ammonia nitrogen, total nitrogen, free and effective residual chlorine, tin, and molybdenum. It is expected to be completed before the end of July this year, and the industry is required to pre-assess whether the existing wastewater facilities are adequate, and if necessary, improvements should be taken to avoid punishment for exceeding the standards.

To further reduce the total discharge of ammonia nitrogen in water bodies, the EPB has added ammonia nitrogen control items for the sewage system of five businesses: metal surface treatment, electroplating, and tanning industries that are made into finished skins, waste landfills, power plants, and other industrial areas. As for the public sewage system, the regulations on ammonia nitrogen and total nitrogen control have been updated. In addition, total nitrogen and total phosphorus control items have been set for tourist hotels in the water quality and quantity protection zone of waste (polluted) water discharged into the water source water quality protection zone to further improve the water quality of the protection zone.

In addition, the discharge of high-chromaticity wastewater into the receiving water body often causes a change of color and affects public perception. Stricter true color and chromaticity limits have been imposed on 23 types of businesses such as the tanning industry and the sewer system of industrial areas, furthermore free and effective residual chlorine control items have been added to prevent the industry from harming water organisms due to the addition of excessive bleaching agents.

Due to the low compliance rate of heavy metals in river water quality and pollution of agricultural land, the control limits for nine heavy metals is tightened, including cadmium, lead, total chromium, hexavalent chromium, copper, zinc, nickel, selenium, and arsenic, as well as in tin control items. These have been applied to seven businesses with heavy metal production and a certain scale of water discharge: wafer and semiconductor manufacturing, optoelectronic materials and component manufacturing, chemical industry, metal basic industry, metal surface treatment industry, electroplating industry, printed circuit board manufacturing, etc., as well as special sewage systems for scientific industrial parks, petrochemical professional areas, and other industrial areas.

Nantou County’s EPB reminds all public institutions that the above-mentioned tightened or newly added drainage control projects will come into effect on January 1, 2021. If you are not sure about the new revised discharge standard, you can call the bureau’s consultation hotline 049-2233791, and a representative will provide consultation services. The EPB will also continue to review the functions of wastewater treatment facilities in the pipeline business to reduce the amount of water pollution and improve river water quality.