放流水標準

The Standards are established pursuant to Article 7, Paragraph 2 of the Water Pollution Control Act (hereinafter referred to as the “Act”).

1The water quality items and limits for the effluent standards of the enterprises, sewage systems and building sewage treatment facilities are specified below:

2I. Enterprises

3(I) Wafer and semiconductor manufacturing industry: Table 1.

4(II) Optoelectronic materials and components manufacturing industry: Table 2.

5(III) Petrochemical industry: Table 3.

6(IV) Chemical engineering industry: Table 4.

7(V) Primary metal industry, metal finishing industry, electroplating industry, and PCB manufacturing industry: Table 5.

8(VI) Power plant: Table 6.

9(VII) Seawater desalination plant : Table 7.

10(VIII) Industries other than those referred to in the preceding 7 subparagraphs: Table 8.

1Requirements of Table 9 shall apply in case the permitted and approved sewer-connected water volume for the petrochemical and chemical engineering industries with respect to a sewage system in an industrial park reaches more than fifty percent of the permitted and approved discharge volume. Requirements of Table 10 shall apply in case such permitted and approved sewer-connected water volume for the petrochemical and chemical engineering industries does not reach fifty percent of the permitted and approved discharge volume.

2The wastewater (sewage) discharged from seawater desalination plants is subject to the following effluent standards:

3I. When seawater is treated as raw water and brine, filtering and backwashing wastewater, membrane cleaning wastewater or other mixed treatment wastewater with regard to desalination is discharged, Table 7 shall apply.

4II. When the produced wastewater (sewage) is discharged through marine discharge pipes to the ocean, the Marine Discharge Pipe Effluent Standards shall apply.

Enterprises and the associations to which the enterprises belong or any environmental protection groups may put forward scientific data or information at any time as a reference for review and amendment.

The COD limits specified in the Standards shall be tested using the potassium dichromate oxidation method; the true color shall be tested using the true color colorimetry.

1Terms used in the Standards shall be defined below:

2I. Total toxic organics: means the total concentration of 30 compounds: 1,2-Dichlorobenzene, 1,3-Dichlorobenzene, 1,4-Dichlorobenzene, 1,2,4-Trichlorobenzene, Toluene, Benzen, Chloroform, 1,2-Dichloroethane, Dichloromethane, 1,1,1-Trichloroethane, 1,1,2-Trichloroethane, Bromodichloromethane, Perchloroethylene, Trichloroethylene, 1,1-Dichloroethene, 2-Chlorophenol, 2,4-Dichlorophenol, 4-Nitrophenol, Pentachlorophenol, 2-Nitrophenol, Phenol, 2,4,6-Trichlorophenol, Bis(2-ethylhexyl)phthalate, Dibutyl phthalate, Benzyl butyl phthalate, Anthanthrene, 1,2-Diphenylhydrazine, Isophorone, Carbon tetrachloride and Naphthalene.

3II. Processes of high nitrogen connection in the petrochemical industry: means the following processes that uses nitrogen and produces wastewater with a volume reaching more than forty percent of the permitted and approved discharge volume:

4(I) Nitrogen trifluoride and electronic-grade liquid ammonia manufacture process.

5(II) Chemical manufacture process of methyl methacrylate (MMA).

6(III) Acrylonitrile manufacture process.

7(IV) Chemical manufacture process of acrylonitrile-butadiene (AB).

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1The limits of all the items, except for the hydrogen ion concentration index defined as a range, are defined as a maximum allowed value with the following measuring units:

2I. Hydrogen ion concentration index: No unit.

3II. True color: No unit.

4III. Coliform group: CFU/100mL.

5IV. Dioxin: pg I-TEQ/L.

6V. Other items: mg/L.

The limits of all the items, except for water temperature and hydrogen ion concentration index, of the non-contact cooling water that enterprises or sewage systems take from a water body and use it for cooling or circulation purpose are not subject to the Standards if it is discharged into the surface water body in the original water intake area.

1In the event that enterprises, sewage systems, or building sewage treatment facilities belong to two or more industry types within the scope of the Standards or to a single industry type but have different processes, the combined treatment and discharge of wastewater shall conform to the effluent standards for each of the concerned industry types. If different control limits are available for the same control item, the stricter limit shall apply. In the event that the flow of wastewater from one of the industry types in the preceding paragraph is at least 75% of the total flow of wastewater, and that independent and exclusive cumulative water measuring facilities have been installed, an application may be submitted to the competent authority for the use of the effluent standards of concerned industry type as the basis of control for all common items.

2The percentage of the flow of wastewater in the preceding paragraph shall be calculated in accordance with the records of the six months prior to the date of application.

The Standards come into force on the promulgation date unless any other enforcement date is specified.