Article 1
These Standards are determined pursuant to Article 11, Paragraph 2 of the Drinking Water Management Act (herein referred to as "this Act").
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Article 2
These standards shall apply to drinking water supplied from drinking water equipment designated in Article 4 of this Act and other drinking water designated by the central competent authority.
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Article 3
Regulations of these standards are set forth herein.
I. Bacterial standards: (Samples for total bacterial count must be collected from the finished water distribution networks that receive water from water treatment utilities with disinfection regime)
┌───────────┬────────┬─────────┐
│Item │Maximum limit │Unit │
├───────────┼────────┼─────────┤
│1. Coliform group │6 (Multiple-tube│Most probable │
│ │fermentation │number (MPN)/100 │
│ │method) │milliliters │
│ ├────────┼─────────┤
│ │6 (Membrane │Colony-forming │
│ │filtration │unit (CFU)/100 │
│ │method) │milliliters │
├───────────┼────────┼─────────┤
│2. Total bacterial │100 │Colony-forming │
│ count │ │unit │
│ │ │(CFU)/milliliter │
└───────────┴────────┴─────────┘
II. Physical standards:
┌───────────┬────────┬─────────┐
│Item │Maximum limit │Unit │
├───────────┼────────┼─────────┤
│1. Odor │3 │Threshold odor │
│ │ │number (TON) │
├───────────┼────────┼─────────┤
│2. Turbidity │2 │NTU (nephelometric│
│ │ │turbidity unit) │
├───────────┼────────┼─────────┤
│3. Color │5 │Platinum-cobalt │
│ │ │unit │
└───────────┴────────┴─────────┘
III. Chemical standards:
A. Substances that impact health:
┌───────────────────┬───────┬────────┐
│Item │Maximum limit │Unit │
├───────────────────┼───────┼────────┤
│1. Arsenic │0.01 │milligrams/liter│
├───────────────────┼───────┼────────┤
│2. Lead │0.01 │milligrams/liter│
├───────────────────┼───────┼────────┤
│3. Selenium │0.01 │milligrams/liter│
├───────────────────┼───────┼────────┤
│4. Total chromium │0.05 │milligrams/liter│
├───────────────────┼───────┼────────┤
│5. Cadmium │0.005 │milligrams/liter│
├───────────────────┼───────┼────────┤
│6. Barium │2.0 │milligrams/liter│
├───────────────────┼───────┼────────┤
│7. Antimony │0.01 │milligrams/liter│
├───────────────────┼───────┼────────┤
│8. Nickel │0.1 │milligrams/liter│
├───────────────────┼───────┼────────┤
│9. Mercury │0.002 │milligrams/liter│
├───────────────────┼───────┼────────┤
│10. Cyanide (as CN-) │0.05 │milligrams/liter│
├───────────────────┼───────┼────────┤
│11. Nitrite-nitrogen (as N) │0.1 │milligrams/liter│
├──────┬────────────┼───────┼────────┤
│Disinfection│12. Total │0.08 │milligrams/liter│
│byproducts │ trihalomethanes │ │ │
│ ├────────────┼───────┼────────┤
│ │13. Haloacetic acids │0.080 │milligrams/liter│
│ │ (This concentration │This standard │ │
│ │ is defined as the │is effective │ │
│ │ sum of measured │starting on │ │
│ │ concentrations for │July 1, 2014. │ │
│ │ five haloacetic │ │ │
│ │ acids, including │0.060 │ │
│ │ monochloroacetic │This standard │ │
│ │ acid (MCAA), │is effective │ │
│ │ dichloroacetic acid │starting on │ │
│ │ (DCAA), │July 1, 2015. │ │
│ │ trichloroacetic acid│ │ │
│ │ (TCAA), │ │ │
│ │ monobromoacetic acid│ │ │
│ │ (MBAA), and │ │ │
│ │ dibromoacetic acid.)│ │ │
│ ├────────────┼───────┼────────┤
│ │14. Bromate │0.01 │milligrams/liter│
│ │ │In │ │
│ │ │consideration │ │
│ │ │of water needs│ │
│ │ │and Taiwan’s │ │
│ │ │unique climate│ │
│ │ │and │ │
│ │ │hydrological │ │
│ │ │environment, │ │
│ │ │the bromate │ │
│ │ │standard will │ │
│ │ │not be │ │
│ │ │applicable │ │
│ │ │when the water│ │
│ │ │source │ │
│ │ │turbidity │ │
│ │ │exceeds 500 │ │
│ │ │NTU in the │ │
│ │ │event of │ │
│ │ │typhoons and │ │
│ │ │other natural │ │
│ │ │disasters. │ │
│ ├────────────┼───────┼────────┤
│ │15. Chlorites │1.0 │milligrams/liter│
│ │(Chlorite) │ │ │
│ │(This regulation only │ │ │
│ │applies to water supply │ │ │
│ │systems that use gaseous│ │ │
│ │chlorine dioxide as │ │ │
│ │disinfectant) │ │ │
├──────┼────────────┼───────┼────────┤
│Volatile │16. Trichloroethene │0.005 │milligrams/liter│
│organic ├────────────┼───────┼────────┤
│compounds │17. Carbon tetrachloride│0.005 │milligrams/liter│
│ ├────────────┼───────┼────────┤
│ │18. │0.20 │milligrams/liter│
│ │1,1,1-Trichloroethane │ │ │
│ ├────────────┼───────┼────────┤
│ │19. 1,2-Dichloroethane │0.005 │milligrams/liter│
│ ├────────────┼───────┼────────┤
│ │20. Vinyl chloride │0.002 │milligrams/liter│
│ ├────────────┼───────┼────────┤
│ │21. Benzene │0.005 │milligrams/liter│
│ ├────────────┼───────┼────────┤
│ │22. 1,4-Dichlorobenzene │0.075 │milligrams/liter│
│ ├────────────┼───────┼────────┤
│ │23. 1.1-Dichloroethylene│0.007 │milligrams/liter│
│ ├────────────┼───────┼────────┤
│ │24. Dichloromethane │0.02 │milligrams/liter│
│ │ │This standard │ │
│ │ │is effective │ │
│ │ │starting on │ │
│ │ │July 1, 2014. │ │
│ ├────────────┼───────┼────────┤
│ │25. 1,2-Dichlorobenzene │0.6 │milligrams/liter│
│ │ │This standard │ │
│ │ │is effective │ │
│ │ │starting on │ │
│ │ │July 1, 2014. │ │
│ ├────────────┼───────┼────────┤
│ │26. Toluene │1 │milligrams/liter│
│ │ │This standard │ │
│ │ │is effective │ │
│ │ │starting on │ │
│ │ │July 1, 2014. │ │
│ ├────────────┼───────┼────────┤
│ │27. Xylenes │10 │milligrams/liter│
│ │(This regulation │This standard │ │
│ │concentration is defined│is effective │ │
│ │as the sum of the │starting on │ │
│ │measured concentrations │July 1, 2014. │ │
│ │of three xylene isomers,│ │ │
│ │including 1,2-Xylene, │ │ │
│ │1,3-Xylene, and │ │ │
│ │1,4-Xylene.) │ │ │
│ ├────────────┼───────┼────────┤
│ │28. │0.07 │milligrams/liter│
│ │Cis-1,2-Dichloroethene │This standard │ │
│ │ │is effective │ │
│ │ │starting on │ │
│ │ │July 1, 2014. │ │
│ ├────────────┼───────┼────────┤
│ │29. │0.1 │milligrams/liter│
│ │Trans-1,2-Dichloroethene│This standard │ │
│ │ │is effective │ │
│ │ │starting on │ │
│ │ │July 1, 2014. │ │
│ ├────────────┼───────┼────────┤
│ │30. Tetrachloroethene │0.005 │milligrams/liter│
│ │ │This standard │ │
│ │ │is effective │ │
│ │ │starting on │ │
│ │ │July 1, 2014. │ │
├──────┼────────────┼───────┼────────┤
│Agricultural│31. Endosulfan │0.003 │milligrams/liter│
│chemicals ├────────────┼───────┼────────┤
│ │32. Lindane │0.0002 │milligrams/liter│
│ ├────────────┼───────┼────────┤
│ │33. Butachlor │0.02 │milligrams/liter│
│ ├────────────┼───────┼────────┤
│ │34. │0.07 │milligrams/liter│
│ │Dichlorophenoxyacetic │ │ │
│ │acid │ │ │
│ ├────────────┼───────┼────────┤
│ │35. Paraquat │0.01 │milligrams/liter│
│ ├────────────┼───────┼────────┤
│ │36. Methomyl │0.01 │milligrams/liter│
│ ├────────────┼───────┼────────┤
│ │37. Carbofuran │0.02 │milligrams/liter│
│ ├────────────┼───────┼────────┤
│ │38. Isoprocarb │0.02 │milligrams/liter│
│ ├────────────┼───────┼────────┤
│ │39. Methamidophos │0.02 │ │
│ ├────────────┼───────┼────────┤
│ │40. Diazinon │0.005 │ │
│ ├────────────┼───────┼────────┤
│ │41. Parathion │0.02 │ │
│ ├────────────┼───────┼────────┤
│ │42. O-Ethyl-O-P- │0.005 │ │
│ │Nitrophenyl │ │ │
│ │thionobenzenephos- │ │ │
│ │phonate │ │ │
│ ├────────────┼───────┼────────┤
│ │43. Monocrotophos │0.003 │milligrams/liter│
├──────┼────────────┼───────┼────────┤
│Persistent │44 Dioxin │3 │Petagram-World │
│organic │(Dioxin) │This standard │Health │
│pollutants │This regulation │is effective │Organization- │
│ │concentration is defined│starting on │total toxicity │
│ │as the │July 1, 2014. │equivalency │
│ │sum of the measured │ │quantity/liter │
│ │concentrations of │ │(pg-WHO-TEQ/L) │
│ │17 compounds, │ │ │
│ │including 2,3,7,8 │ │ │
│ │Tetrachlorinated │ │ │
│ │dibenzo-p-dioxin- │ │ │
│ │,3,7,8-TeCDD, 2,3 │ │ │
│ │7,8-Tetrachlorinated │ │ │
│ │dibenzofuran,2,3, │ │ │
│ │,8-TeCDF and 2,3, │ │ │
│ │,8-penta-, hexa- │ │ │
│ │hepta-, and octa- │ │ │
│ │chlorinated dioxins and │ │ │
│ │furan, multiplied by the│ │ │
│ │World Health │ │ │
│ │Organization’s │ │ │
│ │dioxin toxic equivalency│ │ │
│ │factor │ │ │
│ │(WHO-TEFs), and │ │ │
│ │is expressed as a │ │ │
│ │total toxicity │ │ │
│ │equivalency │ │ │
│ │quantity (TEQ). │ │ │
│ │(Any water purification │ │ │
│ │plants within a │ │ │
│ │5-kilometer │ │ │
│ │distance of a large │ │ │
│ │pollution source must be│ │ │
│ │tested once │ │ │
│ │annually. If the test │ │ │
│ │values do not exceed the│ │ │
│ │maximum permissible │ │ │
│ │limit │ │ │
│ │for two consecutive │ │ │
│ │years the testing │ │ │
│ │frequency may be │ │ │
│ │changed to once │ │ │
│ │every two years │ │ │
│ │starting in the │ │ │
│ │following year.) │ │ │
└──────┴────────────┴───────┴────────┘
B. Substances with potential health impact:
┌────────────────┬────┬────────┐
│Item │Maximum │Unit │
│ │limit │ │
├────────────────┼────┼────────┤
│1. Flouride (as F-) │0.8 │milligrams/liter│
├────────────────┼────┼────────┤
│2. Nitrate nitrogen │10.0 │milligrams/liter│
├────────────────┼────┼────────┤
│3. Silver │0.05 │milligrams/liter│
├────────────────┼────┼────────┤
│4. Molybdenum │0.07 │milligrams/liter│
│(This regulation only applies to│ │ │
│water supply systems with a │ │ │
│potential pollution source, such│ │ │
│as those with semiconductor │ │ │
│fabrication plants, │ │ │
│optoelectronic manufacturing │ │ │
│plants, or parts manufacturing │ │ │
│plants, located within a │ │ │
│5-kilometer distance upstream │ │ │
│from their water intake. The │ │ │
│testing frequency is once per │ │ │
│quarter. If the test values do │ │ │
│not exceed the maximum │ │ │
│permissible limits for two │ │ │
│consecutive years, the testing │ │ │
│frequency could reduce to once │ │ │
│per year from the following │ │ │
│year.) │ │ │
├────────────────┼────┼────────┤
│5. Indium │0.07 │milligrams/liter│
│(This regulation only applies to│ │ │
│water supply systems with a │ │ │
│potential pollution source, such│ │ │
│as those with semiconductor │ │ │
│fabrication plants, │ │ │
│optoelectronic manufacturing │ │ │
│plants, or parts manufacturing │ │ │
│plants, located within a │ │ │
│5-kilometer distance upstream │ │ │
│from their water intake The │ │ │
│testing frequency is once per │ │ │
│quarter. If the test values do │ │ │
│not exceed the maximum │ │ │
│permissible limits for two │ │ │
│consecutive years, the testing │ │ │
│frequency could reduce to once │ │ │
│per year from the following │ │ │
│year.) │ │ │
│ │ │ │
└────────────────┴────┴────────┘
C. Contaminants that cause aesthetic, cosmetic, and technical effects:
┌─────────────┬───────┬────────┐
│Item │Maximum limit │Unit │
│ │ │ │
├─────────────┼───────┼────────┤
│1. Iron │0.3 │milligrams/liter│
├─────────────┼───────┼────────┤
│2. Manganese │0.05 │milligrams/liter│
├─────────────┼───────┼────────┤
│3. Copper │1.0 │milligrams/liter│
├─────────────┼───────┼────────┤
│4. Zinc │5.0 │milligrams/liter│
├─────────────┼───────┼────────┤
│5. Sulfate (as SO4-2) │250 │milligrams/liter│
├─────────────┼───────┼────────┤
│6. Phenols │0.001 │milligrams/liter│
├─────────────┼───────┼────────┤
│7. Anionic surface-active │0.5 │milligrams/liter│
│ agents │ │ │
├─────────────┼───────┼────────┤
│8. Chloride (as Cl) │250 │milligrams/liter│
├─────────────┼───────┼────────┤
│9. Ammonia nitrogen │0.1 │milligrams/liter│
├─────────────┼───────┼────────┤
│10. Total hardness as │300 │milligrams/liter│
│ CaCO3 │ │ │
├─────────────┼───────┼────────┤
│11. Total dissolved solids│500 │milligrams/liter│
├─────────────┼───────┼────────┤
│12. Aluminum │0.4 │milligrams/liter│
│(This regulation │This standard │ │
│concentration is defined │is effective │ │
│as the concentration of │starting on │ │
│total aluminum.) │July 1, 2014. │ │
│ │ │ │
│ │0.3 │ │
│ │This standard │ │
│ │is effective │ │
│ │starting on │ │
│ │July 1, 2015. │ │
│ │ │ │
│ │0.2 │ │
│ │This standard │ │
│ │is effective │ │
│ │starting on │ │
│ │July 1, 2019. │ │
│ │(This │ │
│ │regulation is │ │
│ │not applicable│ │
│ │when the │ │
│ │turbidity of │ │
│ │the water │ │
│ │source is over│ │
│ │500 NTU in the│ │
│ │period of │ │
│ │typhoon │ │
│ │landfall │ │
│ │warning, and │ │
│ │when the │ │
│ │turbidity of │ │
│ │water source │ │
│ │is over 1000 │ │
│ │NTU during the│ │
│ │three days │ │
│ │after the │ │
│ │warning is │ │
│ │lifted.) │ │
│ │ │ │
└─────────────┴───────┴────────┘
D. Limits on residual chlorine (Limited to water supply systems using chlorine as disinfectant)
┌────────────────┬────┬────────┐
│Item │Maximum │Unit │
│ │limit │ │
├────────────────┼────┼────────┤
│Free available residual chlorine│0.2-1.0 │milligrams/liter│
└────────────────┴────┴────────┘
E. Range for pH index (water treated by stationary continuous water supply equipment on public or private premises are not be subjected to this limitation):
┌────────────────┬────┬────────┐
│Item │Maximum │Unit │
│ │limit │ │
├────────────────┼────┼────────┤
│Hydrogen ion concentration index│6.0-8.5 │No unit │
│(pH value) │ │ │
└────────────────┴────┴────────┘
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Article 4
When torrential rains or other natural disasters cause high turbidity in source water for tap water, small water treatment facilities or community-installed public water supplies to exceed 200NTU, the following water quality standards may apply to turbidity requirement for water quality standards.
┌─────┬─────────────────────┬──┐
│Item │Maximum limit │Unit│
├─────┼─────────────────────┼──┤
│Turbidity │4 (when source water turbidity is under │NTU │
│ │500 NTU) │ │
│ ├─────────────────────┤ │
│ │10 (when source water turbidity exceeds │ │
│ │500NTU but is under 1500 NTU) │ │
│ ├─────────────────────┤ │
│ │30 (when source water turbidity exceeds │ │
│ │1500 NTU) │ │
└─────┴─────────────────────┴──┘
Drinking water source turbidity testing data in the foregoing paragraph shall be provided by tap water enterprises, small water treatment units or community-installed public water supply units. Turbidity sampling sites for treated drinking water in the first paragraph shall be at a point after treatment by water purification plants or water purification facilities and prior to where drinking water enters water distribution pipelines.
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Article 5
When torrential rains or other natural disasters cause high turbidity in source water for tap water, small water treatment facilities or community-installed public water supplies to exceed 500NTU, the following water quality standards may apply to free available residual requirement for water quality standards (shall apply only to water supply systems that add chlorine disinfectants).
┌────────────────┬───────┬─────┐
│Item │Limit range │Unit │
├────────────────┼───────┼─────┤
│Free available residual chlorine│0.2-2.0 │milligrams│
└────────────────┴───────┴─────┘
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Article 6
(Deleted)
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Article 7
Testing methods for each water quality item designated in these Standards shall be designated and officially announced by the central competent authority.
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Article 8
A competent authority that conducts water quality analysis in accordance with these Standards may commission an approved analysis laboratory to assist with analysis.
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Article 9
Unless an implementation date is separately designated, the regulation items in these standards shall take effect on the date of promulgation.
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