Regulations for Reservoir Monitoring
Name of Act, Rules or Standards Article Article Content
Water Pollution Control Act Article 10

Competent authorities at all levels shall install water quality monitoring stations, perform sampling and testing work, issue official announcements of testing results at regular intervals and adopt appropriate measures.

An irrigation competent authority or a relevant agency may be commissioned to perform the water quality monitoring work in the foregoing paragraph.

Water Pollution Control Act Enforcement Rules Article 7

The water quality monitoring stations designated in Article 10, Paragraph 1 of this Act shall be installed and perform monitoring pursuant to the following regulations.

  • The central competent authority shall install monitoring stations depending on the water quality circumstances in surface water bodies and groundwater bodies involving two or more special municipalities, counties or cities.
  • Special municipality, county and city competent authorities shall install monitoring stations depending on the water quality circumstances in surface water bodies and groundwater bodies within their jurisdictions.

 

The sampling frequency of water quality monitoring stations in the foregoing paragraph shall, in principle, be once per quarter and these stations shall monitor the following items.

  • Water temperature
  • Hydrogen ion concentration index
  • Dissolved oxygen
  • Heavy metals
  • Other items designated by the central competent authority based on water body characteristics

 

Competent authorities at all levels shall issue official announcements for monitoring results and statistical data on a quarterly basis and special municipality, county and city competent authorities shall report data to the central competent authority to be filed for future reference.

Installation and Monitoring Standards of Water Quality Monitoring Stations Article 1 These Standards are established pursuant to Article 15, Paragraph 4 of the Enforcement Rules of the Water Pollution Control Act .
Article 3

Water quality monitoring stations for lakes or reservoirs shall, in principle, be installed in the following locations:

  • major inflow spots of pollution sources;
  • inflow spots of rivers and outflow spots of lakes;
  • major water use points;
  • spots reflecting general water quality; and
  • other essential spots.
Article 7

The sampling frequency and sections of lakes or reservoirs shall conform to the following provisions:

  • The sampling frequency shall, in principle, be once per quarter, and be adjusted considering seasonal changes of water bodies.
  • Areas, depths and stratifications of lakes or reservoirs shall be taken into consideration while sampling in order to obtain representative water samples.
Surface Water Classification and Water Quality Standards Article 3

The classification of terrestrial and marine surface water bodies are intended to specify the nature of application and relevant environmental standards for water bodies on the basis of their characteristics, but not to restrict the uses of water bodies .

Relevant environmental standards for water bodies concerning the protection of the living environment and human health are shown in Table 1 and Table 2 respectively .
Drinking Water Source Quality Standards Article 5 The water quality of surface water and groundwater bodies that are used as drinking water sources (both tap and non-tap water) shall conform to the requirements listed in Table 3.
Table 1 Environmental Standards for Protecting the Living Environment - Terrestrial Surface Water Bodies
Class Standard Values
pH DO
(mg/L)
BOD
(mg/L)
SS
(mg/L)
Coliform
(CFU/100mL)
NH3-N
(mg/L)
TP
(mg/L)
A 6.5-8.5 Over 6.5 Less than 1 Less than 25 Less than 50 Less than 0.1 Less than 0.02
B 6.5-9.0 Over 5.5 Less than 2 Less than 25 Less than 5,000 Less than 0.3 Less than 0.05
C 6.5-9.0 Over 4.5 Less than 4 Less than 40 Less than 10,000 Less than 0.3
D 6.0-9.0 Over 3 Less than 8 Less than 100
E 6.0-9.0 Over 2 Less than 10 No floating material and no oil
  • Notes: The following units are used for standard values in the foregoing standards:
    (1) Hydrogen ion concentration index: no unit.
    (2) Coliform: colonies forming on a membrane filter per 100 mL water sample.
    (3) Others: mg/L.
  • pH : Hydrogen Ion Concentration Index,
    DO : Dissolved Oxygen
    BOD : Biological Oxygen Demand
    SS : Suspended Solids
    NH3-N : Ammonia Nitrogen
    TP : Total phosphorus
  • According to the regulation of “terrestrial surface water bodies classification and water quality standards” terrestrial surface water bodies classification standard and environmental standards for protecting human health are adjusted , starting from 2017/09/13.
Table 2 Environmental Standards for Protecting Human Health
Water Quality Item Standard Value (Unit: mg/L)

Heavy metals

Cadmium 0.005
Lead 0.01
Hexavalent chromium 0.05
Arsenic 0.05
Total mercury 0.001
Selenium 0.01
Copper 0.03
Zinc 0.5
Manganese 0.05
Silver 0.05
Nickel 0.1

Inorganic salts

Cyanide 0.05

Volatile organic compounds

Carbon tetrachloride 0.005
1,2-dichloroethane 0.01
Dichloromethane 0.02
Toluene 0.7
1,1,1-trichloroethane 1
Trichlorethylene 0.01
Benzene 0.01

Agricultural chemicals

Total organophosphates (Parathion, Diazinon, Methamidophos, Monocrotophos, EPN, Chlorpyrifos) and carbamates (Fenobucarb, Carbofuran, Methomyl) 0.1
Endrin 0.0002
Lindane 0.004
Toxaphene 0.005
Endosulfan 0.003
Heptachlor and its derivatives (Heptachlor, Heptachlor epoxide) 0.001
DDT and its derivatives (DDT, DDD, DDE) 0.001
Aldrin, Dieldrin 0.003
Pentachlorophenol and its salts 0.005
Herbicides (Butachlor, Paraquat, 2,4-D) 0.1

Other substances

Phenol 0.005
  • Notes:
    (1) The above standards provide specific standard values for substances posing hazards to human health.
    (2) Standard values are shown in maximum allowable quantities.
    (3) These values are uniformly applicable to all public waters.
    (4) Maximum allowable quantities for other agricultural chemicals harmful to the water quality shall be added and officially announced by the central authority.
  • According to the regulation of “terrestrial surface water bodies classification and water quality standards” terrestrial surface water bodies classification standard and environmental standards for protecting human health are adjusted , starting from 2017/09/13.
Table 3 Drinking Water Source Quality Standards
Item Maximum Limit Unit
E. Coli 20,000(with disinfection unit)50(without disinfection unit)

MPN/100ml or CFU/100ml

Ammonia Nitrogen(NH3-N) 1 mg/L
Chemical Oxygen Demand(COD) 25 mg/L
Total organic carbon(TOC) 4 mg/L
Arsenic(As) 0.05 mg/L
Lead(Pb) 0.05 mg/L
Cadmium(Cd) 0.01 mg/L
Chromium(Cr) 0.05 mg/L
Mercury(Hg) 0.002 mg/L
Selenium(Se) 0.05 mg/L
UPDATE:2019/09/27