Monitoring items and methods
In 2002, the Department of Environmental Monitoring and Information Management, EPA Executive Yuan,took over all the national environmental water monitoring work. The sampling procedures all follow the rules announced by the Environmental Analysis Laboratory of the EPA. “River, Lake, Reservoir water quality sampling general rule” (NIEA W104.51C), “Sampling methods of groundwater’s monitoring well” (NIEA W103.54B), “The general rules of water quality testing method – preservation article” (NIEA W102.51C) are all standard basis for sampling. For a more detailed sampling analysis standard, one can refer to the “key point explanations of environmental water monitoring and sampling” which is available at the Department of Environmental Monitoring and the Information Management, EPA Yuan website. The principles of reviewing and adjusting each water monitoring procedure are that they must meet the requirements of regulatory standards and are beneficial to data analysis and the reviewing of pollution causes. Analysis operations adopt the standards of “The general rules of water monitoring methods” (NIEA W102.51C) announced by the Environmental Analysis Laboratory, EPA, and use related category detection methods to do each water quality measurement task. However, because the composition of environmental water bodies are complicated, it is difficult to define the scope of the concentration of water pollution. In order to satisfy the high requirements of monitoring the quality of data, the test methods of some particular items use more stringent restrictions. For example; the detection of Ammonia Nitrogen restricts Ammonia to select the “Electrode method” and the “Digestion method”, the detection of Nitrate Nitrogen restricts the use of the“Vauquline method”, Hexavalent chromium of heavy metal is restricted to the use MIBK extraction, Transparence is restricted to use a Secchi disk of a diameter of 30cm..etc. Regarding the current test methods of water monitoring procedures are listed in the following:
River
Monitoring itemTest method Method explanation
Water Temperature NIEA W217.51A Water temperature detection method
pH NIEA W424.52A Electrode Method
Electrical Conductivity NIEA W203.51B The method of conductivity meter
Suspended Solids NIEA W210.58A Drying at 103℃~105℃
Chloride NIEA W407.51C Silver Nitrate titration
Biochemical Oxygen Demand NIEA W510.55B Detection method of BOD5 in the water
Chemical Oxygen Demand NIEA W515.54A Potassium dichromate method
NIEA W516.55A Potassium dichromate method with halide ions of high concentration
Total Organic Carbon NIEA W532.52C Oxidization heating for Peroxy-Pyrosulfate / Infrared determination
Ammonia Nitrogen NIEA W448.51B Indophenol colorimetry
NIEA W437.52C Indophenol method
Nitrate Nitrogen NIEA W415.53B Ion chromatographic method
NIEA W436.52C Flow Injection analysis method of cadmium reduction
Nitrite Nitrogen NIEA W418.53C Spectrophotometer method
NIEA W436.52C Flow Injection analysis method of cadmium reduction
Dissolved Oxygen NIEA W455.52C Electrode Method
Total Phosphate NIEA W427.53B Spectrophotometer method / Vitamin C method
Coliform Group NIEA E202.55B Filter membrane method
Mn NIEA W311.53C Inductively coupled plasma atomic emission spectrometry
NIEA W313.53B Inductively coupled plasma mass spectrum method
NIEA W308.22B Chelation-solvent extraction separation with ion-exchange resin
Zn NIEA W311.53C Inductively coupled plasma atomic emission spectrometry
NIEA W313.53B Inductively coupled plasma mass spectrum method
NIEA W308.22B Chelation-solvent extraction separation with ion-exchange resin
Cu NIEA W311.53C Inductively coupled plasma atomic emission spectrometry
NIEA W313.53B Inductively coupled plasma mass spectrum method
NIEA W308.22B Chelation-solvent extraction separation with ion-exchange resin
Pb NIEA W311.53C Inductively coupled plasma atomic emission spectrometry
NIEA W313.53B Inductively coupled plasma mass spectrum method
NIEA W308.22B Chelation-solvent extraction separation with ion-exchange resin
As NIEA W435.53B Batched hydride- atomic absorption spectrometry
NIEA W434.54B Automatic continuous flow injection-hydride generation-atomic absorption spectrometry
Cd NIEA W311.53C Inductively coupled plasma atomic emission spectrometry
NIEA W313.53B Inductively coupled plasma mass spectrum method
NIEA W308.22B Chelation-solvent extraction separation with ion-exchange resin
Hg NIEA W330.52A Cold-vapor atomic absorption spectroscopy
Se NIEA W340.51A Selenium hydride-atomic absorption spectrometry
NIEA W341.51B Automatic continuous flow injection-hydride generation-atomic absorption spectrometry
Ag NIEA W313.53B Inductively coupled plasma mass spectrum method
NIEA W311.53C Inductively coupled plasma atomic emission spectrometry
Cr6+ NIEA W320.52A Colorimetry

Reservoir
Monitoring itemTest method Method explanation
Water Temperature NIEA W217.51A Water temperature detection method
transparence NIEA E220.51C Method for determination of water body transparence
pH NIEA W424.52A Electrode Method
Turbidity NIEA W219.52C Turbidimeter method
Electrical Conductivity NIEA W203.51B The method of conductivity meter
Suspended Solids NIEA W210.58A Drying at 103℃~105℃
Chemical Oxygen Demand NIEA W515.54A Potassium dichromate method
Total Organic Carbon NIEA W532.52C Oxidization heating for Peroxy-Pyrosulfate / Infrared determination method
Ammonia Nitrogen NIEA W437.52C Indophenol method
NIEA W448.51B Indophenol colorimetry
Nitrate Nitrogen NIEA W436.52C Flow Injection analysis method of cadmium reduction
NIEA W415.53B Ion chromatographic method
Nitrite Nitrogen, NIEA W418.53C Spectrophotometer method
NIEA W436.52C Flow Injection analysis method of cadmium reduction
Total Hardness NIEA W208.51A EDTA Titration
Total Alkalinity NIEA W449.00B Titration Method
Phosphate NIEA W427.53B Spectrophotometer method / Vitamin C method
Total Phosphate NIEA W427.53B Spectrophotometer method / Vitamin C method
Dissolved Oxygen NIEA W455.52C Electrode method
Chlorophyll-a NIEA E507.03B Acetone extraction method

Groundwater
Monitoring items

Test method

Method explanation
Water Temperature NIEA W217.51A Water temperature detection method
pH NIEA W424.52A Electrode Method
Electrical Conductivity NIEA W203.51B The method of conductivity meter
Total Dissolved Solid NIEA W210.58A Drying at 103℃~105℃
Total Organic Carbon NIEA W532.52C Oxidization heating for Peroxy-Pyrosulfate / Infrared determination
Ammonia Nitrogen NIEA W448.51B Indophenol colorimetry
NIEA W437.52C Indophenol method
Nitrate Nitrogen NIEA W415.53B Ion chromatographic method
NIEA W436.52C Flow Injection analysis method of cadmium reduction
Total Hardness NIEA W208.51A EDTA Titration
Total Alkalinity NIEA W449.00B Titration Method
Sulfate NIEA W430.51C Titration Method
NIEA W415.53B Ion chromatographic method
Chloride NIEA W407.51C Silver Nitrate titration
NIEA W415.53B Ion chromatographic method
Ca NIEA W311.53C Inductively coupled plasma atomic emission spectrometry
NIEA M104.02C Inductively coupled plasma atomic emission spectrometry
Mg NIEA W311.53C Inductively coupled plasma atomic emission spectrometry
NIEA M104.02C Inductively coupled plasma atomic emission spectrometry
Na NIEA W311.53C Inductively coupled plasma atomic emission spectrometry
NIEA M104.02C Inductively coupled plasma atomic emission spectrometry
K NIEA W311.53C Inductively coupled plasma atomic emission spectrometry
NIEA M104.02C Inductively coupled plasma atomic emission spectrometry
Fe NIEA W311.53C Inductively coupled plasma atomic emission spectrometry
NIEA W308.22B Chelation-solvent extraction separation with ion-exchange resin
Mn NIEA W311.53C Inductively coupled plasma atomic emission spectrometry
NIEA W308.22B Chelation-solvent extraction separation with ion-exchange resin
Zn NIEA W313.53B Inductively coupled plasma mass spectrum method
NIEA W311.53C Inductively coupled plasma atomic emission spectrometry
NIEA W308.22B Chelation-solvent extraction separation with ion-exchange resin
Cu NIEA W311.53C Inductively coupled plasma atomic emission spectrometry
NIEA W313.53B Inductively coupled plasma mass spectrum method
NIEA W308.22B Chelation-solvent extraction separation with ion-exchange resin
Cr NIEA W311.53C Inductively coupled plasma atomic emission spectrometry
NIEA W313.53B Inductively coupled plasma mass spectrum method
Pb NIEA W311.53C Inductively coupled plasma atomic emission spectrometry
NIEA W313.53B Inductively coupled plasma mass spectrum method
NIEA W308.22B Chelation-solvent extraction separation with ion-exchange resin
As NIEA W435.53B Batched hydride- atomic absorption spectrometry
NIEA W434.54B Automatic continuous flow injection-hydride generation-atomic absorption spectrometry
Cd NIEA W311.53C Inductively coupled plasma atomic emission spectrometry
NIEA W313.53B Inductively coupled plasma mass spectrum method
NIEA W308.22B Chelation-solvent extraction separation with ion-exchange resin
Hg NIEA W330.52A Cold-vapor atomic absorption spectroscopy
Ni NIEA W311.53C Inductively coupled plasma atomic emission spectrometry
NIEA W313.53B Inductively coupled plasma mass spectrum method
NIEA W308.22B Chelation-solvent extraction separation with ion-exchange resin
Benzene NIEA W785.55B Purge and trap / gas chromatography mass spectrometry method
Toluene NIEA W785.55B Purge and trap / gas chromatography mass spectrometry method
Ethylbenzene NIEA W785.55B Purge and trap / gas chromatography mass spectrometry method
Xylene NIEA W785.55B Purge and trap / gas chromatography mass spectrometry method
Naphthalene NIEA W785.55B Purge and trap / gas chromatography mass spectrometry method
Carbon tetrachloride NIEA W785.55B Purge and trap / gas chromatography mass spectrometry method
Chlorobenzene NIEA W785.55B Purge and trap / gas chromatography mass spectrometry method
Chloroform NIEA W785.55B Purge and trap / gas chromatography mass spectrometry method
Methylene chloride NIEA W785.55B Purge and trap / gas chromatography mass spectrometry method
1,4 - dichlorobenzene NIEA W785.55B Purge and trap / gas chromatography mass spectrometry method
1,1 - dichloroethane NIEA W785.55B Purge and trap / gas chromatography mass spectrometry method
1,2 - dichloroethane NIEA W785.55B Purge and trap / gas chromatography mass spectrometry method
1,1 - dichloroethylene NIEA W785.55B Purge and trap / gas chromatography mass spectrometry method
cis-1 ,2 - dichloroethylene NIEA W785.55B Purge and trap / gas chromatography mass spectrometry method
trans-1 ,2 - dichloroethylene NIEA W785.55B Purge and trap / gas chromatography mass spectrometry method
Tetrachlorethylene NIEA W785.55B Purge and trap / gas chromatography mass spectrometry method
Trichlorethylene NIEA W785.55B Purge and trap / gas chromatography mass spectrometry method
Perchlorethylene NIEA W785.55B Purge and trap / gas chromatography mass spectrometry method
Methylene chloride NIEA W785.55B Purge and trap / gas chromatography mass spectrometry method
1,1,2 -trichloroethane NIEA W785.55B Purge and trap / gas chromatography mass spectrometry method

Sea area
Monitoring itemTest method Method explanation
Water Temperature NIEA W217.51A Water temperature detection method
pH NIEA W424.52A Electrode Method
Suspended Solids NIEA W210.58A Drying at 103℃~105℃
Ammonia Nitrogen NIEA W448.51B Indophenol colorimetry
NIEA W437.52C Indophenol method
Nitrate Nitrogen NIEA W415.53B Ion chromatographic method
NIEA W436.52C Flow Injection analysis method of cadmium reduction
Nitrite Nitrogen, NIEA W436.52C Flow Injection analysis method of cadmium reduction
NIEA W418.53C Spectrophotometer method
Salinity NIEA W447.20C The method of conductivity meter
Dissolved Oxygen NIEA W455.52C Electrode method
Phosphate NIEA W427.53B Spectrophotometer method / Vitamin C method
Chlorophyll-a NIEA E507.03B Acetone extraction method
Zn NIEA W313.53B Inductively coupled plasma mass spectrum method
NIEA W308.22B Chelation-solvent extraction separation with ion-exchange resin
Cu NIEA W308.22B Chelation-solvent extraction separation with ion-exchange resin
NIEA W313.53B Inductively coupled plasma mass spectrum method
Cr NIEA W313.53B Inductively coupled plasma mass spectrum method
NIEA W311.53C Inductively coupled plasma atomic emission spectrometry
Pb NIEA W313.53B Inductively coupled plasma mass spectrum method
NIEA W311.53C Inductively coupled plasma atomic emission spectrometry
NIEA W308.22B Chelation-solvent extraction separation with ion-exchange resin
Cd NIEA W313.53B Inductively coupled plasma mass spectrum method
NIEA W311.53C Inductively coupled plasma atomic emission spectrometry
NIEA W308.22B Chelation-solvent extraction separation with ion-exchange resin
Hg NIEA W330.52A Cold-vapor atomic absorption spectroscopy

Beach
Monitoring itemTest method Method explanation
Water Temperature NIEA W217.51A Water temperature detection method
pH NIEA W424.52A Electrode Method
Salinity NIEA W447.20C The method of conductivity meter
Coliform Group NIEA E202.55B Filter membrane method
Enterococcus NIEA E235.51C Luciferase detection method
UPDATE:2019/09/27