서브메뉴로 바로가기 본문으로 바로가기

영문홈페이지 로고

  • Home
  • Korean
Bityeoulsu quality

clean & Tasty Tap Waters Bityeoulsu

Water Quality Test Standard

statutory criteria

Water Quality Management (Water Research Institute)

Proper management of water quality is essential to provide
clean and safe drinking water to the public through treatment of raw
intake water from the water source.

Most of our water source is from the lake and
there is little chance of abrupt water quality changes.
However, it is difficult to control the water quality as the
direct management is limited to Water Protection Zone. To solve this problem,
we are putting all our effort to maintain water quality in close coordination with other municipalities.

Criteria for microbes (4 items)

Criteria for microbes (4 items)
Item Water quality standard Item Water quality standard
Total colonies Below 100CFU/mL Total Coliform ND/100mL
E. coli ND/100mL Fecal Coliforms ND/100mL

Criteria for inorganics (11 items)

Criteria for inorganics (11 items)
Item Water quality standard Item Water quality standard
Lead Below 0.05㎎/L Chromium 6 Below 0.05㎎/L
Fluoride Below 1.5㎎/L Ammonia nitrogen Below 0.5㎎/L
Arsenic Below 0.05㎎/L Nitrate Below 10㎎/L
Selenium Below 0.01㎎/L Cadmium Below 0.005㎎/L
Mercury Below 0.001㎎/L Boron Below 1.0㎎/L
Cyanide Below 0.01㎎/L    

Criteria for organics and disinfection byproducts (27 items)

Criteria for organics and disinfection byproducts (27 items)
Item Water quality standard Item Water quality standard
Phenol Below 0.005㎎/L Dibromochloromethan Below 0.1㎎/L
Total trihalomethane Below 0.1㎎/L Benzene Below 0.01㎎/L
Diazinon Below 0.02㎎/L Toluen Below .7㎎/L
Parathion Below 0.06㎎/L Ethylbenzene Below 0.3㎎/L
Phenitrothion Below 0.04㎎/L Xylene Below 0.5㎎/L
Cabaryl Below 0.07㎎/L Chloroform Below 0.08㎎/L
1,1,1 - trichloroethane Below 0.1㎎/L 1,2-dibromo-3-chloropropane Below 0.003㎎/L
Tetrachloroethylene Below 0.01㎎/L Chloralhydrate Below 0.03㎎/L
Trichloroethylene Below 0.03㎎/L Dibromoacetonitrile Below 0.1㎎/L
Tetrachlorocarbon Below 0.002㎎/L Dichloroacetonitrile Below 0.09㎎/L
Residual chlorine Below 4.0㎎/L Trichloroacetonitrile Below 0.004㎎/L
1,1 - dichloroethylene Below 0.03㎎/L Haloaceticacid Below 0.1㎎/L
Bromodichloromethan Below 0.03㎎/L 1,4 - dioxane Below 0.05㎎/L
Dichloromethan Below 0.02㎎/L    

Criteria for aesthetic effect

Criteria for aesthetic effect
Item Water quality standard Item Water quality standard
Hardness Below 300㎎/L Zink Below 3.0㎎/L
Potassium Permanganate Consumption Below 10㎎/L Chloride ion Below 250㎎/L
Odor No odor Evaporation residue Below 500㎎/L
Taste No taste Iron Below 0.3㎎/L
Copper Copper Manganese Below 0.3㎎/L
Color Below 5 Aluminum Below 0.2㎎/L
Detergent Detergent Turbidity Below 0.5NTU
Hydrogen Ion Concentration 5.8~8.5 Sulfate Below 200㎎/L

Drinking Water Monitoring Items set by the Ministry of Environment

(Unit: mg/L)

Drinking Water Monitoring Items set by the Ministry of Environment
Item Drinking Water Monitoring Item Domestic Test Frequency
Once per month Once per quarter Once per year
Total 22 Total 2 Items 9 Items 11 Items
Volatile material Vinyl Chloride 0.002     ○
Styrene 0.02     ○
Chloroethane No Criteria   ○  
Phenols Chlorophenol 0.2     ○
2,4-Dichlorophenol 0.15     ○
Pentachlorophenol 0.009     ○
2,4,6-Trichlorophenol 0.015     ○
Chlorine
Disinfection
Byproducts		 Ethylendibromide 0.0004-     ○
Bromochloroacetonitrile No Criteria   ○  
Pesticides And
Haloacetic Acid		 2,4-D 0.03     ○
Alachlor 0.02     ○
Dibromoacetic acid 0.06(Total HAA)   ○  
Monobromoacetic acid 0.06(Total HAA)   ○  
Monochloroacetic acid 0.06(Total HAA)   ○  
Phthalates And
Adipate 		Di-2(ethylhexyl)phthalate 0.08   ○  
Di-2(ethylhexyl)adipate 0.4   ○  
Polycyclic Aromatic
Polycyclic Aromatic		 Benzo(a)pyrene 0.0007     ○
Inorganic Material Antimony 0.02     ○
Perchlorate 0.015   ○  
Others Formaldehyde 0.5   ○  
Geosmin 0.00002 ○    
2-MIB 0.00002 ○