Parameters and frequency of waterworks’ water source inspection
(Regulation No. 25 of Office of Waterworks Administration Regulations [asterisk 6])
| Type | Measurement frequency | Parameters measured | Time of measurement | |
|---|---|---|---|---|
| Metropolitan and regional waterworks | River water, infiltration water | At least monthly (6 parameters) |
pH, BOD, SS, DO, coliform group (total, branch) | |
| At least quarterly (25 parameters) |
Cd, As, CN, Hg, Pb, Cr6+, anion surfactant, organic phosphorus, PCB, flourine, selenium, ammoniacal nitrogen, nitric nitrogen, carbaryl, 1,1,1-trichloroethane, trichloroethylane, phenol, carbon tetrachloride, 1,2-dichloroethane, dichloromethane, benzene, chloroform, DEHP, antimony | Mar, Jun, Sept, Dec | ||
| Lake water | At least monthly (6 parameters) |
pH, COD, SS, DO, coliform group (total, branch) | ||
| At least quarterly (25 parameters) |
Cd, As, CN, Hg, Pb, Cr6+, anion surfactant, organic phosphorus, PCB, flourine, selenium, ammoniacal nitrogen, nitric nitrogen, carbaryl, 1,1,1-trichloroethane, trichloroethylane, phenol, carbon tetrachloride, 1,2-dichloroethane, dichloromethane, benzene, chloroform, DEHP, antimony | Mar, Jun, Sept, Dec | ||
| Subsurface water | At least once half-yearly (19 parameters) |
Cd, As, CN, Hg, Pb, Cr6+, anion surfactant, diazinon, parathion, fenitrothion, flourine, selenium, ammoniacal nitrogen, nitric nitrogen, carbaryl, 1,1,1-trichloroethane, tetrachloroethane, trichloroethylane, phenol | ||
| Village, private and small-scale waterworks | Surface water (river, infiltration, stream, etc.) | At least once half-yearly (6 parameters) |
pH, BOD, SS, DO, coliform group (total, branch) | |
| At least biannually (9 parameters) |
Cd, As, CN, Hg, Pb, Cr6+, anion surfactant, organic phosphorus, PCB | |||
| Lake water | At least once half-yearly (6 parameters) |
pH, COD, SS, DO, coliform group (total, branch) | ||
| At least biannually (9 parameters) |
Cd, As, CN, Hg, Pb, Cr6+, anion surfactant, organic phosphorus, PCB | |||
| Subsurface water | At least biannually (11 parameters) |
Cd, As, CN, Hg, Pb, Cr6+, anion surfactant, diazinon, parathion, fenitrothion, flourine | ||
Inspection parameters and frequency for drinking water
(Regulation No. 4 of Regulations on water quality standards and inspection for drinking water)
| Type | Parameters measured | |
|---|---|---|
| Purification Plant | Daily inspection (6 parameters) |
Smell, taste, chromaticity, pH, turbidity, residual chlorine |
| Weekly inspection (7 parameters) |
General bacteria, coliform group (total, branch), coliform bacillus, ammoniacal nitrogen, nitric nitrogen, consumed potassium permanganate, evaporated residual matter | |
| Monthly inspection (60 parameters) |
All water quality indicators of drinking water (total trihalomethane in disinfection by-products, chloroform, bromodichloromethane, dibromochloromethane, etc.) | |
| Quarterly inspection (7 parameters) |
7 parameters out of 11 disinfection by-products (residual chlorine, chloral hydrate, dibromoacetonitrile, dichloroacetonitrile, trichloroacetonitrile, haloacetic acid, Formaldehyde) | |
| Faucet | Monthly inspection (4 parameters) |
General bacteria, coliform group (total, branch), coliform bacillus, residual chlorine |
| Water pipes, faucets in areas with old facilities | Monthly inspection (10 parameters) |
General bacteria, coliform group (total, branch), coliform bacillus, ammoniacal nitrogen, iron, bronze, zinc, manganese, chlorine ions, residual chlorine |
| Water supply process per facility | Monthly inspection (11 parameters) |
General bacteria, coliform group (total, branch), coliform bacillus, ammoniacal nitrogen, total trihalomethane, bronze, zinc, iron, turbidity, residual chlorine, pH |
| Village, private, and small-scale waterworks | Quarterly inspection (13 parameters) |
General bacteria, coliform group (total, branch), coliform bacillus, ammoniacal nitrogen, nitric nitrogen, smell, taste, chromaticity, turbidity, flourine, manganese, aluminum, residual chlorine |
| Yearly inspection (60 parameters) |
All water quality indicators of drinking water | |
| Drinking water, communal facilities | Quarterly inspection (6 parameters) |
General bacteria, coliform group (total, branch), coliform bacillus, ammoniacal nitrogen, nitric nitrogen, consumed potassium permanganate |
| Yearly inspection (48 parameters) |
All water quality indicators of drinking water (excluding disinfectants and disinfectant by-products) | |