Water / Soil / Ground Environment
Environmental Quality Standards for Groundwater Pollution
Establishment of Environmental Quality Standards for Groundwater Pollution
Environmental Quality Standards (EQS) for groundwater pollution were issued in 1997 and they are required to be maintained in order to protect human health.
As a result of additions made in 1999, 2000, 2001, 2011, and 2012, EQS now regulate 28 hazardous substances and items including heavy metals, volatile organic carbons, and etc.
| Item | Standard Values |
|---|---|
| cadmium | 0.003mg/liter or less |
| total cyanogen | not detectable |
| lead | 0.01mg/liter or less |
| chromium (VI) | 0.05mg/liter or less |
| arsenic | 0.01mg/liter or less |
| total mercury | 0.0005mg/liter or less |
| alkyl mercury | not detectable |
| PCB | not detectable |
| dichloromethane | 0.02mg/liter or less |
| carbon tetrachloride | 0.002mg/liter or less |
| vinyl chloride monomer | 0.002mg/liter or less |
| 1,2-dichloroethane | 0.004mg/liter or less |
| 1,1-dichloroethylene | 0.1mg/liter or less |
| 1,2-dichloroethylene | 0.04 mg/liter or less |
| 1,1,1-trichloroethane | 1mg/liter or less |
| 1,1,2-trichloroethane | 0.006mg/liter or less |
| trichloroethylene | 0.01mg/liter or less |
| tetrachloroethylene | 0.01mg/liter or less |
| 1,3-dichloropropene | 0.002mg/liter or less |
| thiram | 0.006mg/liter or less |
| simazine | 0.003mg/liter or less |
| thiobencarb | 0.02mg/liter or less |
| benzene | 0.01mg/liter or less |
| selenium | 0.01mg/liter or less |
| nitrate nitrogen and nitrite nitrogen | 10 mg/liter or less |
| fluoride | 0.8 mg/liter or less |
| boron | 1 mg/liter or less |
| 1,4-dioxane | 0.05mg/liter or less |