Efforts of the Ministry of Environment to Address Groundwater Pollution by Nitrate Nitrogen

Among all substances, nitrate nitrogen exceeds groundwater environment standards the most. The average excess rate of 87,000 samples collected across the nation so far is 4.5%. Efforts implemented by the Ministry of Environment to address such groundwater pollution caused by nitrate nitrogen are described. The Ministry of Environment has established guidelines for comprehensive regional measures to improve nitrate groundwater pollution. The guidelines include methods for investigating nitrate groundwater pollution, measures for reducing nitrogen loads, and methods for simulating groundwater numerical analyses to confirm the effects.