Although the second Research Committee of the Mining Pollution, as described above, concluded that the construction by the first measure decreased the mining pollution, there was no researching result to show they had stopped the pollution.
しかし、第二次鉱毒調査委員会は、前述のとおり、予防令による工事で鉱毒は減少したとは結論づけたが、鉱毒が消滅したという調査結果はない。