The Harper government must report in a national public database all the pollution being produced by mining companies, a Federal Court judge has ruled. The National Pollutant Release Inventory (NPRI), created in 1993, details all the industrial and commercial pollutants released into the air, water and land in Canada. Since 2006, NPRI has also required that all pollutants released during mining activities must be reported. Some of the waste found in tailings and waste rock — including mercury, sulphuric acid and arsenic — is deemed toxic by law and must be reported in the NPRI.