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Pollution load
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Watershed
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Basin
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Subbasin
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Total pollution load of
1001 Subbasin in
Han River Watershed
(Unit : kg/day)
| Year | Production | Discharge |
| BOD | TN | TP | BOD | TN | TP |
| 2019 | 21,809.0 | 10,881.8 | 1,439.8 | 6,496.3 | 7,801.6 | 537.0 |
| 2013 | 163,406.6 | 55,676.2 | 11,342.9 | 22,272.0 | 11,341.4 | 5,280.8 |
| 2006 | 35,166.2 | 14,143.7 | 1,812.2 | 10,542.8 | 6,183.7 | 614.1 |
| 2005 | 30,309.9 | 14,700.5 | 1,977.3 | 6,926.2 | 6,628.0 | 661.4 |
| 2004 | 26,259.5 | 13,508.7 | 1,756.0 | 6,665.2 | 5,895.1 | 603.5 |
| 2003 | 25,363.7 | 13,433.9 | 1,719.9 | 6,602.7 | 5,856.4 | 596.7 |
| 2002 | 23,118.5 | 11,847.9 | 1,397.3 | 6,272.0 | 4,618.7 | 482.3 |
| 2001 | 285.9 | 167.2 | 23.1 | 39.5 | 42.7 | 2.8 |
| 2000 | 16,570.0 | 9,149.5 | 1,065.4 | 3,811.9 | 2,399.3 | 202.0 |
| 1999 | 17,751.5 | 9,537.0 | 1,174.0 | 4,156.8 | 2,517.6 | 210.5 |
| 1998 | 19,064.7 | 9,863.3 | 1,264.9 | 5,581.4 | 2,924.4 | 245.8 |
| 1997 | 19,371.1 | 9,948.4 | 1,279.3 | 5,647.7 | 2,960.1 | 249.4 |