Table 2.
Main Pollution Sources of Four Contaminated Rivers in Southern Taiwan. The Percent Contribution to the Overall Pollution is Indicated for Each Source.
| Source | Tongkong River1 | Kao-Ping River2 | Era-Jiin River3 | Lin Bien River4 |
|---|---|---|---|---|
| Animal Husbandry | Swine, chicken, duck, and fish farming—72% | Swine, chicken, duck, and fish farming—58% | Swine, duck, chicken, and fish farming—51% | Swine, duck, and chicken farming—70% Fish farm waste--22% |
| Industry | Industrial district (Food processing, fabric, metal industry, etc.)—11% | Leather industry heavy metal reclamation, food processing—31% | Heavy metal refinery, electrical processing, acid washing—38% | Few gravel factories—2% |
| Domestic | Sewage and garbage—12% | Sewage and garbage—8% | Sewage and garbage 10% | Sewage and garbage—6% |
| Seepage, Non-point source | 5% | 3.3% | <1% | <1% |