| 再利用 | Reuse |
| 再生水 | Reused Water |
| 逆滲透 | Reverse Osmosis (RO) |
| 河川污染指數 | River Pollution Index (RPI) |
| 汙水 | Sanitary Sewage |
| 衛生下水道、污水下水道 | Sanitary Sewer |
| 二級產業用水 | Secondary Aquaculture Water Supply |
| 二級工業用水 | Secondary Industrial Water Supply |
| 二級公共給水 | Secondary Public Water Supply |
| 二級廢水處理 | Secondary Wastewater Treatment |
| 分流式下水道 | Separate Sewer |
| 污水、污物 | Sewage |
| 污水下水道系統 | Sewerage System |
| 鈉吸著率 | Sodium Adsorption Ratio(SAR) |
| 三級公共給水 | Tertiary Public Water Supply |
| 三級處理 | Tertiary Treatment |
| 3R | Three Rs |
| 總懸浮固體 | Total Suspended Solids (TSS) |
| 已處理水 | Treated Wastewater |
| 三鹵甲烷 | Trihalomethanes (Thms) |