If all the costs of investment in fixed assets such as reservoirs, pipes and purification plants were properly calculated and reflected in water charges, water in Taiwan would actually be more expensive than petrol: "It would cost at least three times what it does now, or about NT $ 20 per unit," says Yang Chung-hsin, a research fellow at the Academia Sinica's Institute of Economics.
如果確實精打細算，把水庫投資、輸送管線、淨水等固定投資成本實際反映，轉嫁到水費，台灣水其實比汽油還貴，「至少是現在的三倍，每度應有二十元」，中研院經濟研究所研究員楊重信說。