water-quality standards

例句：

1. 1. The city has strict water-quality standards for its rivers and lakes.
   这个城市对河流和湖泊有严格的水质标准。
2. 2. The government is working on setting new water-quality standards for the country's drinking water.
   政府正在努力制定新的饮用水水质标准。
3. 3. The farmers are trying to meet the water-quality standards set by the government.
   农民们正试图达到政府设定的水质标准。