英语翻译

问题描述:

英语翻译
For each ground water well or surface water intake that supplies public drinking water,the state must delineate or map the land area that could contribute water and pollutants to the water supply.这句话后半句怎么都译不通.
这个contribute water and pollutants to the water supply,是怎么翻译的呢?

这句话是指
the land area那地区
可能向供水系统中提供水量或带来污染