求翻译：由省级政府所属的30个水资源委员会征收，税率根据排放物质的耗氧量和重金属的含量来确定，对不同的水资源保护区实行不同的税率。是什么意思？

30 Water Commission-owned by the provincial government levying the tax rate to determine the oxygen consumption of the emissions of substances and heavy metals, and to apply different tax rates for different water conservation district.

By the provincial government of the 30 Water Resources Commission, the tax rate based on emissions of heavy metals and oxygen consumption to determine the content of the different water resources protection area of different tax rates.

By the provincial level government respective 30 water resources committee collection, the tax rate determined according to the emissions material oxygen consumption capacity and the heavy metal content that, implements the different tax rate to the different water resources protectorate.

From 30 of provincial government-owned water resources Commission levied tax rate according to the amount of ozone-depleting substance emissions and to determine the content of heavy metals, impose different tax rates on different water resources protection zones.

正在翻译，请等待...