Since a chief source of pollutants is automobile emissions, it might be expected that pollutant levels could be correlated with automobile traffic, at least to some extent.

因为污染物的主要来源是汽车的排出物，所以可以料想污染物的浓度至少在某种程度上是与汽车运输有关。

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Of the 13 priority pollutant metals tested for, two are found in elevated levels in passivation waste effluent waters.

在经检测的13种优先级污染金属中，发现有两种金属在钝化废液中的水平有所增加。

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Removed the effect to TP to miss but had also achieved "Cities Sewage Treatment Plant Pollutant Discharged standard" (GB 18918-2002) the center two levels to discharge the standard.

对TP的脱除效果较差但也达到了《城镇污水处理厂污染物排放标准》(GB 18918 - 2002)中的二级排放标准。

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The gauges are used to monitor water and pollutant levels.

WSJ: Susquehanna River commission wants gauge funding

The researchers Katherine Ensor and Loren Raun cross referenced the time and place of the cases against air pollutant levels recorded by the extensive network of air monitors throughout the Houston area.

FORBES: Researchers Prove Air Pollution Causes Heart Attacks

Two Surrey councils have said they will be working together to improve air quality as readings showed levels of a pollutant above government targets.

BBC: Air pollutants in Woking above government target levels