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美国环境保护署为保护对硝酸盐较为敏感的3个月以下的婴儿而在饮用水质量标准中规定了硝酸盐含量必须低于10ppm、虽然可认为10ppm的硝酸盐含量表明水受到了污染,但我们通常都认为水中硝酸盐含量高于3ppm时,水中硝酸盐含量超过了天然含量,是水质受到人类活动影响的证据.人们很容易理解硝酸盐是如何进入地表水的,但却不太明确硝酸盐是如何进入地下水的.尽管地下水的硝酸盐污染日益受到人们的关注,但对此也应有个正确的看法.本文将简述有关地下水中硝酸盐的一些事实.
The US Environmental Protection Agency states that the nitrate content must be less than 10 ppm in drinking-water quality standards for the protection of nitrate-sensitive infants up to 3 months. Although 10 ppm of nitrate may be considered indicative of water contamination, It is generally accepted that the nitrate content in water exceeds the natural level when the nitrate content in the water is above 3 ppm, evidence of water quality being influenced by human activity.It is easy to understand how nitrates enter the surface water, but it is less clear How salt enters the groundwater While there is growing concern about the nitrate pollution of groundwater, there should also be a fair view of this. This article will outline some of the facts about nitrate in groundwater.