Showering with water with high level of Nitrate, based on drinking water quality values is dangerous like swimming in lakes, rivers, seas, mineral water spa's, etc. Based on my experience and investigations some levels are determined based on real health studies and some are based on precautions. There is something in human psychology when they open a tap, they are scared what kind of water is coming out, but in fact, some water companies bring more effort to distribute healthy water then some bottled water companies and distributors, which is now a different discussion :)

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Showering with water with high level of Nitrate, based on drinking water quality values is dangerous like swimming in lakes, rivers, seas, mineral water spa's, etc. Based on my experience and investigations some levels are determined based on real health studies and some are based on precautions. There is something in human psychology when they open a tap, they are scared what kind of water is coming out, but in fact, some water companies bring more effort to distribute healthy water then some bottled water companies and distributors, which is now a different discussion :)