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Water Sanitation and Health (WSH)

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Naturally occurring hazards: Previous page | 1,2,3,4,5,6

Conclusions

  Table of contents

The key points about the natural hazards in water are as follows:

  • All trace elements are toxic in excess
  • Some natural waters contain undesirable levels of fluoride, arsenic and other contaminants. The health effects depend on diet and general state of health: a well balanced diet can reduce or remove many of the harmful effects.
  • Multiple exposure must be taken into account when assessing the effects of trace elements in water. This can be through food, air, industrial contamination and products such as toothpaste.
  • The main toxicity from drinking water is from long-term exposure and occasional consumption of water above the guideline value is generally of no public health importance.

Naturally occurring hazards: 1,2,3,4,5,6 | Next page

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