Naturally occurring negative ions

The positive and negative ions found in our surroundings can vary in number depending on a variety of factor, including temperature, humidity, and air circulation. A car with its windows closed contains around 15 negative ions/cm³. Turn the air conditioner on, and that number can drop to 1 negative ion/cm3. An average room contains approximately 150 negative ions/cm3. A well-insulated office building has about 50 negative ions/cm3, which is the same amount of a polluted city. Outdoor air in cities with low pollution contains around 300-400 negative ions/cm3.
 
Standing near a creek or river and you could be exposed to approximately 600 negative ions/cm3. Large fountains can produce upwards of 1,000 negative ions/cm3, while forests contain more than 3,000 negative ions/cm3. Close to the shore of a beach contains about 4,000 negative ions/cm3, depending on wave strength and wind. Small waterfalls can produce between 5,000 and 10,000 negative ions/cm3, while large waterfalls can produce between 10,000 and 50,000 negative ions /cm3. Niagara Falls and similarly sized waterfalls can produce 100,00 negative ions/cm3.
 
As you can see, amounts of negative ions can vary widely based on many factors. It is also important to understand that positive and negative ions exist together in most environments. As you will find, particular environments can greatly influence your well-being both physically and mentally, in both good ways and bad. The key is to limiting your exposure to high levels of positive ions and spend more time in areas rich in negative ions, as doing so may have significant effect on your health. You may use the chart below as quick guide to the average concentrations of negative ions found in various environments.
 

AVERAGE CONCENTRATION OF NEGATIVE IONS BY ENVIRONMENT
Environment	Negative ions/cm3
Air-conditioned indoors	0-100
Road with heavy traffic	100-300
Well-ventilated home	500
Riverside	600
Countryside	1,000
Large fountain	1,000
Forest	3,000
Beach	4,000
Small waterfall	5,000-10,000
Large waterfall	10,000-50,000
Niagara Falls	1000,000

 
While you may not be able to visit Niagara Falls on a regular basis, the information provided by this chart certainly suggests taking a walk in nature more often. These outdoor environments can be refreshing not only thanks to their beauty but also because of the elevated concentrations of negative ions provide.
 
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