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Here is a summary of actual negative and positive ion measurements featured in literature and media.
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Please note:
- The unit is pcs/cc.
- "-" shows no data.
- 1,000 or more is shown in bold.
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1. Health science of negative ions / Noboru Yamanoi
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Measurement location
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Negative ion
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Positive ion
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Mountain
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700+
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-
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Shinjuku Kabukicho, Tokyo (Outside)
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-
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157
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Fountain (Shinjuku, Tokyo)
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780
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-
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Business district (Windy weather)
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380
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-
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Inside office
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-
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550+
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10m away from the basin of a waterfall
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4730
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-
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Forest
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1800
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-
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2. Secrets of negative ions / Akiko Sugahara
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Measurement location
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Negative ion
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Positive ion
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Forest
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2000
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1000
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Inside office
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0
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500
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Windy office (window opened)
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380
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-
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10m away from a waterfall (Sunny weather, Humidity 40-60%)
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2800
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-
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Busy street (Sunny weather, Humidity 40-60%)
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1800
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2700
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Industrial district (Sunny weather, Humidity 40-60%)
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500
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2000
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Room of an apartment (Sunny weather, Humidity 40-60%)
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1500
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2200
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Room made of wood (Sunny weather, Humidity 40-60%)
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2100
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1400
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Beside a window during a lightning storm
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3000+
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+
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Karaoke room
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5
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5
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Game arcade
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30
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40
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Riverside (Tokyo)
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270
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120
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Park (Windy weather)
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1000
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500
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3. Splendid tourmaline healthy life / Ryuzo Nagai
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Measurement location
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Negative ion
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Positive ion
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Forest
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1000
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-
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Around the basin of a waterfall
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1500
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-
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4. Travel in the sky / The negative ion research association
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Measurement location
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Negative ion
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Positive ion
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Nihonbashi, Tokyo (Outside)
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68
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175
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Office in Tokyo (Daytime average)
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34
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270
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30F office room in Tokyo
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28
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140
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10F room of an apartment in Tokyo
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96
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135
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Mountain in Nagano
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115
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140
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Room in an Ibaragi farming district (Daytime average)
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215
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230
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Tochigi Nasu plateau
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692
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670
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Offshore in the Pacific Ocean
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830
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495
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5. Negative ions save our planet / Noboru Horiguchi
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Measurement location
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Negative ion
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Positive ion
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10m away from a waterfall
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12000
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1800
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Riverside forest
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2800
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1700
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Busy roadway
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1800
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2700
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Industrial district
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500
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2000
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RC building
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1500
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2200
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Building which has mud walls and/or is made of wood
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2100
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1400
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6. Ion revolution in the body / Noboru Yamanoi
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Measurement location
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Negative ion
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Positive ion
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On a lawn
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109
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-
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Under a tree
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207
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-
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Room equipped with a TV, VCR, audio equipment and air conditioner
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-
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56
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Kitchen
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-
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130
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Blow off point of an ion air purifier
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80000
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-
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Room equipped with an air conditioner which electronically emits negative ions (center of the 26.4m2 room)
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2000-5000
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-
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Author: Masaharu Nemoto
(Universal Plan Co., Ltd.)
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| Related pages of: |
Actual negative and positive ion measurements featured in literature and media |
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