Do you have negative and positive ion count data measured at actual locations?

Here are some ion counts we actually measured. Please note that ion counts are just for your reference because they change every second.

Unit: (pcs/cc)

Location	Negative ion	Positive ion	Temp.	Humid.

Ion Trading office kitchen

220

180

28C

65%R.H.

Balcony of a 6th floor flat (Tachikawa-city Tokyo)

200

300

27C

45%R.H.

Entrance of a press shop (Tachikawa-city Tokyo)

150

500

26C

60%R.H.

Woods in a park (Hino-city Tokyo)

300

450

24C

78%R.H.

Pond in a park (Hino-city Tokyo)

650

600

26C

50%R.H.

River side (Hino-city Tokyo)

300

400

25C

61%R.H.

Car exhaust (Toyota Cresta)

1,200

3,000

23C

68%R.H.

Fountain (Fuchu-city Tokyo)

8,000

2,000

31C

45%R.H.

* Measured by a flat type ion counter ** Counted only small ions whose mobility is 0.8(cm2/Vs) or above. *** Measured Date: 15:30-18:00 15th Jun 2000 (Fountain: 16:00 11th Jul 2000)