Affiliations: *National Institute of Health, Department of Medical Science, Moinistry of Public Health, Nonthaburi
**Office of Atoms for Peace, Ministry of Science and Technology, Bangkok
***Boromarajonnani College of Nursing Chakriraj, Ban Pong District, Rachaburi Province
****Academy of Science, The Royal Institute, Bangkok
Source: Journal of Health Science 2004; 13: 32-6
In Rachaburi Province, there are two significant natural hot spring: Boe Klueng in Suan Pueng district and Baan Pu Namron in Baan Ka subdistrict. On November 30, 2003, a pollution survey conducted at both sites revealed the presence of dissolved radon gas in water samples as high as 170,794.99 and 23621.69 becquerels/cubic meter, respectively (safety threshold is 400,000 becquerels/cubic meter), while simultaneous measurements of gamma ray exposure and atmospheric radon gas in the vicinity of those sites showed gamma radiation intensity of 40 and 23.5 mR/h, respectively (normal background intensity does not exceed 20 mR/h) and radon gas ranges of 39.36-53.59 and 31.40-46.74 becquerels/cubic meter , respectively (safety level : 148 Bq.m3) ; and revealed the presence of Legionella pneumophila organisms in water samples from both hot spring source, i.e., serogr. 13 at Boe Klueng’s bathing pond ,and serogr 7 and seroogr 6 in water samples from the main hot spring and bathing tanks respectively at Baan Pu Namron. Worthy of note is that the same group of researchers had succeeded in detecting leionell organism in one of natural hot spring in Mae Hong Son province . The present authors intend to carry on further survey in order to identify the hazards in natural hot spring in the Kingdom.