Finally, it is plausible that the occurrence of the fluoride ‘hot spot’ in Lamphun may be caused by a similar human-influenced hydrogeological factor that influenced the extent of the high-fluoride anomalous zone at the Chiang Mai site
Finally, it is plausible that the occurrence of the fluoride ‘hot spot’ inLamphun may be caused by a similar human-influencedhydrogeological factor that influenced the extent of the high-fluorideanomalous zone at the Chiang Mai site