Table 2: Recommended amounts of fluoride in drinking water depending on climate.
| Average annual temperature (℃) | Fluorides concentration (ppm) | ||
|---|---|---|---|
| Minimal | Optimal | Maximal | |
| 10-12 | 0.9 | 1.2 | 1.7 |
| 12-14.5 | 0.8 | 1.1 | 1.5 |
| 14.6-17.5 | 0.8 | 1.0 | 1.3 |
| 17.6-21.4 | 0.7 | 0.9 | 1.2 |
| 21.5-26.2 | 0.7 | 0.8 | 1.1 |
| 26.3-32.5 | 0.6 | 0.7 | 0.8 |
Source: Voinovic J., Tatic E., Andelic P., Pintaric J. Preventive program in dentistry. Scientific book, Beograd, 1990 [26].