Table 1.

Mean fluoride concentrations (mg/L) in drinking water of rural areas of Shout region according to places and seasons.

Village	Source	Warm season		Cold season		Warm season				Cold season
		Average		Average		Fluoride concentration				Fluoride concentration
		T(°C)	pH	T(°C)	pH	Mean	Min	Max	Sd. ev	Mean	Min	Max	Sd. ev
Azimkandi	Spring	23	7.8	19	7.6	1.39	1.36	1.42	0.03	2	1.8	2.4	0.27
Maranglou	Spring	23	8.9	19	8.9	0.44	0.42	0.46	0.02	1.97	1.94	2	0.03
Injaghadim	Spring	23	8.8	17	8.2	0.01	0	0.03	0.02	1.18	1.15	1.24	0.04
Kolos	Well	24	7.9	19	7.9	1.43	1.36	1.52	0.07	3.1	2.75	3.4	0.30
Shorboulagh	Well	23	7.9	18	7.9	1.52	1.39	1.62	0.10	4	3.9	4.1	0.08
Karimkandi	Well	23	7.8	19	7.8	0.38	0.32	0.45	0.05	0.01	0	0.04	0.02
Fatah	Well	23	8	19	7.8	1.01	0.68	1.41	0.35	1	0.8	1.3	0.21
Molaahmad	Well	23	7.6	19	7.6	3	2.7	3.2	0.24	0.09	0.06	0.11	0.02
Pivasha	Well	23	7.8	19	7.8	0.37	0.3	0.44	0.07	1.25	1.22	1.31	0.04
Gara eyagh	Well	23	7.9	19	7.9	0.45	0.34	0.54	0.09	1.86	1.83	1.91	0.04
Khook	Well	22	7.8	19	7.5	1.38	1.37	1.4	0.01	0.79	0.68	0.89	0.10
Kesharkhi	Well	23	7.8	19	7.8	1.50	1.48	1.52	0.02	1.8	1.78	1.81	0.01
Garazamin	Well	23	7.9	17	7.8	0.20	0.1	0.28	0.08	1.8	1.42	2.3	0.37
Moukhor	Well	23	7.8	19	7.8	0.1	0.06	0.14	0.04	1	0.75	1.25	0.26
Yolagaldi	Well	23	7.8	18	7.8	1.2	1	1.4	0.18	3.5	3.3	3.7	0.18
Margan	Well	23	8.2	19	8.2	1.3	1.08	1.52	0.24	3	2.7	3.2	0.24
Tazakand	Well	23	7.8	19	7.5	0.2	0.12	0.26	0.06	0.2	0.14	0.25	0.05
Geday	Well	23	7.8	19	7.8	1	0.7	1.4	0.32	1.11	1.04	1.18	0.06
Khilajajam	Well	22	7.9	18	7.4	2.5	1.6	3.1	0.73	1	0.79	1.15	0.15
Khezrlou	Well	23	7.9	19	7.8	0.2	0.1	0.26	0.07	1.2	1.06	1.45	0.18
Toura	Well	23	7.8	19	7.9	0.3	0.16	0.36	0.09	1.8	1.62	2.1	0.21
Gabanbasan	Well	23	7.8	19	7.8	1	0.6	1.3	0.32	0.9	0.84	0.98	0.07
1053IR Standard						0.7				1.2
WHO Standard						0.8				1.2