Iodine Concentration in Brazilian Drinking Water and Its Possible Contribution to Iodine Intake for Different Physiological Groups

Table 2

Percentage of iodine based on the classification of iodine concentration in the water samples collected from Primary Healthcare Units (PHU) in locations situated in the macro regions of Brazil.

Location/region	Iodine concentration in water
	Low		Adequate		High		Excess
	<10 μg·L^−1		10–150 μg·L^−1		>150 μg·L^−1		>300 μg·L^−1
	N	%	n	%	N	%	n	%
Brasília (midwest)	10	83.3	2	16.7	—	—	—	—
Rondonópolis (midwest)	14	93.3	1	6.7	—	—	—	—
São Luís (northeast)	11	91.7	1	8.3	—	—	—	—
Palmas (north)	10	100.0	—	—	—	—	—	—
Macaé (Southeast)	7	77.8	2	22.2	—	—	—	—
Viçosa (southeast)	12	85.7	2	14.3	—	—	—	—
Vitória (Southeast)	3	100.0	—	—	—	—	—	—
Pinhais (south)	2	20.0	8	80.0	—	—	—	—

[18]; [19].