Possible Effects of Perchlorate Contamination of Drinking Water on Thyroid Health

Table 2

Distribution of perchlorate concentration in groundwater samples from the study areas.

Area	Location (source)	Perchlorate (ppb)
Contaminated area	1. Keezhmad (open well)	9000
	2. Keezhmad (open well)	13000
	3. Kulakkad (open well)	53000
	4. Nalamile (open well)	1600
	5. Edathala (open well)	17000
	6. Keezhmad (borewell)	2000
	7. Edathala (borewell)	7800
	8. Societypady (open well)	4700
	9. APEP (open well)	57000
	10. Meekarankunnu (open well)	1800
Control area	11. CHC, Pallissery (open well)	20
	12. Pallissery (open well)	BDL
	13. Elavoor kavala (open well)	14
	14. Karukutty (open well)	BDL
	15. SCMS (borewell)	5