Table 1

Mean ELF-EMF exposure levels at schools in Oviedo and Barcelona (Spain)

	Number	Mean	Median	SD	Min	Max
Oviedo
Total	43	0.0170	0.0150	0.0093	0.004	0.043
Classrooms	42	0.0176	0.0140	0.0106	0.001	0.048
Canteen	38	0.0175	0.0160	0.0101	0.005	0.056
Entrance way	42	0.0177	0.0130	0.0147	0.002	0.075
Playground	42	0.0156	0.0120	0.0114	0.002	0.052

Barcelona
Total	50	0.0576	0.0160	0.1253	0.001	0.618
Classrooms	50	0.0557	0.0100	0.1432	0.001	0.878
Canteen	40	0.0442	0.0140	0.1118	0.001	0.671
Entrance way	50	0.1228	0.0410	0.2669	0.002	1.320
Playground	50	0.0338	0.0070	0.0891	0.000	0.462