95% it is safe. If it wasn't, it'd be marked as such. The spring doesn't need much space. Rain drops, gets filtered by sand and soil, comes out from a spring do

95% it is safe. If it wasn't, it'd be marked as such. The spring doesn't need much space. Rain drops, gets filtered by sand and soil, comes out from a spring down bellow. A park of few hundred square meters is more than enough to be a safe filter. Source: drink frequently from springs in/around towns.