1. Does this study refer ONLY to 'sand filtered' storm water?
2. Does ALL Storm Water contain even 'miniscule, trace amounts' of Heavy Metals?
3. We have used 'Grey Water' from Laundry, kitchen, shower, for 'irrigation purposes, both landscape and Edible plants;
have we 'shortened our lives'?
WATER, in extremely Arid Zones, is dear indeed; 'using' water to as great extent as possible, is primary in our thoughts!
The City of Tucson allows placement of 'viaducts' through sidewalks, for purpose of 'capturing' some of the Run-off from storms; where, if not 'captured' by means such as this (Keeping rainwater where it fell), downstream flooding is inevitable.
Keeping the storm water on the land, at least mitigates some of the flood water.
Flood water, is sent downstream, for someone else to deal with, and the runoff/flood water (with ALL contaminates) is thus eventually, 'sacrificed' into the sea. See Also 'Algal Blooms' and 'Dead Zones'.
Roy Stewart,
Phoenix AZ