[Tagging] Water source types

[Warin]

On 12-Jan-18 03:25 AM, Cez jod wrote:
> I noticed that tagging without drinking_water=no/yes can have one 
> weakness if the water is contaminated permanently with metal salts of 
> heavy metals and other chemical compounds poisonous. Maybe can solve 
> this problem using hazard=* e.g.?
> natural=spring / amenity=drinking_water
> drinking_water:legal=no (when it is a microbiological threat it is not 
> so bad)
> hazard=poison (when contaminated with heavy metal salts, water can not 
> be clean by boiling)

drinking_water=no means you cannot drink the water .. so that covers any 
contamination including metal salts of heavy metals and other chemical 
compounds poisonous.
How water may be purified is not covered in the present scheme. The 
problem raised before was that any tagging may be seen as providing a 
legal liability, ignoring the fact that drinking_water=yes may also 
provide a legal liability.

To me it is logical to add values to drinking_water=*, such as filter, 
boil, filter_boil .. but then there is also the degree of filtering..