Of course. It is a matter of ...
Published by Joseph Cotruvo, President at Joseph Cotruvo & Associates, Water , Environment and Public Health
Of course. It is a matter of the definition of HIGH in each case. High hardness is considered to be over about 120 mg/L as calcium carbonate. High TDS is considered to occur at least at above 500 mg/L but it can go to well over 1000 mg/L.