Quote Originally Posted by DuncanONeil View Post
At the water's edge and not inland? Here one is on the great lake and another is placed on anther body of water. Water is naturally higher in O3 regardless of pollution. Beside O3 itself is not the pollutant, so why artificially inflate the numbers with out trying for a real average?
I can't find any information regarding the natural concentration of ozone in water. In fact, unless the water is pure, the ozone would quickly react with any contaminants, destroying the ozone.

And ozone (O3) IS a pollutant at low levels. It can cause headaches, burning in the eyes, and respiratory irritation. People with resperatory problems already are particularly affected. So monitoring those levels is very important. And I would expect the monitoring to occur in those areas which are most likely to have high concentrations.