The water from Pokegama Spring at Detroit, Minn, is used widely through the Northwest as a table water. It is considered to be a very excellent drinking water because of the low amount of solids and the absence of any deleterious constituents. The complete chemical analysis as reported by the North Dakota Pure Food Laboratory is as follows:

Grains per gallon

Sodium chloride................................

0.0200

Sodium sulphate................................

0.0357

Sodium carbonate...............................

3.9288

Calcium carbonate....................................

11.3997

Lime carbonate..............................................

0.0016

Magnesium carbonate...........................

3.8896

Sodium phosphate..............................

trace

Potassium sulphate.............................

0.4435

Silica..........................................

0.4416

Organic matter................................................................

0.1006

Total........................................

20.2611

The total solids, 20.2611 grains per gallon, equivalent to 346.85 parts per million, is very low and composed of carbonates of sodium, calcium and magnesium, none of which are in any way harmful even in much larger quantities. The amount of organic matter is practically nothing.