Ohio River at TMC,  Water Hardness, July 15, 2003
	Total	Ca Hardness	Mg Hardness
	Hardness
	ppm	ppm	ppm
Upstream	120.0	80.0	40.0
at TMC
Tributary	104.0	68.0	36.0
12 Mile Creek
Downstream	100.0	80.0	20.0
from 12 Mile Cr.