Caption:  The Chart Table gwlabda1.dbf was derived from gwlabdat.dbf and shows maximum and average Total Dissolved Solids (TDS) and location. Data on total dissolved solids displayed above was collected by the North Coast Regional Water Quality Control Board staff and reflects samples from 1988 to 1992. To see an index of sample locations by river mile (rm), you may tab to the bottom of this text field. Shasta River total dissolved solids increase substantially in a downstream direction with highest levels often found below the Montague-Grenada Road (river mile 10.54). TDS can stem from many sources. Elevated levels in the lower Shasta Valley may result from mineralized spring flow and nutrient and mineral enrichment resulting from agricultural runoff. Locations by river mile of sampling stations are Highway 263 = rm 7.25, Anderson Grade Rd. = rm 8, Yreka-Ager Rd. = 10.54, Highway 3 = rm 12.79, Montague/Grenada Rd = 15.17, A-12 = rm 20.99, East Louie Rd. = 31.86, Riverside Dr. = 37.73.

 50 rows of a possible 117 have been displayed.

RMILE	MAXTDS	AVGTDS
7.25	320	320
8	450	364.4286
10.54	450	413.3333
12.79	400	337.75
15.17	400	327
20.99	360	294.1429
31.86	400	315
38.25	250	190