f3922471_ater_Standards_and_Definitions__AGENT
[ACCEPTABLE or SAFE LIMITS] Less than 5 NTU [SOURCES] Small particles of solid matter, possibly from soil runoff [EFFECTS] Water can appear opaque or cloudy Sand or lead shavings could be in your water May cause plumbing, hot water tanks, etc. to plug up [AGENT] 
Turbidity
Haskell Water Treatment Drinking Water Standards and Definitions
AGENT