cns = central nervous system
ihtr = in-house test results
ISBH = Indiana State Board of Health
gpg = grains per gallon (an older English unit of concentration equal to about 17.1 mg/l)
lod = limit of detection (the lowest level a particular test can detect)
mcl = maximum contaminate level, usually set by a governing authority
mgd = million gallons per day
mg/l = milligrams per liter (practically equivalent to ppm where water is the solvent)
nd = not detected
µg/l = micrograms per liter (practically equivalent to ppb where water is the solvent)
pCi = picoCuries, a measure of radioactivity.
ppb = parts per billion
ppm = parts per million
ppt = parts per trillion
Edited 02/07/2004