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A 0.50-L sample of drinking water is found to contain 8.0 μg of toluene.?
Does this exceed the standard? Maximum contaminant level for toluene is 1.0 mg/L.
3 Answers
- busterwasmycatLv 72 years agoFavorite Answer
16 ppb is less than 1 ppm. that is, 16 ug per liter is much smaller than 1000 ug per liter (1 mg per liter).
The big jump is that there are 1000 g per liter, or 1 million mg, or 1 billion ug, so a mg/L = 1 ppm, and a ug/L=1 ppb.
Interestingly (I just checked the reg), there is no toluene limit for drinking water where I live. Benzene has a limit of 5 ug/L. Toluene is, however, a regulated contaminant in groundwater, so it is conceivable that (in this jurisdiction) the quality of the groundwater could be defined as unsuitable for potable use (including watering of livestock) yet not unfit per se if measured from the tap (naturally, only if toluene was the sole problem, which would be very unusual). I never realized that until now.
- 2 years ago
8 mcg per 0.5 L => 16 mcg per Liter
Is 16 micrograms/liter less than 1 milligram/liter? 1 mg = 1000 micrograms.
