My city (Garden Grove, CA)  water report   states that,  "Nitrates in
drinking water at levels above 45 mg/l is a health risk for infants of less
than six months of age .  The levels fluctuate during rainfall  and
agricultural activity...If you are caring for  an infant,  you should ask
advice from your  health care provider, or choose to use bottled water for
mixing fromula or juice for your baby.  If your pregnant, you should drink
bottle water."

It then goes on to give some interesting definitions and comparisons:

parts per million or  mg/L  equals  3 drops in 42 gallons.
parts per billion or  u g/L   equals   1 drop in 14,000 gallons.

I thought this would be helpful when discussing the amount of medication per
litre of milk in terms  more easily understood.  It really emphasizes how
very little medicine can be in mother's milk especially if it is measured in
terms of  micrograms.    Also consider that .the normal infant takes in about
 750-1200 ml of milk per day not a gallon.  Christine Betzold NP CLE

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