Is spring water safe to during during pregnancy?

Spring water? The term is rather vague & might be applied to water coming from a variety of sites. Water by itself is fine, but it is the trace elements in the water that may be a problem. Was the water certified as being free of toxins ? If so it is not a problem. Without knowing what is in the water you describe it is hard to recommend it as safe.

What do you expect to get from mineral water that you could not get from tap water? Tap water is fine. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs.