The water will change substantially, sometimes a few times a year. The water reports will show an average for a period, not what you’re going to get out of your tap every day. Last I checked, mine was between 40-60mg/l alkalinity with about 40-80mg/l hardness….inconsistency like this is one reason, along with a desire to avoid contaminants, people would use RO or some similar treatment and remineralise to a spec. Bottled water is probably no better in terms of consistency either. I’d test on a regular basis if using tap water. Using a drop kit to test a sample will give you the most accurate results.
