I use RODI all the time but I decided to try 50 gallons of Brackettville water from my parents well. Drilled in 1929 they use it to fill up a stock tank, it had been running for 24 hours before I pumped my 50 gallons in 10 buckets. I tested 6 gallons of freshly made salt water with RODI and 6 gallons of Well water with an API test kit. RODI no Nitrates, well water 10ppm +. Remember it came staright out of the 300' well with no storage tank and the plumbing is PVC. I know the water levels are low in the county due to over pumping from surrounding counties, so normally it is harder. But I never thought of this great tasting well water having nitrates?
Anybody have any ideas or readings from your wells or tap?