A subscription service where a well owner uploads their lab results and receives a clear, professionally reviewed interpretation, flagging anything that needs real action versus anything within normal range, closes a real understanding gap between raw lab data and a homeowner's ability to act on it. Revenue is a per-report fee or an annual subscription for owners who test regularly.
I'd want the interpretation process itself grounded in a licensed water quality professional's review rather than an automated lookup table, since well contamination issues carry real health consequences and a homeowner needs to trust the interpretation enough to actually act on a serious flag rather than dismiss it.