You know thats a good point... my well is 600ft and I do ICP tests every 4 weeks so you can give that a try.. Im here in California so the state pays for annual water testing of private wells so I take advantage of that and the report covers pesticides and other contaminants. Home depot offers free well water testing too i believeI'm also on well water, which I feel like can be a bit scarier. I am in a agricultural/rural part of my town and fear pesticides or other nasty **** getting into my well. Not even sure on how well water systems work tbh.