About 150,000 people in Kansas get their drinking water from private wells.

How clean, and safe, is that water? Short answer: It depends.

But new research suggests those wells deliver water tainted with a range of pollutants. Some leaked from dry cleaning operations. Yet far more wells soak up, and deliver to taps, fertilizer that’s been building up in Kansas soil and water over generations of modern farming.

But it’s not up to regulators from Washington or agencies in Topeka to test private well water quality. That falls to individual well owners. With little to no government oversight, some public health officials worry that’s creating a system where far too many people are left vulnerable to potential cancer-causing pollutants and toxins.

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