OSHA requires that potable water must be provided in all places of employment.
This means having water that is both free of coliforms & has a nitrate reading below EPA exceedance standards.
A satisfactory water sample today does not guarantee the future quality of your drinking water. Lewis County PH&SS recommends that you test your well water at least once a year for bacteria, and every three years for nitrates. Test your water again after any construction and/or maintenance is performed on your water system.