The Missouri Department of Natural Resources describes a Hydrogeologic Consultant business as:

A business that provides specialized consultant and groundwater services for mining, civil, agriculture, water supply and wastewater management under the direction of a hydrogeologists or geochemists.

You may need some or all of the following permits for a Hydrogeologic Consultant business:

Water Exportation Permit https://dnr.mo.gov/water/business-industry-other-entities/permits-certifications/exportation

Water

If you or your business want to withdraw water from any Missouri water resource for exportation outside of Missouri, you may be required to obtain a water exportation permit.