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The state licenses the driller, bonds the driller, and sends a card to the well site
A license, a bond, and a card that stays with the rig
Drilling a well in Idaho is not a matter of owning a rig. The state licenses the person, bonds the person, and — the detail that surprises people — expects the proof to be sitting at the well site while the hole is open. The statute is blunt about the baseline:
“It shall be unlawful for any person to drill a well in Idaho, including wells excepted under sections 42-227 and 42-228, Idaho Code, without first complying with the provisions of this chapter. It shall be unlawful for any person to abandon a well in Idaho without first obtaining a driller’s license or receiving a waiver of the license requirement.”
— Idaho Code §42-238(2), well drillers’ licenses and operator permits. Retrieved 23 September 2026
The same section covers abandoning a well — filling in an old one takes the same license, advance authorization from the state, and a report afterward. The license is never optional:
- Drilling a well — license required, chapter complied with.
- Abandoning a well — license (or a state waiver), authorization, and a report.
What the license actually costs and requires
- The application: a $200 fee, a written or oral examination, and references plus detailed past drilling experience the director can weigh.
- The bond: a surety or cash bond of not less than $5,000 nor more than $20,000, set by the state based on the driller’s compliance history, the size and depth of wells they propose to drill, and the complexity of the work.
- The renewal calendar: licenses expire March 31 in the second year after issuance, renewed for two years at $100 plus $15 for each operator, with up to 20 hours of continuing education per licensing period.
- The card: the driller and operators must carry the card the state issues, “at all times when he is operating the drilling equipment.”
The examination factors are a window into what the state is protecting: knowledge of Idaho water law, drilling tools, underground geology and hydrology, casing types, special drilling problems, and a documented history of compliance. This is a license about protecting the aquifer, not just the customer.
Operators work under the driller’s license
Employees who run drilling equipment hold operator’s permits — a $25 application and their own exam. Two rules give the arrangement teeth:
- An operator may run equipment only for the driller named on the permit.
- The licensed driller “shall be responsible for the work of the operators.” The name on the license answers for the crew.
Where the rules get stricter
The state can designate an “area of drilling concern” aquifer by aquifer — where pressure, warm water, or contamination demand more. Inside one:
- The minimum bond rises to $10,000.
- The driller must show extra experience with pressurized or warm-water wells.
- Plans and specifications need written state approval before drilling starts.
The lesson transfers everywhere in Idaho: ask whether your ground sits in a designated area before you budget the well. And a bond, note, is more than a filing fee — it is money the state can reach. The septic trade runs the same way, which is why a customer damaged by negligent work can claim directly against an installer’s bond.
Before the rig arrives
- Ask for the driller’s license number and expect the card at the site — the statute puts it there on purpose.
- Confirm who holds the drilling permit. For an ordinary cold-water single-family domestic well the state allows an expedited start card filed at least two office hours before drilling; anything harder needs the full permit first.
- If an old well is being filled in as part of the project, confirm the abandonment authorization and the report that follows it.
- Compare the crew against the paperwork: the named driller supervises, permitted operators run the equipment, nobody else.
- Then bring the well plan to the same desk that handles your septic — (208) 656-1467 — because well and drainfield placement decide each other.
Wells and septic are permitted by different desks at different levels, but on your lot they are one system of separations. The distance tables govern both, and the septic installer’s permit is a separate credential from this license — many crews hold one, not the other.
Common questions
Does a well driller in Idaho need a license?
Yes. Idaho Code 42-238 makes it unlawful to drill or abandon a well without complying with the licensing chapter. The license involves a $200 application, an examination, references documenting past drilling experience, and a surety or cash bond of $5,000 to $20,000.
How much is the bond a well driller must post?
Between $5,000 and $20,000, set by the state based on compliance history and the size, depth and complexity of the wells proposed. Inside a designated area of drilling concern the minimum rises to $10,000.
How often does a well driller's license renew?
Licenses expire March 31 in the second year after issuance and renew for two-year periods at $100 plus $15 for each operator, with continuing education of up to 20 hours per licensing period.
Can the driller's employees run the rig?
Yes, with operator's permits - a $25 application and exam each. An operator may work only for the driller named on the permit, and the licensed driller is responsible for the operators' work.
Does a well need a permit before drilling, separate from the driller's license?
Yes. Drilling permits come from the Idaho Department of Water Resources. For a cold-water single-family domestic well the state allows an expedited start card received at least two office hours before construction; other wells need the permit issued first.
Is a license needed just to abandon an old well?
Yes. Filling in a well takes a driller's license or a state waiver, advance authorization from the director, and a report describing how the abandonment was done. Old wells are treated as ongoing risks to the aquifer, not as finished business.
How is this different from a septic installer's permit?
They are separate state credentials. A septic installer permit covers subsurface sewage systems; a well driller's license covers drilling and abandoning wells. A crew building both must hold both.
How can I verify a driller is licensed?
Ask for the license number and expect the state-issued card to be available at the well site while work is underway - the statute requires it be on hand whenever the equipment is operating. The Idaho Department of Water Resources administers the licenses.