How to start as a well driller in Illinois, step by step

Last updated 2026-08-19

Do you need a license to start as a well driller in Illinois?

Yes. If you construct water wells for other people in Illinois, you need a water well contractor license from the Illinois Department of Public Health. Pump installation is its own license. Advertising yourself as a well driller without that card is how people get stopped.

The requirement lives in the Water Well and Pump Installation Contractor's License Act, 225 ILCS 345.^[1] IDPH runs the program under 77 Ill. Adm. Code 915.^[2] That is the well driller Illinois paper path. It is not an IDFPR trade card, which is where a lot of new people look first and then waste a week.

You still need more than the pocket card. Each well generally needs a local construction permit. The hole has to meet the Illinois Water Well Construction Code, 77 Ill. Adm. Code 920.^[3] Pump work has to meet 77 Ill. Adm. Code 925.^[4]

Helpers on a crew are a gray area people abuse. If you are the person contracting the well or holding yourself out as the contractor, get licensed. Working under a licensed contractor while you log hours is the normal path in. Weekend side jobs off the books are how you make your later application look dirty.

Homeowners punching a well on their own land is a different fact pattern. Do not assume a homeowner story covers a neighbor's farm or a paid favor. Read the Act. Then call IDPH if the job is weird.

If you already hold a card in another state, Illinois still wants Illinois paper. Reciprocity, if any exists for your file, is a Department decision. Confirm it in writing. Do not bid an Illinois well on a Texas license and hope the county never asks.

Which Illinois well licenses exist and which one do you actually need?

You need the water well contractor license to construct water wells. You need the water well pump installation contractor license to install or service pumps. Many working drillers carry both because customers want one company to finish the job.

IDPH is the agency. The Department's Private Water program is where contractor licensing actually lives.^[5] Closed loop geothermal wells are not the same paper. Illinois treats that work under the Groundwater Protection Act and the closed loop pieces of the Construction Code.^[6][3] If you plan to fuse HDPE loops for heat pumps, ask IDPH about closed loop contractor certification before you quote a geo job. A water well card is not a magic key.

Here is the practical split I would use.

Paper	Issuer	Typical work it covers	What you should confirm
Water well contractor license	IDPH	Constructing, modifying, or sealing water wells	Current application, exam dates, experience proof
Pump installation contractor license	IDPH	Installing and servicing well pumps	Whether you need it if you only drill and cap
Closed loop contractor certification	IDPH under groundwater rules	Geothermal closed loop wells	Separate application and code sections
Local well construction permit	County or local health department	That specific hole, that property	Fee, setbacks, inspections, sample rules
Business entity filing	Illinois Secretary of State	Legal name you contract under	Filing fee on the current SOS LLC guide [7]

Get both the well and pump licenses if you can pass both exams. Splitting every job with a pump contractor eats margin and scheduling. Skip closed loop paper until a real geo customer is in front of you. The code is picky and that market is lumpy.

How much experience do you need before the Illinois exam?

You need whatever documented field experience IDPH and 77 Ill. Adm. Code 915 currently require for that license.^[2] Plan on multiple years in the trade, not a weekend course. Two years of documented crew time shows up again and again in Department materials. Still read the live application, because boards amend forms.

Most people build time as a helper or driller on a licensed contractor's crew. That is the clean path. Keep dates, rig types, well types, and the supervising contractor's license number. A vague letter that says he worked here is weak. A log that matches well reports is stronger.

School is not a substitute I would bet a shop on. If Part 915 lets education offset some field time, great. Confirm it. Do not quit a paying helper job for a certificate mill.

Out-of-state experience can count if the Department accepts it. Bring licenses, well logs, and employer letters. Expect questions.

I would not sit the exam the week you think you qualify. Order the Construction Code, the Pump Code, and the License Act.^[3][4][1] Study grout and casing like they are the job, because they are.

How long does it take to become a well driller in Illinois?

Plan on years, not weeks. The long pole is field experience plus the Department's exam calendar. Entity paperwork is days. The license itself has no honest public guarantee on grading or card-in-hand time. Confirm exam dates with IDPH.^[5]

A realistic sequence looks like this. You spend a couple of years on a licensed crew, or longer if you start green. You assemble proof and file when the Department is accepting applications. You sit the exam on their calendar, not yours. You pass, you pay whatever the current license fee is, you get the card. Then you still wait on a local permit before the first hole.

If you already have years of Illinois crew time, the remaining clock is application plus the next exam date plus whatever IDPH takes to issue. I will not invent that last number. Call the Private Water program.

Buying a rig before you have a license is a common way to light money on fire. A parked rotary does not drill legal wells.

People who already run a company in Arkansas or hold Tennessee paper still need Illinois paper before they cross the line.

How much does it cost to start a well driller business in Illinois?

The license fee is not the cost. Confirm that number with IDPH, because I will not invent a board fee. The real money is the rig, support trucks, casing and grout inventory, insurance, and idle time while you learn county permit desks.

A few paper costs are public. The Illinois Secretary of State has long published a $150 fee to file Articles of Organization for a domestic LLC in its organizing guide. Confirm it on the current fee publication before you pay.^[7] An EIN from the IRS is free.^[8] "Applying for an EIN is a free service offered by the Internal Revenue Service."^[8]

Insurance is a bid, not a statute. If you have employees, budget workers' compensation. Illinois employers sit under the Workers' Compensation Act, 820 ILCS 305.^[9] Unemployment insurance registration runs through the Illinois Department of Employment Security once you have staff. General liability and inland marine on the rig will dwarf the LLC fee. Get quotes from people who already insure drillers. A cheap contractor policy that excludes subsurface work is worthless.

Used water well rigs trade in a huge range. Nobody has a clean public index for Illinois. Buy the smallest machine that can do the geology you will actually sell. Much of downstate Illinois is glacial drift over bedrock. That is a different iron conversation than a deep sandstone play in another state.

Do not spend year-one cash on a fancy shop. Rent yard space. Put dollars into casing, bentonite, a working mud system, and a bookkeeper who can keep well reports and invoices in the same week.

Wage context, not a promise: the Bureau of Labor Statistics tracks earth drillers, except oil and gas, under SOC 47-5023. Read the current Illinois row on that table before you write yourself a salary.^[10]

If you want board forms and grout-log templates in one pile, WellDrillerPath sells a $179 one-time Well Board + Grout-Log Kit. You do not need it to finish the legal path in this article.

How do you apply for the Illinois water well contractor license?

You apply to IDPH on the Department's current contractor application, you prove experience, and you sit the exam the Department schedules. Use the live forms. Old PDFs on random sites go stale.

Write IDPH Private Water and ask for the current water well contractor and pump contractor packets.^[5] Read 77 Ill. Adm. Code 915 cover to cover.^[2] That Part is the license rulebook. The Act is 225 ILCS 345.^[1]

Fill the application like an auditor will read it. Names match your driver's license. Experience dates do not overlap in impossible ways. Supervising contractor license numbers are real.

Pay only the fee the current form lists. I am not printing a fee that might be wrong next month.

Study the Construction Code and the Pump Code, not trivia.^[3][4] Know grout intervals, casing, disinfection, and what you must report. The exam is there to see if you will build a well that shares water with a septic field.

After you pass, keep copies of everything. Illinois renewals and continuing education live in Part 915. Confirm current CE hours with the Department before you buy a random class.

No approval guarantee. If they reject the experience, you work more hours and reapply. That is the job.

What construction rules control your first wells in Illinois?

77 Ill. Adm. Code 920 is the book you drill by. Location, casing, grout, disinfection, abandoned wells, and closed loops sit in that Part.^[3] Pump work is 77 Ill. Adm. Code 925.^[4]

Read the grout section twice. Poor annular seals are how private wells share water with septic fields and how you earn a complaint file. The code tells you approved materials and how the annulus gets sealed. Follow it even when a customer wants you to just hit the top with bentonite chips.

Setbacks from septic tanks, sewers, livestock yards, and other contamination sources are in the Construction Code. I am not going to recite distances here because you need the current table for that well type. Measure before you bid. A well that cannot meet separation is not a well. It is a variance request, and variances are not a business plan.

Bored wells, drilled wells in unconsolidated material, and drilled wells in rock have different details in Part 920. Do not run one casing program across the whole state.

Community public water system wells are a different regulatory world under Illinois EPA. This article is the private well path IDPH runs.^[5]

Silica dust is not in the well code, but it is on the rig. OSHA's construction silica rule applies to occupational exposures to respirable crystalline silica in construction work.^[11] "This section applies to all occupational exposures to respirable crystalline silica in construction work."^[11] Rock drilling can put you in that box. Have water on the hole and a plan. Fines cost more than a spray bar.

Do you need a permit for every well you drill in Illinois?

Almost always yes for a new private water well. Local health departments issue most construction permits under the statewide Construction Code.^[3][5] You bid after you know that county's packet, not before.

Permit desks vary. Some counties want a site sketch, septic location, and proposed depth. Some inspect grout. Some want a water sample after disinfection. Call the county environmental health staff for the property address. Do not assume one county's packet matches the next county over.

Sealing abandoned wells is also regulated work. Part 920 addresses abandoned wells.^[3] Customers will ask you to push the old one in with the backhoe. That is how you inherit a groundwater problem. Price a proper seal.

Modifications and deepenings often need a permit too. If you are unsure, ask the local health department in writing.

Geothermal closed loop fields have their own permit habits. Treat them as a different product.

A state contractor license does not replace the local permit. You need both.

What well reports and grout records does Illinois expect?

You file a water well construction report after the well is built. Illinois uses those reports in the Illinois State Geological Survey water and related wells records, often called ILWATER.^[12] The Construction Code and IDPH tell you the form, the deadline, and who gets a copy. Confirm the current number of days. I will not invent it.^[3][5]

Log lithology like you mean it. Future drillers, county sanitarians, and the Survey will read that form. Garbage in the materials-encountered box is a reputation problem.

Grout notes matter when something goes wrong. Write the mix, volume, interval, and method. If a well later shows surface water, your notes are your defense. This is the boring paper that keeps you in business.

The Illinois State Water Survey is the research shop people call when a county wants aquifer context.^[13] Their maps will not replace a driller's log. They will keep you from sounding lost in a pre-bid call.

Keep copies for the life of the company. Hard drive and paper. Floods happen.

How do you set up the business entity, tax accounts, and insurance?

File the entity first if you want the license and the invoices in a company name. Most new shops pick an Illinois LLC. Articles of Organization are a Secretary of State filing. The SOS LLC guide has long listed a $150 filing fee. Confirm it.^[7]

Get an EIN free from the IRS if you are not putting a Social Security number on every form.^[8] Register with the Illinois Department of Revenue for whatever tax accounts actually apply to your mix of labor and materials. I am not going to guess your sales tax facts. Construction contractors get this wrong. Ask a CPA who already has driller clients, or call IDOR with a written fact pattern.

Hire anyone and you step into workers' compensation and unemployment insurance.^[9] A sole owner with no employees is a different insurance conversation. Talk to a broker. Do not skip auto coverage on the water truck.

Open a separate bank account. Mix personal and well deposits for a year and you will not know if the business works.

County assumed-name filings apply if you operate under a name that is not the legal entity. Check the county clerk.

This is also when people compare Illinois with California or Colorado. Different boards. Different water law. Do not copy another state's binder.

Can you drill closed loop geothermal wells on a water well license?

Do not assume yes. Illinois carved closed loop wells out with extra code and Groundwater Protection Act requirements.^[6][3] Ask IDPH whether you need closed loop contractor certification for the exact work you want to sell.

A vertical closed loop field looks like drilling. The product is not drinking water. Grout mixes, loop materials, and abandonment rules differ. If you only have water well paper, stay on water wells until the Department says otherwise in writing.

I would not take a design-build geo bid in year one anyway. Loop fields go bad quietly. Stick to potable wells until your grout discipline is boring.

Trench loops can pull in excavators and other trades. You still verify the certification question. A verbal maybe from another driller is not approval.

What first-year mistakes waste money in Illinois?

Buying too much iron is the expensive one. Ignoring county permit lead time is the quiet one. Skipping workers' compensation because the crew is family is the one that can close you. Filing no well reports is the one that follows you.

The cheap-looking mistake is sloppy paper. IDPH and local health departments live on forms. If your application, permits, and construction reports do not match, you look like someone who also grouts sloppy.

Another waste is paying for national certificates that Illinois does not ask for, while you have not read Part 920.^[3] Spend the weekend in the code.

Do not open four counties at once. Pick a home territory. Learn those sanitarians. Become the contractor who turns in clean packets. Expand after that.

Comparing notes with how Alabama or Arizona licenses drillers is fine for curiosity. It will not pull a permit in McLean County.

Where do you confirm fees, exam dates, and forms before you spend money?

IDPH Private Water is the only confirmation that counts for the contractor card.^[5] The Illinois administrative code carries the live text for Parts 915, 920, and 925.^[2][3][4] The General Assembly hosts 225 ILCS 345.^[1] The Secretary of State publishes entity fees.^[7]

Print those documents. Call the county environmental health desk for the first job address. Then buy the rig.

WellDrillerPath is an independent publisher, not a law firm and not a service company. We do not issue licenses and we do not guarantee timing. If you want a single packet of board and grout-log templates, the optional kit is on /start. The statutes above stand on their own.

Frequently asked questions

Do you need a license for well driller in Illinois?

Yes. Illinois requires a water well contractor license from the Illinois Department of Public Health before you engage in that occupation or hold yourself out as a water well contractor. Pump installation is a second license. Local well permits still apply on top of the state card. Read 225 ILCS 345 and 77 Ill. Adm. Code 915, then confirm the current forms with IDPH.

How much does well driller cost in Illinois?

Board license fees must be confirmed with IDPH. They are not the real startup cost. An Illinois domestic LLC has long had a $150 Articles of Organization fee on the Secretary of State LLC guide. Confirm that figure before you file. An EIN is free from the IRS. The rig, insurance, casing stock, and idle time will dwarf those paper costs. Used rig prices have no official Illinois index.

How long does well driller take in Illinois?

Plan on years if you are starting as a helper, because IDPH wants documented field experience before the exam. If you already have that time, the remaining clock is the Department's application and exam calendar plus local permitting. Nobody can honestly publish a guaranteed card-in-hand date. Confirm exam sittings with IDPH Private Water. Entity filings are usually days, not the long pole.

Can I drill my own well in Illinois without a contractor license?

A homeowner fact pattern is not the same as contracting wells for other people. Do not stretch a self-help story onto a neighbor's property or a paid favor. 225 ILCS 345 is aimed at people who engage in the occupation or hold themselves out as contractors. Read the Act and ask IDPH before you turn a personal well into a side business. Local permits still apply to the hole itself.

Does Illinois license pump installers separately?

Yes. The Water Well and Pump Installation Contractor's License Act creates a water well contractor track and a water well pump installation contractor track. Many shops carry both so they can drill and set the pump under one contract. Confirm with IDPH whether the work you sell needs one card or both. Pump construction details live in 77 Ill. Adm. Code 925.

Who issues well permits in Illinois counties?

Local health departments issue most private water well construction permits, using the statewide Construction Code in 77 Ill. Adm. Code 920. The packet, fee, inspection, and water-sample rules vary by county. A state contractor license does not replace that local permit. Call environmental health for the property address before you bid. Closed loop fields can have different permit habits.

Do I need workers' compensation as a one-person Illinois drilling shop?

If you have employees, budget for workers' compensation under the Illinois Workers' Compensation Act, 820 ILCS 305, and ask a broker who already insures drillers. A true one-person shop with no employees is a different coverage conversation, and you should still carry auto and general liability that actually includes subsurface work. Cheap policies that exclude drilling are a waste.

Where do Illinois well logs get filed?

Licensed contractors file water well construction reports on the form and timetable IDPH and 77 Ill. Adm. Code 920 currently require. Those records feed the Illinois State Geological Survey water and related wells database (ILWATER). Confirm the current deadline in days with IDPH. Keep your own copy. Thin lithology notes make you look careless when a later complaint lands.

Is there reciprocity for an out-of-state well driller license in Illinois?

Do not count on walk-in reciprocity. Illinois wants its own IDPH contractor license, experience proof, and exam path under 225 ILCS 345 and Part 915. Out-of-state logs and licenses can support an application if the Department accepts them. Ask IDPH in writing before you move a rig across the line. Bidding Illinois work on a foreign card is a bad plan.

What code do Illinois water wells have to meet?

Private water wells have to meet the Illinois Water Well Construction Code, 77 Ill. Adm. Code 920. That Part covers location, casing, grout, disinfection, abandonment, and closed loops. Pump installation has its own code, 77 Ill. Adm. Code 925. Community public water wells are a different Illinois EPA world. Read the current administrative code text, not a summary someone posted years ago.

Do I need a license to seal or abandon a well in Illinois?

Treat sealing as regulated well work, not demolition. Part 920 addresses abandoned wells, and local health departments often want a permit or notification before a well is sealed. Customers will ask you to collapse the casing with a bucket. Price a proper seal instead. Confirm with the county and with IDPH whether your contractor license and the local permit cover that specific abandonment.

How do I get an EIN for an Illinois well drilling LLC?

Apply online with the IRS after the Secretary of State accepts your Articles of Organization. The IRS says applying for an EIN is a free service. Ignore any site that wants to charge you for the federal number. Use the legal name exactly as it appears on the SOS filing so your IDPH application, bank account, and invoices match.

Can I start as a helper without a contractor license?

Yes. Most people enter as helpers or drillers on a licensed contractor's crew and log the experience IDPH later wants to see. You should not contract wells or advertise yourself as the well driller until you hold the card. Keep dates, well types, and the supervising license number. That file is what makes the later application look real instead of improvised.

Sources

1. Illinois General Assembly, 225 ILCS 345 Water Well and Pump Installation Contractor's License Act: Illinois licenses water well contractors and water well pump installation contractors under this Act.
2. U.S. EPA, Private Drinking Water Wells: Private water well construction standards address grout, location, disinfection, and abandonment; Illinois codifies these in 77 Ill. Adm. Code 920.
3. U.S. EPA, Ground Water Rule: Groundwater protection frameworks govern well siting and construction alongside state closed loop well requirements.
4. Internal Revenue Service, Apply for an Employer Identification Number (EIN) Online: Applying for an EIN is a free service offered by the Internal Revenue Service.
5. Illinois Workers' Compensation Commission, About Workers' Compensation: Illinois employers with employees generally fall under the Workers' Compensation Act, 820 ILCS 305.
6. U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics, SOC 47-5023: BLS publishes employment and wage estimates for earth drillers, except oil and gas, including state rows.
7. OSHA, 29 CFR 1926.1153 Respirable crystalline silica: The construction silica standard applies to occupational exposures to respirable crystalline silica in construction work.
8. Illinois State Geological Survey: ISGS maintains Illinois water and related well records used with contractor construction reports.
9. Illinois State Water Survey, Groundwater Science: The Illinois State Water Survey publishes groundwater science used for aquifer and private-well context.