Insured & Licensed Well Drilling Company: How to Verify

Every state regulates water well drilling, and every state requires drilling contractors to be licensed before they can legally put a rig on your property. About 40 of those states also require a surety bond and proof of liability insurance as part of the license. This guide walks through what those requirements actually mean, how to check that your driller has them current, and what happens if you skip the verification.

Why this matters more than you’d expect

Water well drilling is one of the few residential trades where unlicensed work is genuinely dangerous, not just sloppy:

• Aquifer cross-contamination. Improper grouting between the casing and bore hole lets surface contaminants (septic effluent, fertilizer, chemicals) drain straight into the aquifer. State licensing exists primarily to prevent this.
• Casing collapse. A driller who uses thin or wrong-spec casing to save money can leave you with a well that collapses 6 months later. Your only recourse is the bond — if there is one.
• Property damage liability. A 30,000-lb drill rig hits a buried gas line or septic field, and the homeowner is on the hook unless the driller carries general liability insurance.
• State Well Report not filed. Every state requires a Well Construction Report (sometimes called a State Well Log). If your driller is unlicensed, they probably don’t file these — which becomes your problem at resale, when the buyer’s lender asks for the well log.

In short: an unlicensed or uninsured driller can leave you with a well that’s contaminated, collapsing, or unrecorded — any of which costs $5,000-$30,000 to fix, and isn’t covered by your homeowners insurance.

The 4 things to verify before signing

1. Active state well driller license

Every state maintains a public license database. Search format:

• Texas: TDLR Water Well Drillers (search by company name or license number)
• California: SWRCB / CDPH well driller search
• Florida: FDEP Water Well Contractor License lookup
• Arizona: ADWR Well Drillers Licensing
• Colorado: Colorado DWR licensed well constructors
• Pennsylvania: PA DEP Licensed Well Drillers
• Georgia: GA Water Well Standards Advisory Council
• North Carolina: NCDEQ Certified Well Contractor Search
• Massachusetts: MA DEP Well Drillers Registry
• Tennessee: TDEC Water Well Driller Search
• New Mexico: NM Office of the State Engineer Driller Licensing
• Nevada: Nevada Well Drillers Licensing Board

Most state databases let you confirm:

• License is active (not expired, lapsed, or surrendered)
• Class of license matches the work (residential domestic, monitoring well, irrigation, geothermal — different classes in some states)
• No active suspensions or board complaints

If your driller’s license is showing as inactive, ask why. Sometimes it’s a paperwork lag (recent renewal not posted yet) — they should be able to show you the renewal receipt.

2. General liability certificate of insurance (COI)

Standard policy limits in 2026:

• $1,000,000 per occurrence
• $2,000,000 aggregate

Ask the driller’s office to email you a Certificate of Insurance with you listed as the Certificate Holder. This is a one-page document the driller’s insurance broker generates in 5 minutes. Real contractors do this routinely.

Two common scams to watch for:

• A generic COI without your name on it (anyone could be using that document)
• A COI that’s expired or about to expire (check the dates carefully)
• An “insurance card” instead of a COI — that’s not the same thing

3. Workers compensation insurance

If a driller’s crew member is injured on your property, you can be sued personally if the driller doesn’t carry workers comp. This is a real risk — well drilling involves heavy equipment, cable lines, and high-pressure water lines.

Verify by:

• Asking for the workers comp policy on the same COI as general liability
• For solo drillers (the owner is the only worker), most states have a sole-proprietor exemption that’s legitimate — but ask to see the exemption certificate

4. Surety bond (in states that require it)

About 40 states require well drillers to post a bond — typically $5,000-$25,000 — as a financial guarantee against improper work. The bond protects the homeowner: if the well fails because of contractor negligence within the bond period, you can file a claim against the bond.

States that require bonds (incomplete list, verify locally):

• California (SWRCB), Texas (TDLR), Arizona (ADWR), Colorado (DWR)
• Florida (FDEP), Massachusetts (DEP), New York (DEC)
• Most Midwest states (OH, IN, MI, IL, WI, MN)
• Most Mountain West states (NM, NV, UT, WY)

Ask the driller’s office for the bond number and the surety company name. You can verify the bond is active by calling the surety company directly.

What to do if you find issues

• License is “inactive” or “expired”: ask for documentation of recent renewal. If they can’t produce it within 24 hours, walk.
• No COI offered: walk. This is a deal-breaker.
• COI doesn’t list workers comp: ask why. If the driller is solo, ask for the sole-proprietor exemption certificate. If they have a crew, walk.
• License matches a different name than the company on the quote: this happens with subcontractor relationships. Ask who’s actually doing the drilling and verify their license.
• Bond required by state but not produced: walk.

Insured-driller-only quote comparison

If you’d rather skip the verification process, every contractor in our quote-comparison network has been pre-verified for active state licensing, current general liability and workers comp insurance, and the appropriate bond where required. The form below routes your project to 2-3 verified local drillers. ## Related guides

• How to Find a Top-Rated Well Drilling Contractor — the broader vetting checklist
• Water Well Cost Overview (2026) — total project pricing breakdown
• Arizona Well Drilling Cost (2026) — Arizona-specific licensing notes (ADWR + ROC verification)
• Questions to Ask Well Drillers Before You Hire
• Water Well Drilling Cost Per Foot (2026)