Last checked: October 22, 2026

Directory of licensed well and water professionals

Looking for someone to repair a well pump, drill a new well, test your water, install treatment or inspect a home with a well? Every entry here comes from an official state or county license, registration or certification list, and links back to it. Nobody can pay to be added to, removed from or moved up in these lists, and we don't add anyone by hand. Any paid "Featured" spot is shown separately and always labeled as an advertisement (how featured spots work).

Choose your state

• MichiganMichigan registered water well drilling contractors and pump installers from EGLE's 2027 directory, plus EGLE-certified drinking water labs, with how to check a registration yourself.489 drillers/pump installers, 170 labs
• New YorkHow New York registers water well contractors and certifies drinking water labs, and how to look up a registered contractor or ELAP-certified lab yourself. Includes New York's licensed home inspectors from the Department of State's open data.0 drillers/pump installers
• North CarolinaNorth Carolina certified well contractors (by employer), state-certified commercial drinking water labs and licensed home inspectors, from official state lists, with how to check a certification or license.891 drillers/pump installers, 88 labs
• PennsylvaniaPennsylvania licensed water well drillers from the DCNR database, Chester County Health Department licensed drillers, and DEP-accredited drinking water labs, with how to check a license yourself.286 drillers/pump installers, 113 labs
• TexasTexas licensed water well drillers and pump installers from TDLR's license data by county, plus TCEQ-listed water treatment specialists, with license endorsements, expiration dates and how to check a license yourself.986 drillers/pump installers
• WisconsinWisconsin DNR licensed water well drillers and pump installers by county, plus labs certified to test drinking water for coliform bacteria, with how to check a license yourself.1588 drillers/pump installers, 136 labs

More states are on the way, starting with the states that have the most homes on private wells. Until your state is here, the state pages on States & counties link to official lookups where they exist.

Water treatment dealers

We list water treatment dealers (softener, filter and treatment system installers) only where a state publishes an official license list. A few states license this work. Where a state publishes its license list we load it (so far Texas: TCEQ Water Treatment Specialists), and where we've found a state license without a usable list, it's noted on that state's page, so check with your state too. To find someone with a voluntary credential, use these lookups. They are run by private trade associations, not by any government agency. A listing there is not a state license, and these groups mostly list their own members:

• Water Quality Association (WQA): Find a WQA-certified professional (people who hold WQA's voluntary certifications) and find WQA-certified treatment products (products WQA has tested and certified).
• National Ground Water Association (NGWA): Find a water well contractor on NGWA's wellowner.org (NGWA members; NGWA says it "neither endorses nor guarantees the work of any company listed")¹ and the directory of NGWA-certified professionals.

Before you buy treatment, get your water tested by a state-certified lab (each state page lists or links them) and run the results through the free Well Test Results Checker, so you only treat for what's actually in your water.

Home inspectors and well inspections

A standard home inspection usually doesn't include a full check of the well. If you're buying or selling a home with a well, ask the home inspector whether they do a well flow (yield) test and water sampling, which state-certified lab runs the samples, and whether they look at the well cap, pressure tank and pump controls. Otherwise, hire a licensed well contractor for the well itself and a certified lab for the water. Are you a home inspector? See our well inspection guide for home inspectors.

NGWA (the National Ground Water Association, a private trade group) recommends a yearly well checkup by a qualified water well professional: a flow test, checks of the water level, pump, pressure tank and switch, a sanitary and code check, a coliform bacteria and nitrate test (plus anything of local concern), and a written report.² To find one, use NGWA's contractor lookup on wellowner.org and its certified professionals directory. These are run by a trade association, not a state agency, so still check the state license.

Where a state publishes its home inspector license list, we load it on that state's page (currently North Carolina and New York). Other states we cover: Texas licenses inspectors through the Texas Real Estate Commission, but TREC's public data file doesn't include a location, so use TREC's license holder search. Wisconsin credentials home inspectors through DSPS, which sells its list rather than publishing it, so use DSPS's credential search. Pennsylvania and Michigan don't have a state license list for home inspectors that we could use.

What's in the directory

• Licensed well drillers and pump installers, from the state agency (and in some places the county health department) that licenses, registers or certifies them.
• State-certified drinking water labs, from the state's laboratory certification lists. Many certified labs are city water plant or industry labs that only test their own samples, so call before you send a sample.
• Water treatment professionals only where an official list exists. Most states don't license treatment dealers; Texas does, and we load TCEQ's public list of Water Treatment Specialists.
• Licensed home inspectors, where the state publishes its license list (North Carolina and New York so far). See home inspectors and well inspections for the other states.

Each state page also explains how that state licenses well contractors, how to check a license yourself, and what to ask and check before you hire.

How we build it

1. We download the official list (web database, spreadsheet or PDF) from the state or county agency.
2. A script copies the name, town, county, license type and number, and phone exactly as published. If a list doesn't publish a phone number or website, we don't add one.
3. Each row links to the list it came from and shows the date we checked it. We recheck lists periodically. Licenses expire and lists change between our checks, so always verify with the state.

Featured spots never change the order or content of the official-data lists. A business that buys one must hold a current license or certification on the official list, and the spot is labeled as paid. See Advertise / get featured.

Found a mistake? Email [email protected].