- The same test costs 45 times more in one state than another. Missouri charges a $10 handling fee. Oklahoma’s comprehensive panel is $1,015.
- Ten states will not test a private well at all. California, New Jersey, Massachusetts, Oregon, Kansas and others send you to a private lab or a county.
- Most prices published online are wrong. We found stale figures on county government sites, on a state health department’s own page, and on competing guides that claimed to be current.
Why is there no single answer to this question?
Because private wells are not federally regulated, and the testing market that grew up around them is not standardised.
The EPA states this plainly:
The quality and safety of drinking water from private domestic wells are not regulated by the Federal Government under the Safe Drinking Water Act nor by most state governments and laws.
And it adds:
The EPA is unable to provide direct assistance to private well owners.
So every state built its own answer. Some run a subsidised state lab. Some hand it to universities. Some hand it to counties. Some do not offer it at all. That is why the price of the identical test swings from free to four figures depending on your address.
What does well water testing cost in each state?
Prices below are from each laboratory’s own published schedule. Blank cells mean the lab does not publish a price for that tier, not that the service is free.
| State | Lab | Bacteria | Homeowner package | Comprehensive | PFAS |
|---|---|---|---|---|---|
| Missouri | State Public Health Lab | $10 per sample | chemical: no lab fee* | 29 analytes, no fee* | — |
| Indiana | Dept of Health | $10 + shipping | Mid panel $80 | Long panel $150 | $200* |
| Indiana | Marion County | Free | Free | — | — |
| Tennessee | TN Tech Water Center | $40 | $125 (basic chemistry) | Not offered | Not offered |
| Vermont | Health Dept Lab | $14 | $100 (Kit C) | $159 (3 kits) | — |
| Alabama | Public Health | $15 waived | — | — | — |
| Michigan | EGLE | $16 | $18 partial chem | $102 metals | $290 |
| Texas | DSHS Austin | $18.39 | $155 | $165 | Not offered |
| South Carolina | SCDES | $20 | $50 (11 analytes) | — | — |
| Rhode Island | RIDOH | $25 | $95 (Kit A) | $410 (Kit C) | — |
| Maine | HETL | $27 | $42 / $127 | $147 | — |
| North Dakota | ND HHS | $27 | — | — | — |
| New York | Westchester County | $32.10 | $383.51 | $583.10 | $749 |
| Oklahoma | DEQ | $33 | $75 | $1,015 | $265 |
| Wisconsin | State Lab of Hygiene | $35 | $450 | — | $380 |
| Georgia | UGA Extension | $36 to $50 | $20 / $85 | $60 to $122 | — |
| Maryland | MDH Labs | $41 | à la carte | — | — |
| North Carolina | via county | $50 | $185 | $335 | — |
| Pennsylvania | Penn State Extension | — | $60 (WD01) | $220 (WD08) | Not offered |
| Virginia | Virginia Tech | — | $70 (28 constituents) | — | Not offered |
| Wisconsin | UW-Stevens Point | — | $78 | $191 | — |
| Colorado | Colorado State Univ | none | $87 | $210 | — |
*Indiana’s PFAS price is from a schedule stamped March 2023 and may have changed. Missouri’s $10 is charged per sample rather than per test, so a series of tests on one sample still costs $10. Note that Missouri accepts bacteria samples directly from homeowners but requires chemical samples to be submitted through a public health agency employee, and states it does not offer testing for real estate transactions.
Which states will not test your well at all?
This surprises most people. In ten states, the government simply does not do this for private wells.
Oregon puts it bluntly on its own site: the state health authority and environmental agency “do not test (or pay for testing of) private wells.” Kansas refuses private well samples outright. The University of Massachusetts lab states it “nor does it conduct analyses for individuals.”
The full list of states where the state lab does not serve private well owners: California, New Jersey, New York, Massachusetts, Connecticut, Oregon, Washington, Minnesota, Kansas and Kentucky. In these states you go to a county programme or a private certified lab.
Separately, several states price at county level rather than state level, so there is no single number to quote: Texas, North Carolina, Ohio, Illinois, Maryland and Minnesota. The Westchester and Guilford county figures in the table above are examples, not state averages.
And some labs only quote on request: Iowa’s State Hygienic Lab, South Dakota, and Tennessee’s health department among them. Tennessee residents are generally served by Tennessee Tech’s Water Center instead, at $40 for bacteria or $125 for basic chemistry.
Minnesota is a specific case worth calling out. The Minnesota Department of Health’s own public health laboratory does not serve homeowners, and its July 2026 list of accredited labs omits itself. Everything runs through county and soil-and-water-district labs, where prices range from $25 to $150 and at least one district offers free nitrate testing with no residency restriction.
Why do the published prices you find online keep being wrong?
This is the part worth reading carefully, because it affects your budgeting.
The most-quoted Wisconsin figure online is $383. The actual price at the State Lab of Hygiene is $450. That is not a small drift, and it is not confined to blogs: Wisconsin county government pages still publish $383 today.
Washington State’s health department page currently cites costs of “$25 to $50” and labels them as 2010 figures. They are sixteen years old and still live.
A competing guide that advertised prices “verified July 2026” lists Wisconsin at $42 to $62 per test. The lab’s actual published figures are $35, $38 and $97 depending on the test.
We hit the same problem repeatedly while checking. Search snippets showed Caltest at $58 when the current price is $61. WaterCheck Lite showed $159 when it is $169. Michigan metals showed $124 when it is $102. Every one of those was caught only by opening the lab’s own page.
What should you actually test for, and how often?
The EPA and CDC agree on the annual baseline, which is narrower than most people expect. Four things, once a year:
- Total coliform bacteria
- Nitrate
- Total dissolved solids
- pH
The EPA additionally recommends testing for radionuclides every three years.
The two agencies differ slightly on triggers. The CDC treats pregnancy or the presence of young children as a reason to test; the EPA treats it as a reason to test more often. Either way, the practical answer is the same.
Two things neither agency does: neither publishes a recommended PFAS testing interval, and neither says who should pay. That gap is why PFAS pricing varies so wildly and why so few state labs offer it at all.
If your annual four-parameter test is all you need, most states will do it for $10 to $50. The expensive packages exist for specific situations: a property sale, a new well, a suspected contamination event, or a neighbourhood with known issues.
Where can you get well water tested for free?
More places than most people realise. These are real programmes with published eligibility.
| Programme | Who qualifies | What it covers |
|---|---|---|
| Delaware | Everyone, statewide | Free test kits since September 2023, previously $4 |
| Iowa Private Well Grants | All private well owners | Bacteria and nitrate annually, arsenic and manganese every three years |
| Wisconsin WellTAP | Pregnancy, child under 12, or immunocompromised, plus financial need | Bacteria, nitrate, fluoride, metals |
| South Carolina | Age 65+ or on public assistance | State lab testing |
| Maine HETL | SNAP or MaineCare recipients | Fee waivers |
| Alabama | All | $15 bacteria fee waived |
| Colorado PFAS TAP | Statewide | PFAS testing |
| Marion County, Indiana | County residents | Free |
New York runs a PFAS rebate pilot offering $5,000 and $10,000 grants, but as of August 2026 it is live in Dutchess and Putnam counties only, not statewide.
What makes one panel cost $75 and another $1,015?
The number of analytes, mostly. Oklahoma proves this inside a single lab’s own price list:
| Package | Analytes | Price |
|---|---|---|
| Basic | 4 | $75 |
| Expanded | 10 | $175 |
| Comprehensive | 30 | $1,015 |
Wisconsin’s $450 breaks down the same way: a volatile organic compounds screen at $141, a metals screen at $97, and an atrazine screen at $71, plus the rest.
Three other factors move the price:
- Subsidy. Missouri charges a $10 handling fee and no analysis fee. Alabama waives its bacteria fee outright. These are policy choices, not cheaper science.
- Lab type. University extension labs undercut state labs consistently. Virginia Tech’s 28-constituent package is $70. But see the certification warning below.
- Hidden fees. Oklahoma adds per-sample preparation charges. WaterCheck excludes return shipping. The advertised price is not always the final price.
Is the cheapest lab good enough?
For a routine annual check, usually yes. For a property sale or a legal matter, often no, and this catches people out.
- Auburn University states on its own page that it is “NOT EPA certified for drinking water.”
- Virginia Tech’s $70 package is educational and clinic-only. Virginia Tech itself refers real-estate transactions to certified labs.
- Colorado State University does not test for bacteria at all, and its lab is not certified.
- Missouri’s state lab states it “does not offer testing for real estate transactions.”
If you are buying, selling, refinancing, or dealing with a dispute, confirm the lab is state-certified before you send a sample. A cheap uncertified result may simply not be accepted.
What happened to Colorado’s state lab?
Worth knowing if you are in Colorado, because it explains why your options look unusual.
The Colorado Department of Public Health and Environment suspended state-lab chemistry testing in December 2024 after two chemists were found to have manipulated quality-control data. The EPA revoked the lab’s certification.
That is why Colorado residents in this guide are pointed to Colorado State University, which is cheaper but not certified and does not test bacteria. It is a real gap, not an oversight.
How do private labs compare?
Private mail-in labs serve the states where no public option exists, and they cost more. Keep these separate from the state figures above; they are a different market.
| Service | Price | What you get |
|---|---|---|
| Safe Home | $49.95 to $399.95 | Range of home kits |
| WaterCheck | $169 / $310 | 34 analytes / 107 analytes |
| Tap Score | $209 / $399 / $1,125 | Tiered panels |
| Tap Score PFAS | $335 | PFAS only |
A useful comparison: Tap Score’s $209 entry panel sits above Pennsylvania’s $220 comprehensive state package only marginally, and above Oklahoma’s $75 basic by nearly three times. Check your state first.
Prices that are changing soon
Three of the figures above have a known expiry, so check before you budget:
- Michigan raises its schedule on October 1, 2026: bacteria goes from $16 to $23, PFAS from $290 to $320.
- South Carolina is not accepting metals samples between June 1 and October 1, 2026. This is in effect now.
- Texas fees expire September 1, 2026.
Frequently asked questions
How much does it cost to test well water?
A basic bacteria test at a state lab costs $10 to $50 in most states, and some waive it. A standard homeowner package runs $42 to $450 depending on the state. A comprehensive panel is $102 to $1,015. Private mail-in labs charge $50 to $1,125.
Can I get my well water tested for free?
In several states, yes. Delaware provides free kits statewide. Iowa funds bacteria and nitrate testing annually through its Private Well Grants. Alabama waives its bacteria fee. Wisconsin, South Carolina and Maine offer free testing to specific groups, and Marion County in Indiana offers it free to residents.
Which state has the most expensive well water testing?
Oklahoma’s comprehensive 30-analyte panel at $1,015 is the highest published state-lab price we found. Wisconsin’s $450 homeowner package is the most expensive standard package. Both are legitimate prices for what they include rather than outliers.
Does the EPA regulate private well water?
No. The EPA states that private domestic wells are not regulated by the federal government under the Safe Drinking Water Act, nor by most state governments, and that it cannot provide direct assistance to private well owners. Testing is entirely the owner’s responsibility.
How often should I test my well?
The EPA and CDC both recommend testing annually for total coliform bacteria, nitrate, total dissolved solids and pH. The EPA adds radionuclides every three years. Test more often if you are pregnant, have young children, notice a change in taste or appearance, or have had work done on the well.
What does a well water test check for?
A basic test covers coliform bacteria and E. coli. A homeowner package typically adds nitrate, pH, hardness and common metals. A comprehensive panel adds volatile organic compounds, pesticides and a broader metals screen. Oklahoma’s tiers show the pattern: 4 analytes for $75, 10 for $175, 30 for $1,015.
Do I need a certified lab?
For a routine annual check, no. For a property sale, refinancing or a legal dispute, yes. Several cheap options are explicitly not certified, including Auburn University and Colorado State University, and Missouri’s state lab states it does not serve real-estate transactions.
How much does PFAS testing cost for well water?
Where a state lab offers it, $200 to $380. Michigan charges $290, rising to $320 in October 2026. Oklahoma charges $265. Wisconsin charges $380, plus a $300 field blank. Private labs charge around $335. Most state labs do not offer PFAS testing at all.
Why does my state not test private wells?
Because federal law does not require it and each state chose its own approach. Ten states including California, New Jersey, Massachusetts and Oregon direct private well owners to county programmes or private labs instead. Oregon states plainly that it does not test or pay for testing of private wells.
Are university extension labs cheaper than state labs?
Consistently, yes. Virginia Tech tests 28 constituents for $70 and Penn State starts at $60, against $450 for Wisconsin’s state package. The trade-off is certification: extension labs are often not certified for regulatory or transactional testing, and some do not test bacteria at all.
Is a home test kit as good as a lab test?
For a rough indication, it can be useful. For anything consequential, no. Home strips cannot detect PFAS at all, and results are not accepted for property transactions. If cost is the barrier, check whether your state offers a free or subsidised lab test before buying a strip kit.
Why do online prices for this keep being wrong?
Because almost nobody re-checks them. The widely-quoted Wisconsin figure of $383 is now $450, and Wisconsin county government pages still publish the old number. Washington State’s health department page cites costs it labels as 2010 figures. Always open the lab’s own current fee schedule.
Related reading
- Well water testing: when to call a professional
- How to test water quality at home
- Best water testing kits, ranked
- How to test your water for PFAS
- Iron in well water: signs and removal
- Why well water smells like rotten eggs
Sources
- Published fee schedules from: Wisconsin State Laboratory of Hygiene, UW-Stevens Point, Penn State Agricultural Analytical Services Lab, Oklahoma DEQ, Rhode Island Department of Health, Michigan EGLE, Virginia Tech Household Water Quality Program, South Carolina DES, Maryland Department of Health, University of Georgia Extension, Maine HETL, Vermont Department of Health, Indiana Department of Health, Missouri State Public Health Laboratory, Alabama Department of Public Health, Guilford County NC, Westchester County NY, Texas DSHS, North Dakota HHS, Colorado State University.
- US EPA, private drinking water wells guidance and RadTown radionuclide testing guidance.
- CDC, private well water testing recommendations.
- Colorado Department of Public Health and Environment laboratory suspension, December 2024, reported by Colorado Public Radio, The Colorado Sun, Denver7 and 9News.
- Published pricing from Tap Score, WaterCheck, Safe Home and Nevada WETLAB.
