Where to Get Your Well Water Tested by a Certified Lab

Guide type: How-to
Last reviewed: 2026-11-04
Sources: 22 cited
Lab-tested by us: No. How we research

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Short answer

In the US, use a lab certified by your state for drinking water: the EPA lists every state's certification program, and your local health department may test for free. In Canada, start with your province: Ontario and Newfoundland and Labrador test well water for bacteria for free; the other provinces point you to accredited labs. For bacteria, get the sample to the lab fast: Ontario and Saskatchewan need it within 48 hours, Alberta within 24.

Canada: start with your province

Health Canada says your provincial drinking water authority or local public health unit can help you find an accredited lab¹. Here is what each province offers for private wells.

Private well testing · by province
Province	Where to test	Bacteria test fee	Sample limit
Ontario	Public Health Ontario: bottles from health units; bacteria only²	Free³	48 hours; results in 2–4 business days²
Newfoundland and Labrador	Government Service Centres⁴	No fee required⁴	Not stated; no samples on Fridays⁴
Québec	Labs accredited by the environment ministry, listed by region⁵	Paid⁵	Ask the lab
Alberta	Bottles at many Alberta Health Services sites⁶	Not stated on the current page	24 hours; results in 2–3 days⁶
British Columbia	Qualified labs in the CALA directory⁷	Paid (private labs)	Ask the lab
Nova Scotia	Nova Scotia Health labs and a provincial list of labs⁸	Paid⁹	Ask the lab
New Brunswick	RPC, the provincial lab; kits from Service New Brunswick or RPC¹⁰	Paid¹¹	Keep cool, ship with an ice pack¹⁰
Manitoba	A provincial list of accredited labs¹²	Low-cost through a provincial subsidy¹³	Ask the lab
Saskatchewan	Roy Romanow Provincial Laboratory; bottles at RM and public health offices¹⁴	Paid¹⁴	48 hours¹⁴

Fee status as stated on each official page, November 2026. Prices change: ask the lab.

Two things to know in Ontario: the free test covers bacteria only, and for nitrate or other chemicals the province says to send a sample to a private accredited lab³.

Free provincial bacteria test (Ontario)

Public Health Ontario Well Water Testing

No NSF/ANSI listing found

Tests: total coliforms and E. coli only
Fee: free for private wells
Sample limit: tested within 48 h of collection
Results: 2–4 business days, online portal

Strengths

Free, so you can test several times a year
Fast results through an online portal

Drawbacks

No nitrate, arsenic or other chemicals
Ontario only; the bottle must reach a drop-off within 48 hours

Good fit: Ontario well owners doing routine bacteria checks, or retesting after shock chlorination.
Skip it if: you need chemical results, or live outside Ontario.

In Québec, the province recommends bacteria tests (E. coli, coliforms) at least twice a year and chemical tests (uranium, arsenic, nitrates, manganese and others) at least once while you use the well¹⁵. The ministry’s list of accredited labs is sorted by region; several regions have no lab of their own⁵.

United States: a state-certified lab

The EPA does not test well water. It says owners can contact their state’s certification program, or contact a certified lab and pay for the test¹⁶. Certified labs must use EPA-approved methods¹⁷. Your local health department may also offer free private well testing¹⁸.

Official finder (US)

EPA list of state drinking water lab certification programs

No NSF/ANSI listing found

What it is: contacts for each state's certification program
Leads to: the state's list of certified labs
Cost: the list is free; labs charge for tests
Covers: all states and territories

Strengths

The official route to a state-certified local lab
Local labs suit bacteria tests, which can't wait in the mail

Drawbacks

Not one list: you open your state's program
The EPA itself does not test water

Good fit: US well owners who need a certified result, for a home sale or a loan for example.
Skip it if: you live in Canada.

Mail-in lab kits

Mail-in services ship you bottles and a return label, and a lab runs the tests. They are useful for full chemical panels, which are not urgent. They are a poor fit for bacteria: provincial labs test bacteria samples only within 24 to 48 hours of collection^2,6,14. A day or two in the mail eats most of that. Our test kits guide compares the US mail-in kits we catalogued.

Accreditation, in plain words

What the labels on a lab report mean
Label	Where	What it means
State certified	US	The state checked that the lab can run the official drinking water tests with EPA-approved methods¹⁷
NELAP / TNI	US	Accreditation for environmental labs run by The NELAC Institute; labs are searchable online¹⁹
ISO/IEC 17025	International	The standard for testing-lab competence that CALA and others accredit against²⁰
CALA	Canada	Accreditation of environmental labs, for a defined list of tests (the “scope”)²⁰
Ontario licence	Ontario	Drinking water testing licensed by the environment ministry, with tests accredited by CALA²¹
Ministry accreditation	Québec	Labs accredited by the environment ministry for drinking water tests⁵

Accreditation covers specific tests, not the whole lab²⁰. Before you order, check that the tests you need are on the lab’s list.

What to ask the lab

Which tests, and in which units? Nitrate can be reported as nitrogen or as nitrate (10 mg/L as N equals 45 mg/L as nitrate)²².
Which bottle, and how to sample? Health Canada says accurate results also depend on following the lab’s sampling instructions¹.
What is the time limit, and when can I drop off? Some sites refuse samples on Fridays or before holidays⁴.
How long until results? Bacteria is fast (2 to 4 business days in Ontario², 2 to 3 days in Alberta⁶); chemistry can take 6 to 8 weeks in Alberta⁶.

Questions

Is well water testing free in Canada?

For bacteria, it is free in Ontario through Public Health Ontario and in Newfoundland and Labrador, where the province states no fee is required. Manitoba offers low-cost bacteria testing through a subsidy. Elsewhere you pay an accredited lab.

Can I mail a bacteria sample to a lab?

Only if it arrives within the lab's time limit: 48 hours in Ontario and Saskatchewan, 24 hours in Alberta. A local lab or drop-off point is safer for bacteria. Chemical tests are less time-sensitive.

Does the EPA test well water?

No. The EPA says it cannot test drinking water on request. It points well owners to their state's certification program or to a certified lab they pay directly.

What does accredited mean on a lab report?

An outside body has checked that the lab can run specific tests correctly. CALA notes that accreditation covers a defined list of tests, so check that yours are on it.

Bottom line

Start local. In Canada, your province's program is the cheapest and fastest route for bacteria, and free in Ontario and Newfoundland and Labrador. In the US, your state's certified labs or your health department. Use mail-in kits for full chemical panels, where a day or two in the mail doesn't matter.

Related guides

Well water test kits: what each one checks · what to test, and how often
Coliform in well water: what to do after a positive test
How to shock chlorinate a well

What we checked, and what we didn't

Checked

Each province's program, fee status and sample time limit, on the provincial or public lab page
The US EPA's lab certification pages
What CALA, NELAP and ISO/IEC 17025 accreditation cover, on the accreditors' pages

Not checked

Current prices: they change, so ask the lab
Prince Edward Island's program: its pages blocked our reading
Sample time limits in Québec, British Columbia, New Brunswick and Manitoba: not published on the pages we read

Sources

Be Well Aware: Test your well water · Health Canada
Well Water Testing (Private Drinking Water) · Public Health Ontario
Testing and treating private water wells · Government of Ontario
Water Supply Testing, Private · Government of Newfoundland and Labrador
Laboratoires accrédités offrant des services spécifiques à l'analyse de l'eau potable · CEAEQ, Gouvernement du Québec
Testing Your Drinking Water in Alberta · MyHealth Alberta (Alberta Health Services)
Well Water Testing, HealthLinkBC File #05b · Province of British Columbia
Labs that test drinking water · Nova Scotia Environment
Water Testing · Nova Scotia Health
Testing and maintaining safe drinking water · Government of New Brunswick
Drinking Water Testing · RPC (New Brunswick Research and Productivity Council)
Water Testing Laboratories in Manitoba · Government of Manitoba
Bulletin #2026-15: Private Well Water Testing Reminder · Manitoba Environment and Climate Change
Getting Water Tested · Roy Romanow Provincial Laboratory, Saskatchewan Health Authority
Analyse de l'eau potable d'un puits · Gouvernement du Québec
Contact Information for Certification Programs and Certified Laboratories for Drinking Water · U.S. EPA
Drinking Water Laboratory Certification Program · U.S. EPA
Protect Your Home's Water · U.S. EPA
The NELAC Institute · The NELAC Institute (TNI)
Directory of Accredited Laboratories · Canadian Association for Laboratory Accreditation (CALA)
Accreditation and Licensing · Public Health Ontario
Guidelines for Canadian Drinking Water Quality: Summary Table · Health Canada

Revision history

2026-11-04

First version, built from provincial, public lab and US EPA pages.