Radon in Kingston (2026): The Municipal Program, KFL&A Public Health Testing, and What Kingston Homeowners Should Do

Flat-vector map of Canada with a coral red pin marking Kingston, Ontario, alongside a circular badge showing 8% — Ontario's provincial share of homes above the Health Canada radon guideline

A note before you read. This article is general health and home-testing information for Kingston homeowners, builders, and real estate professionals, drawn from Health Canada, the City of Kingston, KFL&A Public Health, Cancer Care Ontario, Tarion, and the Canadian Cancer Society. It is not medical advice and is not legal or building-code advice. See full disclaimers at the bottom.

If you live in Kingston, there are two distinctive things you need to know about radon. First: Kingston has its own municipal radon construction program for new low-rise residential buildings (permits applied for after August 31, 2019) — a Building Code compliance regime that puts Kingston in a small group of Ontario municipalities (alongside Guelph, Hamilton, and Niagara Region) with municipal-level radon programs. Second: KFL&A Public Health (the public-health authority for Kingston, Frontenac, and Lennox & Addington) actively warns about high radon in the region and sells certified radon test kits at multiple regional offices for just $20, alongside running ongoing community-level testing and analysis programs.

KFL&A Public Health analyzed data from over 1,000 radon tests in homes across Kingston, Frontenac, and Lennox & Addington, and the results led the agency to publicly characterize local radon as a meaningful concern — Kingston's geology (sitting on the southern edge of the Canadian Shield) produces elevated background radon in many surrounding areas. Combined with Ontario's Tarion warranty (up to $50,000 of mitigation for qualifying new builds), Kingston has multiple layered protections worth understanding.

This guide walks through Kingston's municipal program, the KFL&A Public Health testing landscape, and the practical step-by-step from "I want to know" to "result in hand."

TL;DR for Kingston homeowners and builders

  • Kingston has a mandatory radon mitigation strategy for new low-rise residential construction (permits applied for after August 31, 2019), aligned with Ontario Building Code requirements.
  • KFL&A Public Health has identified high local radon levels and sells certified radon test kits at $20 through its Kingston, Napanee, Sharbot Lake, and Cloyne offices.
  • KFL&A analyzed over 1,000 radon tests across Kingston, Frontenac, and Lennox & Addington — the data supports the public health authority's "high levels of radon found in KFL&A" characterization.
  • The only way to know your home's level is to test it. Long-term test, 91+ days, ideally during the heating season. Order a $89 long-term radon test kit → (or pick up a $20 KFL&A kit if you prefer the local provincial-Crown lab pathway).
  • Ontario new-build owners also have Tarion warranty coverage of up to $50,000 for radon mitigation if a qualifying long-term test shows above 200 Bq/m³.

Table of contents

  1. Kingston's municipal radon construction program
  2. KFL&A Public Health testing — the local provincial pathway
  3. What the published Kingston/Frontenac radon data shows
  4. Why Kingston radon is elevated — geology and construction
  5. What to do as a Kingston homeowner
  6. Tarion warranty coverage for Kingston new-build owners
  7. Local Kingston resources
  8. FAQ — Kingston-specific questions
  9. Disclaimers
  10. Sources

Kingston's municipal radon construction program

The City of Kingston's response to documented elevated local radon includes a municipal construction-permit framework for new low-rise residential buildings: building code compliance for radon mitigation is required for new low-rise residential construction permits applied for after August 31, 2019. The municipal strategy aligns with Ontario Building Code radon-mitigation requirements and operates as part of Kingston's broader response to KFL&A Public Health–identified radon concerns.

For builders and homeowners navigating new construction in Kingston, the core points:

  • New low-rise residential buildings (permits post–August 31, 2019) are subject to radon mitigation building code compliance.
  • Subsequent updates to the 2024 Ontario Building Code (in force province-wide January 1, 2025) introduced standardized radon construction provisions for all Part 9 residential buildings — Kingston's municipal framework operates within and alongside this provincial overlay.
  • For specific construction compliance questions on a Kingston building, always verify current requirements directly with the City of Kingston's Building Services.

Source: City of Kingston — Radon Gas Mitigation

Order a $89 long-term radon test kit →

KFL&A Public Health testing — the local provincial pathway

KFL&A Public Health (the public-health authority for Kingston, Frontenac, and Lennox & Addington) is one of the more active Ontario public-health agencies on radon. The agency runs multiple programs:

$20 certified radon test kits. KFL&A Public Health sells certified radon tests for $20, available for in-person purchase at KFL&A offices in Kingston, Napanee, Sharbot Lake, and Cloyne. This is a low-cost local testing pathway for KFL&A residents who prefer to support local public health programs.

Community-level testing program. KFL&A has analyzed data from over 1,000 radon tests across the Kingston, Frontenac, and Lennox & Addington region. The aggregated data informs the agency's public messaging about local radon risk — in KFL&A's own published phrasing, "high levels of radon found in KFL&A."

Free testing programs (historical/periodic). KFL&A has at various points offered free radon testing to eligible Kingston, Frontenac, and Lennox & Addington homeowners as part of community testing initiatives. Verify current program availability directly at kflaph.ca.

For Kingston homeowners deciding between testing options:

  • KFL&A Public Health $20 kit: in-person purchase, supports local public health, requires a trip to one of the four KFL&A offices.
  • RadonTest.ca $89 all-in kit: online order, delivered to your door, prepaid tracked Canada Post return label, analysis at C-NRPP-listed Lex Scientific in Guelph, lab report PDF delivered to your inbox — no in-person trip required.

Both are valid pathways for the same Health Canada–recommended long-term test type. Choose based on your preference for local in-person purchase vs. online convenience.

What the published Kingston/Frontenac radon data shows

Kingston-region radon data is documented through KFL&A Public Health, the City of Kingston's program rationale, and the broader Ontario context:

  • KFL&A Public Health analyzed over 1,000 home radon tests across Kingston, Frontenac, and Lennox & Addington — sufficient data to support the agency's "high levels of radon found in KFL&A" public characterization.
  • Ontario provincial average (2012 Cross-Canada Survey): about 8% of homes above the 200 Bq/m³ guideline (Health Canada). KFL&A's region tests above the Ontario provincial average due to local geology.
  • Cancer Care Ontario notes that radon risk varies significantly across Ontario, with the Kingston region falling in the higher-risk category.

The takeaway: Kingston is in a part of Ontario where local radon is meaningfully elevated relative to the provincial average — which is why both the City and KFL&A Public Health have committed to dedicated radon programs. The only way to know your specific home's level is a long-term radon test.

Order a $89 long-term radon test kit →

Why Kingston radon is elevated — geology and construction

Three factors stack to produce Kingston's elevated residential radon:

1. Geology. Kingston sits at the southern edge of the Canadian Shield — the Frontenac Arch — with bedrock containing varying levels of uranium-bearing rock. Rural areas of Frontenac County (north of Kingston) and Lennox & Addington (west) sit on geology that produces meaningfully elevated background radon. Even within the City of Kingston, areas closer to the Shield bedrock tend to test higher than areas on the St. Lawrence Lowlands.

2. Climate. Kingston has a typical Eastern Ontario heating season — October through April — with cold winter temperatures that lead to homes being sealed against the weather. Furnaces and HVAC systems run regularly, and the natural "stack effect" actively pulls soil gas into basements during the heating season.

3. Building construction. Kingston's housing stock includes older heritage homes (especially in the historic downtown and student areas near Queen's University), suburban single-family construction, and rural acreage in the surrounding KFL&A region. Older homes typically lack any radon construction features; newer Part 9 homes built since January 2025 fall under the 2024 OBC; and Kingston-specific municipal compliance applies to new low-rise residential builds permitted after August 31, 2019.

The combination — Frontenac Arch / Shield-influenced geology + Eastern Ontario heating season + mixed-era housing stock — is why Kingston needs a stronger radon focus than many other Ontario municipalities, and why every Kingston home is worth testing individually.

What to do as a Kingston homeowner

Step-by-step:

Step 1: Test (long-term, 91+ days). Health Canada's recommended test for a homeowner mitigation decision is a long-term alpha-track lab test, deployed for at least 91 days during the heating season (October–April in Kingston), in the lowest lived-in level of your home. Two pathways:

  • Online order: RadonTest.ca $89 all-in kit — kit + tracked outbound + prepaid tracked Canada Post return label + analysis at Lex Scientific in Guelph (a C-NRPP-listed Canadian lab). Delivered to your door, lab report PDF to your inbox.
  • Local in-person: KFL&A Public Health $20 kit — purchase at KFL&A offices in Kingston, Napanee, Sharbot Lake, or Cloyne.

Step 2: Read your result. Below 200 Bq/m³, no mitigation is required (Health Canada recommends retesting every 5 years). Above 200 Bq/m³, mitigation is recommended. See our How to Read Your Radon Test Results and What to Do If Your Radon Level Is Above 200 Bq/m³ guides.

Step 3: Mitigate, if needed. A C-NRPP-certified mitigation contractor installs a sub-slab depressurization system at a typical Ontario cost of $2,500–$4,500. These systems typically reduce radon by up to 95% (Health Canada cites reductions of more than 80%; CARST cites up to 95%). Find a Kingston-area C-NRPP-certified mitigator via the C-NRPP Find a Professional tool.

Step 4: Apply for Tarion warranty coverage (if applicable) AND/OR the Lungs Matter grant. See the Tarion section below. The Canadian Lung Association's Lungs Matter program offers up to $1,500 for eligible Canadians.

Step 5: Verify. Once mitigation is complete, run an independent post-mitigation test to confirm levels are below 200 Bq/m³.

Order your Kingston kit — $89 →

Tarion warranty coverage for Kingston new-build owners

If you bought a new home in Kingston with an Agreement of Purchase and Sale signed on or after February 1, 2021, and the home is within its 7-year warranty window, Tarion covers up to $50,000 of radon mitigation if a qualifying long-term test (≥3 months, C-NRPP-certified device, lab analysis, conducted in the basement) shows levels above 200 Bq/m³. The warranty travels with the home to subsequent owners.

For Kingston new-build owners, this means two layers of protection: the municipal program ensures appropriate radon-aware construction at build time, and the Tarion warranty covers mitigation costs if the construction wasn't enough.

For the full claim process, see our Tarion radon warranty claim guide. Note: meeting the test-type criteria is one of several conditions for a Tarion claim.

Local Kingston resources

Note on Ontario building code. New-build Kingston homes are subject to both the 2024 Ontario Building Code (province-wide radon rough-in requirement) and Kingston's municipal radon mitigation strategy.

Note on Ontario real estate disclosure. Ontario uses OREA's Form 220 (SPIS), which is voluntary but, once completed, requires truthful answers. The latent-defect doctrine applies. See our Real Estate Radon Guide.

FAQ — Kingston-specific questions

Does Kingston have a mandatory radon program for new construction? Yes. The City of Kingston requires building code compliance for radon mitigation for new low-rise residential construction permits applied for after August 31, 2019. The municipal strategy aligns with Ontario Building Code radon mitigation requirements. Verify current requirements directly at the City of Kingston's Radon Gas Mitigation page.

Where can I get a $20 radon test kit in Kingston? KFL&A Public Health sells certified radon test kits for $20 at four office locations: Kingston, Napanee, Sharbot Lake, and Cloyne. Verify availability directly at kflaph.ca.

KFL&A $20 kit or RadonTest.ca $89 kit — which should I pick? Both are valid pathways for the same Health Canada–recommended long-term test type. The KFL&A $20 kit requires in-person purchase at one of four offices and supports local public health. The RadonTest.ca $89 kit is delivered online to your door, includes prepaid tracked Canada Post return shipping, and is analysed at a C-NRPP-listed Canadian lab — no in-person trip required. Pick based on your preference for local in-person vs. online convenience.

How common is high radon in Kingston? KFL&A Public Health analyzed over 1,000 home radon tests across Kingston, Frontenac, and Lennox & Addington and characterizes local radon as "high levels of radon found in KFL&A." Specific KFL&A-region rates exceed the Ontario provincial average of about 8% above the 200 Bq/m³ guideline due to local geology. The only way to know your home's specific level is to test it.

Why is Kingston higher than the rest of Ontario? Kingston sits at the southern edge of the Canadian Shield (the Frontenac Arch), with bedrock containing meaningfully more uranium than the sedimentary rock under southern Ontario. Combined with a long heating season and varied housing stock, this produces elevated background radon.

Are some Kingston neighbourhoods worse than others? Yes — Kingston's geology varies substantially, with areas closer to the Frontenac Arch / Shield bedrock generally testing higher. Rural Frontenac County and Lennox & Addington (north and west of the City) are notably elevated. Individual home levels vary substantially even within neighbourhoods, and the only way to know your specific home's level is to test it.

Does my newer Kingston home have a radon rough-in? If your home was built under the 2024 Ontario Building Code (in force January 1, 2025) or under Kingston's post–August 2019 municipal compliance regime, it should have a capped vent pipe stub through the basement slab. Older Kingston homes generally do not.

Can I claim Tarion warranty coverage if my new Kingston home tests above 200 Bq/m³? Possibly. If your home is in its 7-year Tarion warranty window from the original possession date, and you have a qualifying long-term test result above 200 Bq/m³, you may be able to claim up to $50,000 of Tarion-covered mitigation (for APS signed on or after February 1, 2021). See our full Tarion radon warranty claim guide.

How much does radon mitigation cost in Kingston? Typical Ontario residential mitigation costs are $2,500–$4,500 for a sub-slab depressurization system installed by a C-NRPP-certified contractor. The Canadian Lung Association's Lungs Matter program may offset up to $1,500 for eligible homeowners.

Do I have to disclose elevated radon when I sell my Kingston home? Ontario uses OREA's Form 220 (SPIS), which is voluntary but, once completed, requires truthful answers. The latent-defect doctrine applies under common-law principles, and a known elevated radon reading is generally treated as a material defect requiring disclosure. See our full Real Estate Radon Guide.

When is the best time of year to test in Kingston? The heating season — October through April — produces the highest indoor radon levels and is the recommended testing window per Health Canada.

Where can I find a C-NRPP-certified radon mitigator in Kingston? The C-NRPP Find a Certified Professional directory lists certified measurement and mitigation professionals by area.

Test your Kingston home — $89, all in (or $20 via KFL&A)

Kingston is in a higher-radon part of Ontario, KFL&A Public Health has documented this clearly, and the City of Kingston has implemented a dedicated municipal program in response. Whether you choose the RadonTest.ca $89 all-in kit (online, delivered, full Canadian lab service) or the KFL&A $20 kit (in-person at one of four KFL&A offices), the goal is the same: a long-term radon test that produces a real lab result.

RadonTest.ca — $89 all-in (plus applicable tax). Long-term 91-day alpha-track test kit. C-NRPP-listed device. Analysed at Lex Scientific in Guelph, Ontario — Canadian lab, C-NRPP listed, ISO/IEC 17025 accredited by CALA. Tracked Canadian shipping both ways. Written lab report PDF delivered to your inbox.

Order — $89 →

Important disclaimers

Not medical, legal, or building-code advice. This article provides general health and home-testing information for Kingston homeowners and builders drawn from publicly available City of Kingston, KFL&A Public Health, Health Canada, Cancer Care Ontario, Tarion, and Canadian Cancer Society materials. It is not medical advice, legal advice, building-code advice, or warranty advice. For specific construction compliance questions, consult Kingston's Building Services directly. For legal matters, consult a qualified Ontario real estate lawyer.

Kingston municipal program. Statements about Kingston's municipal radon construction program reflect the City of Kingston's publicly available Radon Gas Mitigation page. Specific requirements may evolve. Verify current requirements directly with the City of Kingston's Building Services before relying on this article for a specific build. RadonTest.ca does not administer the municipal program.

KFL&A Public Health programs. Statements about KFL&A's $20 kit pricing, office locations, and free-testing programs reflect publicly available KFL&A Public Health information. Verify current pricing, availability, office hours, and program eligibility directly at kflaph.ca before relying on the program. RadonTest.ca is independent from KFL&A Public Health.

Statistics and citations. The "over 1,000 radon tests" figure and "high levels of radon found in KFL&A" characterization reflect publicly available KFL&A Public Health reporting. Ontario provincial figures are from Health Canada's 2012 Cross-Canada Survey of Radon Concentrations in Homes. National figures are from Health Canada's Radon: What You Need to Know fact sheet (2025). Sources update published figures periodically.

Mitigation cost. The $2,500–$4,500 mitigation cost range is a typical Ontario residential figure. Actual costs vary by home, foundation, complexity, and contractor.

Tarion qualification. Statements that the alpha-track test "qualifies" or "meets Tarion test-type criteria" mean only that the test method matches Tarion's published test requirements. They are not a representation that any specific home, test, or claim will be approved. A complete Tarion radon warranty claim requires several conditions — see our Tarion claim guide and tarion.com for the complete requirements. RadonTest.ca is independent from Tarion and from the City of Kingston.

Lungs Matter grant. Eligibility, grant amounts, and program availability for the Canadian Lung Association's Lungs Matter program may change. Verify directly at lung.ca before relying on the program.

Real estate disclosure. Statements about Ontario real estate disclosure reflect general OREA / common-law latent-defect principles. Specific obligations for any individual transaction depend on the facts; consult an Ontario real estate lawyer.

No diagnosis or treatment claims. RadonTest.ca sells radon test kits. We do not diagnose, treat, or prevent disease.

No warranty as to completeness. RadonTest.ca makes no warranty as to the completeness or accuracy of the information herein and accepts no liability for decisions made in reliance on this article.

Sources & further reading

Kingston-specific

Ontario-specific

Health Canada / national

National associations and grants

Related RadonTest.ca articles