
Radon Risk
Radon Test & Risk Check: Co. Mayo
Check any Co. Mayo home against the EPA radon map, alongside flood, BER, planning and more.
Free snapshot. Enter an Eircode and we'll find the property. No card, no account.
About Mayo
Radon Risk in Co. Mayo
In EPA measurements to end-2019, 17.6% of homes tested in Mayo were at or above the Reference Level of 200 Bq/m³, above the national share of 14.1% of homes tested. Because testing was promoted hardest in known high-radon areas, these are shares of homes tested, not of all homes in Mayo. Radon is Ireland's leading cause of lung cancer after smoking, making a radon check essential for any property buyer in Mayo. PropertyPack includes EPA radon zone data and risk classification for any Eircode in Castlebar, Ballina, Westport and surrounding areas.
Co. Mayo at a Glance
- Population
- 137,000
- Province
- Connacht
- Coastline
- Coastal county
- Character
- Predominantly Rural
- Main Rivers
- Moy, Erriff, Robe
- Median Price (2026)
- €230,000 (+4.5% YoY)
- Radon (of homes tested)
- 17.6% at/above 200 Bq/m³
- Recorded Flood Events
- 225
- Mica/Pyrite (DCB Scheme)
- County designated
Sources: Property Price Register (sales to 2026); EPA radon measurements to 2019 (self-selected sample, % of homes tested, not prevalence); past flood events derived from OPW floodinfo.ie data; DCB scheme designations via gov.ie.
Major Towns
Radon Levels Measured in Co. Mayo
The EPA measured radon in 5,076 Co. Mayo homes up to the end of 2019. 895 of them (17.6% of homes tested) came in at or above the 200 Bq/m³ Reference Level. Radon is linked to around 350 lung cancer cases in Ireland every year, and the only way to know a home's level is to test it.
Homes Tested by the EPA
5,076
At or Above Reference Level
17.6%of homes tested
Highest Reading in Co. Mayo
6,200Bq/m³, 31× the Reference Level
Measured Homes by Radon Band
- Below 200 Bq/m³ (below the Reference Level)4,181
- 200–799 Bq/m³ (above the Reference Level)818
- 800+ Bq/m³ (4× the Reference Level or more)77
Source: Radon results by county, EPA measurements to 31 Dec 2019 (EPA (Environmental Protection Agency)). Homes that tested are a self-selected sample (testing was promoted hardest in high-radon areas), so these percentages overstate county-wide prevalence. Nationally, the EPA's 2022 radon risk map predicts 170,000 Irish homes above the Reference Level, and a High Radon Area is anywhere more than 1 home in 10 is predicted to exceed it.
This is the county picture. The report checks your exact address.
Enter the Eircode of any Co. Mayo property.
18
Official Risk Checks
12
Government Data Sources
60s
Average Snapshot Time
26
Counties Covered
What We Check
Every Mayo property, 18 checks.
Flood Risk
Environmental
02Radon Gas
Environmental
03Planning History
Development
04BER Rating
Energy
05Soil Stability
Structural
06Water Quality
Environmental
07Crime Statistics
Safety
08School Catchment
Amenities
09Noise Levels
Environmental
10Conservation Areas
Legal
11Industrial Proximity
Environmental
12EV Charging Network
Infrastructure
Plus more checks across insurance, neighbourhood and transport. See them all on the sample report.

Due Diligence
Know the risks before you sign in Mayo.
Check radon risk for any property in Mayo. Free snapshot, 18 checks from 12 official sources. No card, no account.
Frequently Asked Questions
Radon Risk in Mayo: FAQs
What does a PropertyPack report cover for Mayo properties?
A PropertyPack report for any Mayo address covers 18 risk categories: flood risk (OPW data), radon levels (EPA data), BER ratings (SEAI), property prices (Property Price Register), crime statistics (CSO), school catchment, broadband speeds, planning applications, air quality, noise levels, and more. Each check runs for the Eircode you enter, with the data's confidence level labelled where a source is only published at county or division level.
How much does a property report for Mayo cost?
The full 18-check PDF report for any Mayo address costs €29. House-hunting across several properties? A 3-report bundle is €59 and a 5-report bundle is €79. You see a free snapshot first, no card needed.
Is radon a problem in Mayo?
In EPA measurements to end-2019, 17.6% of homes tested in Mayo were at or above the Reference Level of 200 Bq/m³, above the national share of 14.1% of homes tested. Homes in known high-radon areas were more likely to test, so this is a share of homes tested, not of all homes. Radon is Ireland's second biggest cause of lung cancer, and the EPA recommends testing any home regardless of area.
How do I check radon levels at a Mayo address?
PropertyPack includes EPA radon zone classification for any Eircode in Mayo. For definitive measurement, a physical radon test using detectors placed in the property for 3+ months is recommended. PropertyPack data tells you whether your area is classified as high-risk before you invest in testing.
Which areas of Mayo have the lowest property risk?
Risk levels vary across Mayo depending on which factor you're considering. Properties away from Moy, Erriff and Robe flood plains have lower flood risk. For radon, 17.6% of homes tested in Mayo measured over the Reference Level. The EPA's map shows which areas are classified as High Radon Areas. Well-established residential areas in Castlebar, Ballina, Westport tend to have better broadband, lower crime, and closer school access. PropertyPack helps you compare specific locations within Mayo across 18 risk categories.
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