LibreHow Long Should Radon Mitigation Records Be Kept?
Years, not months — and the exact number depends on where you work and what you warranted.
Start with whichever rule is longest
There is no single US retention rule for mitigation records. Three things set your minimum, and the longest one wins: the professional standard you work under, your state's requirement if it has one, and the length of any warranty you gave. The current national standard, ANSI/AARST SGM-SF-2023, says records of mitigation work are kept for no less than 6 years, or as state regulations require, or for the warranty period — whichever is longest. This is a summary, not legal advice; read the rule that applies to you.
How three states write it
Examples, not a national rule. Each is paraphrased from the state's own text — read the source before you rely on it.
Ohio
Licensed specialists and contractors maintain records of each mitigation project for at least 5 years and make them available to the director of health on request. Ohio's mitigation standard adds "or the period of any warranty, whichever is longer" — and separately says the documentation it requires is kept on file for 20 years as an auditable record. If you work in Ohio, confirm with the Department of Health which period governs your files. OAC 3701-69-08 and its appendix, accessed September 2026.
Pennsylvania
The certified mitigation individual retains the mitigation activity documentation for 5 years. 25 Pa. Code § 240.303, accessed September 2026.
Minnesota
State rules call for records of each mitigation to be maintained for 3 years. Minnesota also adopts the ANSI/AARST standard by reference, so the standard's longer period is part of the picture. Minnesota Rules 4620.7400, accessed September 2026.
Retention isn't useful if you can't find the job
Saving files for six years is one problem. Finding the right property, the right installation, the right technician's photo of the right component — six years later, when the person who did the install may have moved on — is another. A shared drive answers the first and fails the second: folders named by whoever made them, photos named IMG_4032, nothing connecting a picture to an address. In LibreCam every photo is filed under the property at capture, with time and location attached, and search runs across every job by address, date, tag, or the words in a voice caption. A record you can retrieve in a minute is a different thing from one that technically exists.
What a long-lived record needs
Filed by property
One address, one record. Not one folder per technician or per month.
Not on someone's phone
Photos that live in a camera roll leave when the employee does. Every technician's shots should land on the company's job.
Dated at capture
Time and location recorded when the photo is taken, not reconstructed later from memory.
Searchable
Address, date, tag, caption. If finding it takes an afternoon, it won't get found.
Official sources
What belongs in the record is covered in the radon mitigation documentation guide; how LibreCam fits the job is on the radon mitigation page. For the rules themselves: ANSI/AARST SGM-SF-2023 · EPA — state radon contacts. Requirements vary by jurisdiction and can change. LibreCam helps professionals document work; it does not certify code or standards compliance.
Frequently Asked Questions
It depends on your state, your standard, and your warranty. ANSI/AARST SGM-SF-2023 sets a floor of 6 years or longer where a state rule or warranty runs longer. State rules we checked range from 3 to 5 years, and they can change.
In some licensing states, yes. Ohio's rules, for example, require licensees to make mitigation project records available to the director on request.
They can. The national standard lists photographs among the ways jobsite quality-control records can be retained. They complement, rather than replace, the other records you're required to keep.