Guide for radon mitigation companies · checked 11 November 2026
Radon mitigation software for system tags, retests and state reports
A radon job is not done when the fan turns on. The post-mitigation test has to run no sooner than 24 hours and within 30 days, Pennsylvania wants the address, the price you charged and the result within 45 days of fan activation, Minnesota wants a $75 state tag stuck next to the pressure gauge on the day you finish, and the label tells the owner to retest every two years. This guide covers how the work runs, the rules by state, the exhaust measurements, and what to look for in software.
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Short answer
Most radon mitigation companies run on general home service software such as QuoteIQ, Jobber or Housecall Pro for quotes, scheduling and invoices, plus the report software that comes with their continuous radon monitor (Airthings Corentium Pro, Ecosense RadonEye Pro) and a state portal for licensing and reporting. The deciding features are the post-mitigation test window, state system tags and reports (Minnesota, Illinois, Pennsylvania, New Jersey), startup manometer readings, and the two-year retest reminder. Fieldproxy is one option. Best for processes that don't fit a template, set up for you: it is built around your states, tags, tests and real estate deadlines.
4 pCi/L
EPA's level to fix a home; consider fixing between 2 and 4 pCi/L
source: US EPA, The EPA Map of Radon Zones (fix at 4 pCi/L, consider 2 to 4 pCi/L)
24 h to 30 days
Window for the first post-mitigation test after the system is operational (ANSI/AARST SGM-SF; also 25 Pa. Code 240.310)
source: ANSI/AARST SGM-SF 2017 (with 12/20 revisions), Section 9 Radon post-mitigation
45 days
Pennsylvania deadline to report each mitigation to DEP after initial fan activation, including the cost to the client
source: 25 Pa. Code s. 240.303, Reporting of information (Cornell LII)
$75 per tag
Minnesota Department of Health radon mitigation system tag, required on every system a professional installs
source: Minnesota Statutes s. 144.4961, Minnesota Radon Licensing Act
How a job runs
One radon mitigation job, from first call to paid
The order the work really happens in, and what has to be written down at each step so nothing is argued about later.
- 1
Take the call with the test result
Most calls start with a number: a home inspector's short-term test in a sale, a do-it-yourself kit, a school district result or a lender's multifamily test. EPA's guide says to fix at 4 pCi/L or more and that a first short-term result over twice that (8 pCi/L) justifies a second short-term test rather than a long one. The office needs the result, who tested, the device, the test dates, the closing date if it is a sale, and the state, because the state decides the license, the tag and the report.
- 2
Check who may test and who may mitigate
In Illinois a mitigator who is also licensed to measure may not do the measurement before or after the system at the same address unless an independent person measures too. ANSI/AARST SGM-SF says the installer must recommend independent post-mitigation testing to avoid a conflict of interest. Sales jobs often have the buyer's inspector, the seller and an escrow holdback in the middle, so the job record needs every party.
- 3
Inspect the building and run diagnostics
Pennsylvania requires a thorough visual inspection before any mitigation work. Diagnostic mitigators map hot spots and run pressure field extension (PFE) tests: drill test holes at distances from a planned suction point and read the sub-slab pressure with a micromanometer to see whether one suction point reaches the whole slab, or whether a second point, sump lid or crawl space membrane is needed. The 2023 ANSI/AARST revision requires diagnostics such as PFE before installation in buildings other than single family homes.
- 4
Quote the system
The quote names the foundation types (basement slab, slab on grade, crawl space, block walls), suction points, pipe route, fan location, exhaust location and sealing. EPA's guide put the average contractor fix at about $1,200, ranging from about $800 to about $2,500, and much less where a passive system was already built in. Sale jobs usually need the quote in days so it can go into the repair request or escrow.
- 5
Install to the exhaust and fan rules
Pennsylvania's rule is typical: the discharge is vertical and upward, no rain caps, at least 10 feet above the ground nearest it, at least 10 feet from an operable window or door unless 2 feet above it, and at least 12 inches above a roof it penetrates. The fan may not sit below grade, in a window well, in conditioned space, or in a basement or crawl space under living space. Seal floor wall cracks, control joints, utility penetrations and sump pits, with backer rod in gaps wider than half an inch.
- 6
Record startup, label and tag
Record the suction on the main riser at activation, since SGM-SF requires that reading and the information package must list the startup pressure gauge readings. Pennsylvania wants a label legible at 3 feet with the certified name and number, phone, install date and "Building should be tested for radon at least every two years", plus "Radon Reduction System" on each floor. Minnesota requires a post-mitigation checklist on the MDH form before the licensed professional attaches the state tag next to the pressure gauge on the day the project is completed.
- 7
Run the post-mitigation test
A short-term test no sooner than 24 hours after the system is operational and within 30 days of installation. In Pennsylvania it lasts at least 48 hours, the system runs the whole time, closed-building conditions start at least 12 hours before tests shorter than 96 hours, and a test may not be used if it ran on a temporary system. A continuous radon monitor needs 44 contiguous hours of usable data in a 48 hour test, and the client gets the hourly printout.
- 8
Report to the state and the client
Pennsylvania testers give the client the Department-approved Result Report Form within 10 business days, with each result rounded to one decimal place, and the mitigator reports the job to DEP within 45 days of fan activation with the cost to the client and the post-mitigation result. Minnesota reports go in through the state licensing system each quarter (30 January, 30 April, 30 July, 30 October) under the company license.
- 9
Bill, then keep the system on a two-year clock
Invoice the owner, the seller or the escrow agent. Then the long tail: SGM-SF tells the owner to check the fan monitor monthly and retest at least every two years, and Illinois requires mitigation records to be kept at least 5 years or as long as any warranty, whichever is longer. Fan replacements on a pre-2023 system now bring the exhaust and fan location up to the 2023 standard.
What to record
The fields every radon mitigation job should capture
Before the quote
- Pre-mitigation result in pCi/L, device type and serial, test start and stop, who tested, and whether it was a real estate test with anti-tampering
- State and license path (Minnesota tag state, Illinois IEMA license, Pennsylvania DEP certification, New Jersey DEP certification), closing date and escrow holder
- Foundation zones: basement slab, slab on grade, crawl space, block walls, sump, French drain, with sq ft per zone
- Diagnostics: hot spot readings, PFE test hole locations, distance from suction point, sub-slab pressure readings, building and weather conditions
The installed system
- Suction points, pipe size and route, fan make and model, fan location (attic, garage, exterior) and why it is allowed
- Exhaust: height above nearest grade, distance to each operable window or door, height above the roof, no rain cap, photos with a tape in frame
- Sealing done (floor wall joint, control joints, penetrations, sump lid), any perimeter drain left open and the three written statements given
- Startup riser suction (manometer reading), fan monitor type, label photo, state tag number and the date it was attached
Proof it worked
- Post-mitigation test start (at least 24 hours after activation, within 30 days), duration, device, placement, closed-building conditions confirmed
- Result in pCi/L to one decimal, who tested (independent or in-house), report sent date
- State report: Pennsylvania DEP within 45 days with cost to client; Minnesota quarterly; Illinois report with tag number
- Retest due date (two years), warranty end date, records retention date
Rules and standards
The rules that shape the work, with their sources
| Rule | What it means on the job |
|---|---|
| EPA action level: 4 pCi/L, consider 2 to 4 | EPA says fix the home at 4 picocuries per liter (150 Bq/m3) or higher and consider fixing between 2 and 4 pCi/L (75 to 150 Bq/m3). The Map of Radon Zones should not be used to decide whether an individual home needs a test. source: US EPA, The EPA Map of Radon Zones (fix at 4 pCi/L, consider 2 to 4 pCi/L) |
| EPA: retest after mitigation and every two years | EPA's Citizen's Guide estimates about 21,000 lung cancer deaths a year from radon, says most homes can be reduced to 2 pCi/L or below, and tells owners with a reduction system to retest every two years. source: US EPA, A Citizen's Guide to Radon (EPA 402/K-12/002), copy hosted by Kossuth County, Iowa |
| ANSI/AARST SGM-SF: post-mitigation test window | A short-term radon measurement no sooner than 24 hours after the system is operational and within 30 days after installation. The installer records the suction in the main riser at activation, and must recommend that an independent qualified measurement professional runs the test. source: ANSI/AARST SGM-SF 2017 (with 12/20 revisions), Section 9 Radon post-mitigation |
| SGM-SF: when the owner never tests | If the client refuses access or test reports, or 3 months of reasonable outreach get no response, the contractor forwards a radon test kit to the property in care of the occupant, analyzed by an NRPP, NRSB or state listed laboratory. source: ANSI/AARST SGM-SF 2017 (with 12/20 revisions), Section 9 Radon post-mitigation |
| SGM-SF: the Radon Mitigation Information package | Attached to the system or given to the client: a recommendation to retest at least every 2 years, a description of the fan monitor with a recommendation to check it monthly, the startup pressure gauge readings, what to do if the monitor shows failure, a system layout, any deviations from the standard, and the responsible mitigation professional's contact details. source: ANSI/AARST SGM-SF 2017 (with 12/20 revisions), Sections 9.2.4 to 10.1 Documentation and OM&M |
| ANSI/AARST 2023 revisions | Work on systems installed before 2023, including fan replacement, now requires non-compliant exhausts and fan locations to be fixed. Section 9 requires at least one PFE performance check measurement when installation is complete. Diagnostics such as PFE are required before installation except in single family dwellings. source: AARST Consortium on National Standards, SGM 2023 Technical Bulletin and SGM-MFLB 2023 text (Section 6.4 ASD exhaust discharge) |
| SGM-MFLB 2023 exhaust geometry | Distances are measured with a stretched string. The exhaust is at least 10 feet above the nearest grade, at least 10 feet horizontally from operable openings and 4 feet from openings below it, directed upward within 45 degrees of vertical and never downward, and a 45 degree spread cone may not hit openings or places people gather within 10 feet. source: AARST Consortium on National Standards, SGM 2023 Technical Bulletin and SGM-MFLB 2023 text (Section 6.4 ASD exhaust discharge) |
| Pennsylvania: exhaust, fan location, sealing and labels (25 Pa. Code 240.308) | Vertical upward discharge, no rain caps, 10 feet above ground, 10 feet from openings unless 2 feet above them, 12 inches above a penetrated roof, 5 feet from a wall that rises above the roof. No fan below grade, in conditioned space or under living space. A label legible at 3 feet with the certification number and install date, and an information package with contracts, warranties and a 2-year retest recommendation. source: 25 Pa. Code s. 240.308, Radon mitigation standards for residential buildings three stories or less (Cornell LII) |
| Pennsylvania: report every mitigation within 45 days (25 Pa. Code 240.303) | The certified mitigator reports within 45 days of initial fan activation or alteration: certification number, full address with county, activation date, building type, type of installation, the cost to the client and the post-mitigation result. Keep the records 5 years. Each building is tested after mitigation for at least 48 hours, no sooner than 24 hours after completion. source: 25 Pa. Code s. 240.303, Reporting of information (Cornell LII) |
| Pennsylvania: testing protocols and the Result Report Form (25 Pa. Code 240.310) | Devices 20 inches to 6 feet off the floor, 3 feet from exterior doors and windows, 7 feet from sump pits, never in kitchens, bathrooms or within 10 feet of a washer or dryer. Post-mitigation tests run 24 hours to 30 days after activation with the system on throughout. Real estate tests need anti-tampering devices, a signed non-interference agreement and a posted notice. source: 25 Pa. Code s. 240.310, Testing protocols (Cornell LII) |
| Minnesota: annual license and a state tag on every system (Minn. Stat. 144.4961) | The Minnesota Radon Licensing Act requires an annual license to measure or mitigate for pay ($250 per mitigation professional, $100 per mitigation company, waived for a company with one licensed professional) and an MDH system tag ($75) on every system installed on or after 1 January 2019, attached by a mitigation professional in a visible location. source: Minnesota Statutes s. 144.4961, Minnesota Radon Licensing Act |
| Minnesota: post-mitigation checklist, tag placement and quarterly reports (MDH) | The professional completes the MDH post-mitigation checklist before attaching the tag, inside the building next to the system pressure gauge, on the date of project completion. Measurement and mitigation work is reported through the radon licensing system by 30 January, 30 April, 30 July and 30 October; mitigation work is reported under the company license. source: Minnesota Department of Health, Requirements of radon licensees (reporting, tags, post-mitigation checklist) |
| Industry practice: diagnostics before drilling | Diagnostic mitigators map radon hot spots and run pressure field extension tests with a micromanometer before choosing a suction point, instead of drilling where it is convenient and testing afterward, to confirm suction reaches the whole slab and to size the fan. source: Ecosense, How to design a radon mitigation system using diagnostics (hotspot mapping and PFE) |
| Illinois: licensed professionals, supervision and conflict rules (32 Ill. Adm. Code 422) | Unlicensed people may not mitigate without direct on-site supervision of a licensee. A mitigator licensed to measure may not measure at the same address before or after the installation unless another independent person measures. Records are kept at least 5 years or the length of any warranty. Professional licensees must be in Illinois or within 50 miles of its border, and tags are not issued without proof of insurance. source: Ill. Admin. Code tit. 32, s. 422.70, Conditions of licenses (Cornell LII) |
| Illinois: Radon Mitigation Professional and Technician licenses | A Radon Mitigation Professional is at least 18 with relevant experience (for example 4 years of building design, construction or HVAC) and the USEPA mitigation course or an approved equivalent. A Radon Mitigation Technician works under the general supervision of a Professional after the operators course and exam. source: Ill. Admin. Code tit. 32, s. 422.60, Requirements for issuance or renewal of licenses (Cornell LII) |
| New Jersey: 5-year records for certified mitigation businesses (N.J.A.C. 7:28-27.16) | A certified radon mitigation business keeps, for five years and immediately available to DEP: affiliate forms, radiation safety training, annual certification credentials, calibration certificates for diagnostic devices, radon exposure tracking, its mitigation protocols, and records of all mitigation work including the executed contract. source: N.J. Admin. Code s. 7:28-27.16, Recordkeeping for certified radon businesses (Cornell LII) |
| NRPP certification for mitigators | The Radon Mitigation Specialist (RMS) needs a 16-hour measurement course, a 24-hour mitigation exam-prep course and the exam, renews every two years, and supervises Radon Mitigation Installers in the same company. source: National Radon Proficiency Program (NRPP), Types of certification |
| Multifamily lending: Fannie Mae and Freddie Mac (2023) | FHFA's January 2023 change for loan applications after 30 June 2023 raised required testing from 10% to 25% of ground floor units and required an environmental professional to oversee testing and notify tenants. Lender rules have changed since, so check the current guide for each loan. source: NAHB, 19 Jan 2023: Updated radon standards for Fannie Mae and Freddie Mac multifamily properties |
Rules vary by state, council and contract. Checked 11 November 2026; confirm against the source for your area before relying on it.
Numbers
The numbers that decide a radon job's paperwork
In this trade the measurements and dates matter more than price: they decide whether the system passes, whether the state is told in time, and when the owner comes back.
| Rule | Figure | Where |
|---|---|---|
| Fix the home | 4 pCi/L or more; consider 2 to 4 | EPA radon zones page |
| Typical contractor fix (EPA guide) | About $1,200, range about $800 to $2,500 | EPA Citizen's Guide |
| First post-mitigation test | No sooner than 24 h, within 30 days | SGM-SF 9.2; 25 Pa. Code 240.310 |
| Pennsylvania post-mitigation test length | At least 48 hours | 25 Pa. Code 240.303 |
| CRM test (Pennsylvania) | 48 hours with 44 contiguous usable hours | 25 Pa. Code 240.310 |
| Closed-building conditions before tests under 96 h | At least 12 hours | 25 Pa. Code 240.310 |
| Pennsylvania report to DEP | Within 45 days of fan activation | 25 Pa. Code 240.303 |
| Pennsylvania Result Report Form to client | Within 10 business days | 25 Pa. Code 240.310 |
| Exhaust height above nearest grade | 10 ft or more | 25 Pa. Code 240.308; SGM-MFLB 6.4.5 |
| Exhaust distance from operable openings | 10 ft, or 2 ft above them (PA) | 25 Pa. Code 240.308 |
| Exhaust above a penetrated roof (PA) | 12 in or more | 25 Pa. Code 240.308 |
| Minnesota system tag | $75 per system | Minn. Stat. 144.4961 |
| Retest after mitigation | At least every 2 years | SGM-SF 10.1.1; EPA |
| Records retention | 5 years (PA, NJ); 5 years or warranty length (IL) | PA, NJ, IL rules |
source: US EPA, The EPA Map of Radon Zones (fix at 4 pCi/L, consider 2 to 4 pCi/L)source: US EPA, A Citizen's Guide to Radon (EPA 402/K-12/002), copy hosted by Kossuth County, Iowasource: ANSI/AARST SGM-SF 2017 (with 12/20 revisions), Section 9 Radon post-mitigationsource: 25 Pa. Code s. 240.303, Reporting of information (Cornell LII)source: 25 Pa. Code s. 240.310, Testing protocols (Cornell LII)source: 25 Pa. Code s. 240.308, Radon mitigation standards for residential buildings three stories or less (Cornell LII)source: AARST Consortium on National Standards, SGM 2023 Technical Bulletin and SGM-MFLB 2023 text (Section 6.4 ASD exhaust discharge)source: Minnesota Statutes s. 144.4961, Minnesota Radon Licensing Actsource: ANSI/AARST SGM-SF 2017 (with 12/20 revisions), Sections 9.2.4 to 10.1 Documentation and OM&Msource: N.J. Admin. Code s. 7:28-27.16, Recordkeeping for certified radon businesses (Cornell LII)source: Ill. Admin. Code tit. 32, s. 422.70, Conditions of licenses (Cornell LII)
Where it breaks
Where spreadsheets and generic software fall over
The fan went on Monday. The house sells Friday, the buyer's agent books a 48 hour test for Tuesday morning, and the result can't be used because the system had not run for 24 hours.
Activation date and time live on the job; the test booking refuses a start sooner than 24 hours later and warns when day 30 approaches with no test.
A Pennsylvania office keys DEP reports in a batch at the end of the quarter. Jobs activated in the first month are already past 45 days.
Each job carries its own 45-day DEP clock from fan activation, with the cost to the client and the post-mitigation result already on the record, so the report is ready the day the test comes back.
A Minnesota tech finishes a system on Friday and leaves the tag in the van. The tag number on the quarterly report doesn't match any system.
State tags are inventory issued to a tech by number; the job cannot close without the MDH checklist, the tag number and a photo of it next to the gauge, dated the completion day.
A fan replacement on a 2015 system is quoted as a fan swap. The exhaust is under a bedroom window, which the 2023 standard now requires to be fixed during that work.
Service calls on existing systems open with an exhaust and fan location check; a non-compliant result adds the reroute to the quote before the fan is ordered.
The post-mitigation test comes back 5.1 pCi/L and nobody knows the original riser suction, so there is no way to tell whether the fan is weak or the slab never communicated.
Startup manometer reading and PFE readings by test hole are required fields at activation; a failed retest opens a callback with those readings and the floor plan.
Two years after install the owner has never retested, the fan monitor shows zero, and the only contact is an email from the closing.
Every system gets a retest due date and an owner record that follows the house; a reminder goes out before the two-year mark, and resales update the owner.
Checklist
The radon mitigation operations checklist
Print it, or hand it to whoever runs the office side.
- Pre-mitigation result, device, dates and tester on the job before quoting
- State identified: license, tag and reporting rules attached to the job
- Conflict check: in-house measurement allowed for this address and state
- Visual inspection and diagnostics (hot spots, PFE readings by test hole) recorded
- Quote names suction points, fan location, pipe route and exhaust location
- Exhaust: 10 ft above grade, clear of operable openings, no rain cap, roof clearance met
- Fan outside conditioned space and not under living space
- Cracks, joints, penetrations and sump sealed; drain-left-open statements given if needed
- Startup riser suction and fan monitor recorded
- Label and information package attached; state tag attached with checklist (Minnesota)
- Post-mitigation test started 24 hours to 30 days after activation
- Client report and state report filed on time (PA 10 business days and 45 days, MN quarterly)
- Retest due date set for two years out
- Records kept 5 years or warranty length, whichever is longer
Software options
What software radon mitigation companies actually use
Judge each one on whether it fits the way your jobs run, not on the feature list. Bring a real job to every demo.
QuoteIQ
Small residential radon contractors who want quotes, scheduling, photos and invoices in one app
General home service software with plans from $29.99 a month. It publishes its own ranking of radon software and puts itself first; it says NRPP documentation is managed separately.
Jobber or Housecall Pro
Residential mitigators on real estate and homeowner jobs
Strong on quotes, scheduling, invoices and reviews. Post-mitigation windows, state tags, DEP reports and two-year retests would be custom fields, tags and manual reminders.
Ecosense (RadonEye Pro, EcoGuard)
Mitigators who test with continuous monitors and want to sell post-mitigation monitoring
Device and dashboard maker rather than job software. EcoGuard lets the mitigator leave a Wi-Fi monitor behind and watch the house through the seasons on a subscription.
Airthings Corentium Pro report software
Measurement professionals using Corentium Pro monitors
Desktop software that loads monitor data and builds test reports from templates. It produces the test report, not the job, tag or state report.
State licensing portals
Every licensed mitigator in Minnesota, Pennsylvania, Illinois or New Jersey
Where licenses, tags and job reports are filed. They are the destination for your data, so check that your job software can export the fields each one asks for.
Published prices, compared:source: QuoteIQ, Field service management software for home service contractorssource: Ecosense, EcoGuard post-mitigation radon monitoring service for mitigatorssource: Airthings, Corentium Plus/Pro Report and Analysis Software user guide v4.5source: Minnesota Department of Health, Requirements of radon licensees (reporting, tags, post-mitigation checklist)source: RadonAway, Radon fans, mitigation supplies, RadonAway Labs and Spruce Training
Questions to ask any vendor
- Can it block a post-mitigation test booked sooner than 24 hours after fan activation and warn before day 30?
- Can it hold state tag numbers as inventory, assign them to a tech and stop a Minnesota job closing without the tag and checklist?
- Can it produce the Pennsylvania DEP report fields (certification number, county, activation date, installation type, cost to client, result) within 45 days?
- Does the field app record exhaust measurements, startup manometer readings and PFE readings by test hole, offline in a basement?
- Can a system stay on file after the job closes, with a retest due date that follows the house through a sale?
- Can it hold real estate jobs with the closing date, escrow holder, buyer's inspector and seller on one record?
Bring one real radon mitigation job. We show it running in Fieldproxy.
Get DemoHow Fieldproxy is set up for this
Radon mitigation on Fieldproxy: built around how you already work
A Fieldproxy setup for a radon mitigation company is built around the system as the state and the owner see it: the pre-mitigation number, the diagnostics, the exhaust that has to measure right, the tag, the test window, the state report and the retest in two years. The state rules (Minnesota tags and quarterly reports, Pennsylvania's 45-day report, Illinois conflict and records rules) are built into statuses and blocks, so a job cannot close ahead of its paper.
Module 1
Intake and test result
The number, the state and the closing date decide everything after.
- Records: Customer (owner, buyer, seller, landlord, school district) > Property > System > Job
- Fields: pre-mitigation pCi/L, device type and serial, test start and stop, tester and license number, real estate test yes or no, closing date, escrow holder
- Auto-flags: result at or above 4 pCi/L, 2 to 4 (consider), first short-term over 8 (EPA suggests a second short-term)
- Status: New, Inspection booked, Diagnostics done, Quoted, Approved, Installed, Tagged, Testing, Passed, Reported, Closed, Retest due
Module 2
Site inspection and diagnostics form
The 2023 standard leans on diagnostics, and a failed retest is only fixable if the readings were kept.
- Foundation zones with sq ft: basement slab, slab on grade, crawl space, block walls, sump, French drain
- PFE table: test hole, distance from suction point, sub-slab pressure reading, fan setting, building and weather conditions
- Floor plan sketch with suction points, pipe route, fan and exhaust marked; photos at each hole
Module 3
Quote and approval
Sale jobs need a fast, specific quote the buyer, seller and escrow can all read.
- Quote lines: suction points, pipe footage, fan model, exterior or attic route, sealing, crawl space membrane sq ft, electrical
- Approval by the paying party, with the escrow amount and closing date on the quote PDF from your template
- Rule: existing-system service quotes add an exhaust and fan location check and the reroute line if the 2023 standard is not met
Module 4
Install checklist with exhaust measurements
The exhaust and fan location are where inspections and callbacks start.
- Required fields: exhaust height above nearest grade, distance to each operable window and door, height above roof, rain cap absent, photos with tape in frame
- Fan location picker (attic, garage, exterior) with a block on basement, crawl space or conditioned space
- Sealing checklist (floor wall joint, control joints, penetrations, sump lid) and the three written statements if a perimeter drain stays open (Pennsylvania)
- Startup riser suction, fan monitor type, label photo
Module 5
State tag register
Minnesota and Illinois tags are numbered state items that must end up on one system each.
- Tag inventory by number, state, purchase date and cost ($75 in Minnesota), assigned to a licensed tech
- Job close blocked in Minnesota until the MDH post-mitigation checklist, tag number and tag photo next to the gauge are on file, dated the completion day
- Illinois: insurance certificate and expiry on the company record, since tags are not issued without valid proof of insurance
Module 6
Post-mitigation test scheduler
The test has a hard window and a protocol, and the result is what the buyer is waiting for.
- Activation timestamp on the system; test start earlier than 24 hours later is refused; alert at day 25 if no test booked
- Test record: device, placement, closed-building conditions from 12 hours before, start and end, independent or in-house tester
- Illinois conflict rule: in-house measurement at the same address blocked unless an independent measurement is also on file
- Result to one decimal; a result at or above 4 pCi/L opens a callback job with the startup and PFE readings attached
Module 7
State reports and records
Each state wants different fields on a different clock.
- Pennsylvania: DEP report due 45 days from activation with certification number, county, building type, installation type, cost to client and result; Result Report Form to the client within 10 business days
- Minnesota: quarterly export under the company license by 30 January, 30 April, 30 July and 30 October
- Retention date on every job: 5 years, or the warranty length if longer (Illinois)
Module 8
Crew licenses and certifications
Who may install, supervise, test and tag differs by state and by credential.
- Per person: NRPP RMS, RMI or measurement credential with expiry, CE hours, state license numbers (IL professional or technician, MN mitigation professional, PA, NJ)
- Rule: an RMI or Illinois technician job needs a supervising RMS or professional on the job record
- Expiry alerts before renewal, including the 4-hour standards course NRPP now requires
Module 9
Systems, retests and the owner portal
The system outlives the job and usually the owner.
- System record: install date, fan model, startup suction, tag number, warranty end, retest due (2 years), last fan monitor report
- Portal per owner or property manager: test results, information package, label and tag photos, warranty and invoice
- Sale of the house updates the owner and restarts the reminders; QuickBooks or Xero sync for invoices
The AI agents, set up for radon mitigation companies
| Agent | When | What it does | What you get |
|---|---|---|---|
| Document intelligence agent | A home inspector's radon report or lab result PDF arrives by email with a repair request | Reads the address, result in pCi/L, device, test dates, tester and closing date | A new job with the pre-mitigation result filled and a flag if the result is under 4 pCi/L |
| Watcher agent | A post-mitigation test is booked under 24 hours from activation, day 25 passes with no test, a Pennsylvania DEP report nears 45 days, or a Minnesota job tries to close without a tag | Checks the job against the state and ANSI/AARST rules on file | A blocked booking or close with the reason, and an alert to the office manager |
| Vision agent | The tech photographs the exhaust with a tape, the U-tube manometer and the state tag | Reads the measured distances, the manometer reading and the tag number | Exhaust, startup suction and tag fields filled on the install checklist |
| Autopilot | A system's two-year retest date is e.g. 30 days away, or a post-mitigation report has not been sent to the buyer's agent e.g. 1 day after the result | Drafts the retest offer to the current owner, or the result email with the report attached | A draft a person approves before it sends |
| Scheduler agent | Every Monday at 7 am | Lists systems awaiting their post-mitigation test, failed retests, DEP reports due, tags in vans, closings this week and certifications expiring | A weekly briefing emailed to the owner and office manager |
Straight answers
Radon mitigation: FAQ
What software do radon mitigation companies use?
Most use general home service software such as QuoteIQ, Jobber or Housecall Pro for quotes, scheduling and invoices, the report software from their continuous radon monitor maker (Airthings, Ecosense) for test reports, and state portals for licensing and reporting. What matters is tracking the post-mitigation test window, state tags and reports, startup readings and the two-year retest. Fieldproxy is set up around your own states, tags and tests.
How soon after installing a radon system can you test?
No sooner than 24 hours after the system is operational, and within 30 days of installation, under ANSI/AARST SGM-SF. Pennsylvania writes the same window into 25 Pa. Code 240.310 and requires at least a 48 hour test with the system running the whole time.
Can a radon mitigator do the post-mitigation test?
Under ANSI/AARST SGM-SF the installer may test if qualified and allowed locally, but must recommend an independent qualified measurement professional. In Illinois, a mitigator licensed to measure may not measure at the same address before or after the installation unless another independent person measures too.
What is a radon system tag?
A numbered state label on the system. Minnesota requires an MDH tag, $75 each, on every system a professional installs since 1 January 2019, attached next to the pressure gauge on the completion date after the MDH post-mitigation checklist. Illinois will not issue its mitigation system tags without valid proof of the mitigator's liability insurance.
Where can a radon fan exhaust be located?
In Pennsylvania: vertical and upward with no rain cap, at least 10 feet above the nearest ground, 10 feet from operable windows and doors unless 2 feet above them, and 12 inches above a roof it penetrates. ANSI/AARST 2023 measures distances with a stretched string and bars any downward exhaust.
Does a radon mitigator have to report jobs to the state?
In some states. Pennsylvania requires each mitigation to be reported to DEP within 45 days of initial fan activation, including the cost to the client and the post-mitigation result. Minnesota reports go through its licensing system quarterly, under the company license.
How much does radon mitigation cost?
EPA's Citizen's Guide put the average contractor fix at about $1,200, ranging from about $800 to about $2,500, with much less where a passive system was built in. Crawl spaces, multiple slabs and long exterior pipe runs push a quote up.
How often should a mitigated home be retested?
At least every two years, per EPA and ANSI/AARST SGM-SF, which also asks owners to check the fan monitor monthly. Pennsylvania puts "Building should be tested for radon at least every two years" on the system label.
What changed in the 2023 ANSI/AARST mitigation standards?
Work on systems installed before 2023, including fan replacement, now requires non-compliant exhausts and fan locations to be fixed, and at least one PFE performance check measurement is required after installation. The multifamily and large building standards were merged into SGM-MFLB 2023.
What certification does a radon mitigator need?
Many states accept or require NRPP or NRSB certification. The NRPP Radon Mitigation Specialist takes a 16-hour measurement course, a 24-hour mitigation exam-prep course and the exam, and renews every two years. Illinois, Minnesota, Pennsylvania and New Jersey run their own licenses or certifications on top.
Related guides
All sources on this page (38)
- source: US EPA, The EPA Map of Radon Zones (fix at 4 pCi/L, consider 2 to 4 pCi/L)
- source: ANSI/AARST SGM-SF 2017 (with 12/20 revisions), Section 9 Radon post-mitigation
- source: 25 Pa. Code s. 240.303, Reporting of information (Cornell LII)
- source: Minnesota Statutes s. 144.4961, Minnesota Radon Licensing Act
- source: US EPA, A Citizen's Guide to Radon (EPA 402/K-12/002), copy hosted by Kossuth County, Iowa
- source: ANSI/AARST SGM-SF 2017 (with 12/20 revisions), Sections 9.2.4 to 10.1 Documentation and OM&M
- source: AARST Consortium on National Standards, SGM 2023 Technical Bulletin and SGM-MFLB 2023 text (Section 6.4 ASD exhaust discharge)
- source: 25 Pa. Code s. 240.308, Radon mitigation standards for residential buildings three stories or less (Cornell LII)
- source: 25 Pa. Code s. 240.310, Testing protocols (Cornell LII)
- source: Minnesota Department of Health, Requirements of radon licensees (reporting, tags, post-mitigation checklist)
- source: Ecosense, How to design a radon mitigation system using diagnostics (hotspot mapping and PFE)
- source: Ill. Admin. Code tit. 32, s. 422.70, Conditions of licenses (Cornell LII)
- source: Ill. Admin. Code tit. 32, s. 422.60, Requirements for issuance or renewal of licenses (Cornell LII)
- source: N.J. Admin. Code s. 7:28-27.16, Recordkeeping for certified radon businesses (Cornell LII)
- source: National Radon Proficiency Program (NRPP), Types of certification
- source: NAHB, 19 Jan 2023: Updated radon standards for Fannie Mae and Freddie Mac multifamily properties
- source: QuoteIQ, Field service management software for home service contractors
- source: Ecosense, EcoGuard post-mitigation radon monitoring service for mitigators
- source: Airthings, Corentium Plus/Pro Report and Analysis Software user guide v4.5
- source: RadonAway, Radon fans, mitigation supplies, RadonAway Labs and Spruce Training
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