What happened to your codes.
Every response, property and ignition code was renumbered for 2027. Some were deleted and have no replacement, which is the part that breaks a five-year trend line. Look up a code you already use and see what became of it.
Response type
What the department was called to. Every response code was renumbered for 2027, and twenty were dropped outright.
- new number only
- 51new number only
- changed meaning
- 12changed meaning
- new in 2027
- 28new in 2027
- deleted
- 20deleted
Property type
What kind of property it was. Renumbered and re-sorted into the occupancy groups a building official would recognise.
- new number only
- 278new number only
- changed meaning
- 59changed meaning
- new in 2027
- 56new in 2027
- deleted
- 17deleted
Ignition source
What started it. Renumbered, with new sources added; none were deleted.
- new number only
- 80new number only
- changed meaning
- 3changed meaning
- new in 2027
- 23new in 2027
- deleted
- 0deleted
The other deletions
51 codes were deleted for 2027 in all. 37 of them are in the three tables above, which are the only ones the OFM published a crosswalk for. The rest are below, along with 4 fields that no longer exist on the form at all. Nothing replaces them: if your history uses one, the history is what changes.
SIR form
FUEL OF IGNITION SOURCE
- 4Electricity
SIR form
OBJECT/MATERIAL FIRST IGNITED
- 48Multiple Objects or Materials
- 96Multiple diverse objects ignited
SIR form
VEHICLE FUEL
- 4ElectricityReplaced with two new codes.
SIR form
AGE OF STRUCTURE
- 6After 2010
SIR form
SMOKE ALARM ON FLOOR/SUITE: TYPE
- 3Wireless
SIR form
SMOKE ALARMS ON EVERY LEVEL
- 2No, alarms present on every level, not all operational
- 3No, alarms not present on every level
- 4No alarms present
SIR form
IMPACT OF SMOKE ALARM OPERATION Number of persons at risk who self evacuated due to smoke alarm
- 9898 persons or more
SIR form
FIRE ALARM SYSTEM PRESENCE
- 1Fire alarm system present
INJURY form
STATUS
- 2Occupant (Civ)
- 3Non-Occupant (Civ)
INJURY form
LOCATION WHERE INJURED
- 6Location Injury Location FF: not a fire incident or not applicable
Fields removed from the form
- Aid to/from Other Fire Department
- Under Control Date
- Under Control Time
- Children Rescued
- Adults Rescued
- Seniors Rescued
- Physical Condition of Persons Rescued
- Civilian Action – Reasons for Not Evacuating
Unofficial. Built from the OFM’s 2027 developer pack — Technical Requirements dated 2025-11-13. Confirm anything you are about to act on with OFMstatistics@ontario.ca.
Bring your ten most-used codes to a call.
We will tell you which of them survive 2027, which changed meaning, and which stop your trend line — while you are on the phone. Thirty minutes.