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
The reasoning behind all of this is written up in what actually changed in the 2027 SIR, and the rest of the series is on the incident reporting page.
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.