Air Quality Data
Algoma Steel Inc. monitors local air quality through a network of ambient air quality monitoring stations which are operated and maintained by a third party.
Click on this link to view a map of the locations.
Three stations located on Bonney Street, West and Cathcart Street and 4th Avenue monitor for a multitude of parameters on a continuous and non-continuous basis. A summary of the non-continuous monitoring results is provided in quarterly reports which are available on the Algoma website. The air quality parameters monitored continuously are summarized below and include the following:
Total Reduced Sulphur (TRS)
The Ministry of Environment, Conservation and Parks ambient air quality criterion for TRS is 7 micrograms per cubic metre (5 parts per billion) for a 24 hour period and 13 micrograms per cubic metre for a 10 minute period (10 parts per billion).
Sulphur Dioxide (SO2)
The Ministry of Environment, Conservation and Parks ambient air quality criterion for SO2 is 275 micrograms per cubic metre for a 24 hour period and 690 micrograms per cubic metre for a 1 hour period.
Particulate Matter smaller than 10 microns and 2.5 microns in diameter (PM10 and PM2.5)
The Ministry of Environment, Conservation, and Parks standard for Total Suspended Particulate less than 44 microns in diameter is 120 micrograms per cubic meter. The adopted Ministry of Environment, Conservation, and Parks interim ambient air quality criterion for PM10 is 50 micrograms per cubic meter for a 24-hour period, which is based on a Canada Wide Standard. There is no regulated criterion in Ontario for PM2.5, however the Canadian Ambient Air Quality Standards have an air shed management guideline for PM2.5 of 27 micrograms per cubic meter based on the 3-year average of the annual 98th percentile of the daily 24-hour average concentrations.
The following tables show the current data:
| Local Air Quality Information | |||
|---|---|---|---|
| Sensor Location | Parameter | Units | Value |
| 71083 West and Cathcart Street | SO2 | ppb | 4.4 |
| 71083 West and Cathcart Street | TRS | ppb | 2 |
| 71083 West and Cathcart Street | PM10 | ug/m3S | 28 |
| 71083 West and Cathcart Street | PM2.5 | ug/m3 | 15.5 |
| 71082 4th Avenue | SO2 | ppb | 2.3 |
| 71082 4th Avenue | TRS | ppb | 5 |
| 71082 4th Avenue | PM10 | ug/m3S | 18 |
| 71082 4th Avenue | PM2.5 | ug/m3 | 12.3 |
| 71042 Bonney Street | SO2 | ppb | 0.3 |
| 71042 Bonney Street | TRS | ppb | 1 |
| 71042 Bonney Street | PM10 | ug/m3S | 22 |
| 71042 Bonney Street | PM2.5 | ug/m3 | 9.5 |
| Page last updated at 8:00 PM on Tuesday, July 1, 2025 (3) | |||
| Local Meteorological Information | |||
|---|---|---|---|
| Sensor Location | Parameter | Units | Value |
| 71042 Bonney Street | Wind Speed | km/hr | 1.3 |
| 71042 Bonney Street | Wind Direction | Deg | 294.7 |
| 71042 Bonney Street | Ambient Temperature | C° | 21.6 |
| 71042 Bonney Street | Relative Humidity | % | 66.8 |
| 71042 Bonney Street | Barometric Pressure | mb | 988 |
| 71042 Bonney Street | Rain | in | 0.0 |
| Page last updated at 8:00 PM on Tuesday, July 1, 2025(3) | |||
Notes:
- PM10 average is based on a 24-hour rolling average period.
- Wind speed and direction provide a vector mean of all the instantaneous samples of wind direction and wind speed sampled each hour. The direction refers to the degrees that the wind is blowing from with 0 being from due north and 180 being due south.
- Data is presented in Local Standard Time. This means that data may appear with a one hour offset timestamp during Daylight Time.
- Click a value in a table to view the past 7-days of data.