Total Reduced Sulphur Compounds (TRS)
What are total reduced sulphur compounds?
TRS compounds produce offensive odours similar to rotten eggs or cabbage.
What are the sources of TRS?
Industrial sources of TRS include the steel industry, pulp and paper mills, refineries and sewage treatment facilities. Natural sources include swamps, bogs and marshes.
What are the effects of TRS?
TRS compounds are not normally considered a health hazard. They are, however, a primary cause of odours.
The following table shows the health effects of different Air Quality Index (AQI) levels caused by total reduced sulphur compounds.
Health effects of different Air Quality Index (AQI) levels caused by total reduced sulphur compounds
|
||
| Category | AQI | Total Reduced Sulphur (TRS) Compounds |
|---|---|---|
 Very Good |
0 - 15 | No health effects are expected in healthy people. |
 Good |
16 - 31 | Slight odour. |
 Moderate |
32 - 49 | Odour. |
 Poor |
50 - 99 | Strong odour. |
 Very Poor |
100 or over | Severe odour; some people may experience nausea and headaches. |
