Hydrogen Sulfide Monitoring
H₂S exposure assessment in oil & gas, wastewater, and mining operations
What Is Hydrogen Sulfide Monitoring?
Hydrogen sulfide (H₂S) monitoring measures worker exposure to this colourless, highly toxic gas with a characteristic rotten-egg odour. H₂S is immediately dangerous to life at 100 ppm and causes olfactory paralysis above 100-150 ppm — meaning workers lose the ability to smell the gas at dangerous concentrations.
The WES is 10 ppm TWA-8h with a 15 ppm STEL, and the WEL list that takes effect on 1 December 2026 keeps both values. H₂S exposure is common in oil and gas production, wastewater treatment, geothermal operations, and confined spaces in mining and manufacturing.
How Is It Done?
Personal and area sampling via electrochemical direct-reading instruments (continuous monitoring preferred). Sorbent tube sampling for TWA assessment (NIOSH 6013).
When You Need This
- +Oil and gas production, processing, and drilling operations
- +Wastewater treatment and sewer maintenance
- +Geothermal energy facilities
- +Confined space entry where H₂S may accumulate
- +Mining operations encountering sulfide-bearing ore
Relevant Standards
Common Industries
Related Monitoring
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