Public Lab Wiki documentation

Hydrogen Sulfide

This is the organizing page for research related to hydrogen sulfide in Public Lab.

What is hydrogen sulfide, what are its effects, and where is it found?

Hydrogen sulfide, with the chemical formula H2S, is a flammable gas that has a pungent odor at low concentrations and is odorless at higher concentrations. It can be a respiratory irritant and a neurotoxin. Read more about hydrogen sulfide health effects.

Hydrogen sulfide is naturally formed in low-oxygen conditions with sulfate present, such as in organic-rich sediments and thus in petrochemical source rocks. Upon exposure to oxygen, hydrogen sulfide readily oxidizes to sulfur dioxide or sulfate, and generally reacts within hours to days. Read more about hydrogen sulfide sources and spatial and temporal variation

How are hydrogen sulfide emissions and exposures regulated?

In the United States, hydrogen sulfide emissions are only federally regulated to the extent that they contribute to sulfur dioxide formation, and thus acid rain. These emissions are regulated through the Prevention of Significant Deterioration of major stationary sources review and permitting. Exposure to hydrogen sulfide is mostly regulated in terms of occupational exposure, with very few states regulating ambient exposure to this toxin. Read more about hydrogen sulfide regulations

How can hydrogen sulfide be measured?

While there is no federal regulatory method for hydrogen sulfide in the US, labs, agencies, and oilfield workers often measure hydrogen sulfide gas through several different means:

  • badges or glass tubes that change color
  • continuously sampling electronic sensors, some worn by oilfield workers
  • air grab sampling, as by the Bucket Brigades, tested with gas chromatography

We're compiling information about the pros, cons, prices, and sensitivity/limitations of these techniques: What are different commercially available hydrogen sulfide detection methods?

Do-It-Yourself approaches to detection

There are three prototype, low-cost hydrogen sulfide detection methods currently being explored by Public Lab community members. These include:

Help out! Please help link the above bullet points to corresponding pages across this site.


We can't make progress on these techniques and resources without addressing our unknowns. Please ask questions to help shape the direction of our work!

Title Author Updated Likes
Is there more information on the "Corrosion Coupon" hydrogen sulfide test kit? @warren about 1 month ago
What lab tests are available for hydrogen sulfide, and how much do they cost? @warren about 1 month ago
What are different commercially available hydrogen sulfide detection methods? @warren 3 months ago
Does your state have air quality standards for hydrogen sulfide? @gretchengehrke 3 months ago
Are there occupational exposure rules limiting exposure to hydrogen sulfide? @gretchengehrke 3 months ago
Are there air quality standards for hydrogen sulfide? @gretchengehrke 3 months ago
How to select a site for hydrogen sulfide testing? @warren 3 months ago
How can we safely try out and evaluate a hydrogen sulfide test? @warren 3 months ago
What's the best setup for a copper rod or copper plate test for DIY hydrogen sulfide detection? @warren 3 months ago
Can we determine hydrogen sulfide concentration, or a threshold presence/absence using the copper pipe method? @gretchengehrke 3 months ago
Show 4 more
What is the hydrogen sulfide concentration range that can be monitored using a copper tarnish method? @gretchengehrke 3 months ago
Effective low-cost water filters to remove hydrogen sulfide? @gretchengehrke 4 months ago
What methods are available for doing air grab samples for hydrogen sulfide? @stevie 4 months ago
What are the relative rates of hydrogen sulfide oxidation in ambient air? @gretchengehrke 5 months ago

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Related pages

See other related wiki pages here


These activities are to guide you to test out hydrogen sulfide detection methods or use these tools in the field:

Purpose Category Status Author Time Difficulty Replications
Copper Sheet Hydrogen Sulfide Detection Activity test-limits draft @gretchengehrke 1h easy 0 replications: Try it »
Hydrogen Sulfide Testing With Black and White Film - - @jschaffr - - 3 replications: Try it »

Add an activity  or request an activity

Activities should include a materials list, costs and a step-by-step guide to construction with photos. Learn what makes a good activity here.

Where can I find more information?

Two particularly good resources are listed below. Other hydrogen sulfide wiki pages (mentioned above) include additional relevant resources.

  1. Agency for Toxic Substance and Disease Registry. 2016. Hydrogen Sulfide Fact Sheet.

  2. National Research Council. 2010. Acute Exposure Guidelines.

arduino hydrogen-sulfide h2s h2s-sites