Can I Sue for H2S Exposure in the Oilfield?
Often, yes. Texas Railroad Commission Statewide Rule 36 requires operators in H2S areas to train workers, post warnings and, at many drilling and workover sites, provide automatic detection and alarms. When monitors are missing, alarms don't work or crews aren't trained, the operator, contractors and equipment makers can be sued. Comp covers your employer unless it's a nonsubscriber.
Every hand in the Permian knows the rotten egg smell. What kills people is that the smell goes away right when the gas gets dangerous. H2S injuries almost always trace back to a monitor that wasn't worn, an alarm that didn't sound or a crew nobody trained. Those are choices, and somebody made them.
Why Hydrogen Sulfide Is So Deadly
Hydrogen sulfide is heavier than air, so it collects in low spots, pump houses, tanks and cellars. OSHA lays out what it does at different concentrations:
You can smell it
The rotten egg odor. Long exposure can bring headaches, nausea and watery eyes.
The smell disappears
H2S paralyzes your sense of smell. You stop noticing it right as it becomes dangerous.
Collapse
Staggering and collapse within about five minutes. Death can follow within an hour.
Knockdown
Unconsciousness within one or two breaths. Breathing stops within minutes.
Survivors of serious exposures can be left with lung damage and lasting problems with memory, balance and concentration. Get evaluated even if you felt fine after you got to fresh air.
What Texas Law Requires
Statewide Rule 36 is the Railroad Commission's H2S rule. Where H2S is present above 100 ppm, it requires:
Training. Operators must train workers in H2S areas, and contractors can only send workers trained to the same standard, certified in writing.
Detection. Drilling and workover sites above the rule's thresholds need automatic H2S detection and alarms, breathing equipment and wind indicators.
Warnings. "Caution Poison Gas" signs on access roads, and fencing at some unattended sites.
A plan. A written contingency plan for releases, kept current, and immediate reporting of accidental releases.
Federal OSHA rules add exposure limits, and industry training standards cover monitors, escape and rescue. A company that ignores these rules has a hard time arguing it acted reasonably.
How H2S Injuries Usually Happen
Who Can Be Held Responsible
Owes most Rule 36 duties: training, detection, signage and contingency planning. Chapter 95 applies, but knowledge of H2S hazards is often well documented.
When an operator is liable ›Service companies that sent untrained hands, opened lines without lockout or ran the safety program on location.
Third party claims ›Makers of monitors, fixed sensors, alarm panels and breathing equipment that failed to work as designed.
Defective equipment claims ›Covered by comp if it carries it. If it's a nonsubscriber, it can be sued directly for failing to train or equip you.
Nonsubscriber employers ›After an H2S Exposure
Personal monitors and fixed sensors store event logs showing peak readings and alarm times. That data is often the best evidence in an H2S case, and it can be cleared or overwritten. See what to do in the first 24 hours.
If someone was killed
H2S deaths often meet the gross negligence standard: a known hazard, a required safeguard and a decision to skip it. That's what allows a spouse and children to bring claims even against a comp covered employer. See wrongful death rights.
What Federal Investigators Found at Aghorn
In October 2019, a pumper at Aghorn Operating's waterflood station in Odessa was killed by H2S after answering a pump alarm. His wife, who came looking for him, was killed too. The U.S. Chemical Safety Board investigated.
In the Truck
His personal H2S monitor was found in his truck, still alarming. The company had no rule requiring workers to wear one.
Not Working
The site's fixed H2S alarm system wasn't functioning, so no beacon or phone alert went out.
Left Open
The gate was unlocked and the warning signs were faded, which let his wife walk into the gas.
More on H2S Exposure
Who is responsible for H2S safety on an oilfield location?
Under Texas Railroad Commission Statewide Rule 36, operators in H2S areas must train workers, post warning signs, keep contingency plans and, at certain drilling and workover sites, provide automatic detection and alarms. Contractors must send only trained workers. Employers and equipment makers can share responsibility too.
Can I sue my employer for H2S exposure?
If your employer carries comp, comp usually covers the exposure and blocks a suit against it, but you can still sue the operator, other contractors and makers of failed monitors or equipment. If your employer is a nonsubscriber, you can sue it directly.
Why didn't I smell the H2S?
At around 100 to 150 ppm, hydrogen sulfide paralyzes your sense of smell, according to OSHA. The rotten egg odor disappears just as the gas becomes dangerous, which is why personal monitors and alarms matter.
Can H2S exposure cause long term health problems?
Yes. Serious exposures can cause fluid in the lungs and lasting effects some survivors report, like memory, balance and concentration problems. Get evaluated even if you felt better after leaving the area, and keep every medical record.
See all of our oilfield injury questions, or read about toxic exposure and chemical burn claims.
OSHA, Hydrogen Sulfide Hazards · Railroad Commission Rule 36, 16 TAC 3.36 · U.S. Chemical Safety Board, Aghorn Operating Investigation
This page is general information about Texas law, not legal advice for your situation. Reading it does not create an attorney client relationship.
You Can't Smell the Danger.
The Law Says They Have to Detect It.
H2S safety is required, not optional. Talk to a Board Certified oilfield injury lawyer who can find out which safeguard failed and who skipped it.