This H2S Concentration Chart is like a survival radar for toxic gas zones . It shows how different levels of Hydrogen Sulfide (H₂S) mess with your body, from just a little rotten egg smell to instant death . If you’re in any industrial area or gas zone, this chart is your life saver .

H₂S Level (ppm)	Body Effects	Equivalent Example
0.01 - 0.3	Odor Detectable	Rotten Egg Smell
0.3 - 1	Mild Irritation	Faint Odor in Air
2 - 5	Eye/Nose Irritation	Sewage Smell
10	Headache, Nausea	Manure Storage Area
20 - 50	Severe Irritation	Wastewater Treatment Plant
50 - 100	Breathing Difficulty	Industrial Areas
100 - 150	Loss of Smell	High Contaminated Area
200 - 300	Vomiting, Chest Pain	Volcanic Emission
300 - 500	Lung Edema	Extreme Industrial Leakage
500 - 700	Unconscious (30 mins)	Severe Industrial Accident
700 - 1000	Death (Minutes)	Gas Leakage Disaster
>1000	Instant Death	Extreme Industrial Explosion

1. What is H₂S?

H₂S is that rotten egg smell gas found in sewage, industrial leaks, and volcanic areas. It’s invisible but dangerous af if you inhale too much.

2. Smell Detection

When the gas is between 0.01 - 0.3 ppm, you can smell the typical rotten egg smell. That’s like nature’s way of warning you to get out before things get worse .

3. Mild Irritation

At 0.3 - 1 ppm, you’ll feel a little eye or throat irritation with a faint odor. Nothing serious, but bro, don’t chill around too long.

4. Eye & Nose Irritation

If the level hits 2 - 5 ppm, your eyes will burn and your nose will start running like you’re crying in a breakup .

5. Headache & Nausea

Crossing 10 ppm is where the real trouble starts. You’ll get headaches, dizziness, and nausea — like you’re standing near a manure pit .

6. Severe Irritation

Between 20 - 50 ppm, your eyes and throat will be on fire — just like standing in a wastewater treatment plant. Stay here for long, and you’re gonna feel like you’re being cooked alive, bro.

7. Breathing Problems

At 50 - 100 ppm, it’s hard to breathe properly, like someone is choking you. This level is common in industrial areas, and trust me — you don’t wanna hang around.

8. Smell Loss

Here’s the sneaky part, bro — around 100 - 150 ppm, your nose will stop smelling the gas completely. It feels like you’re safe, but that’s how this gas plays with you.

9. Vomiting & Chest Pain

From 200 - 300 ppm, you’ll start vomiting, get chest pain, and your lungs will burn. This level happens near volcanic eruptions or chemical leaks.

10. Lung Edema

Between 300 - 500 ppm, your lungs will fill with liquid (Lung Edema), and you’ll feel like you’re drowning from the inside — no cap .

11. Unconscious (30 mins)

If the gas reaches 500 - 700 ppm, you’ll pass out in 30 minutes or less — like you’re in a severe industrial accident zone.

12. Death (Minutes)

From 700 - 1000 ppm, you’re looking at death in a few minutes — like what happens during a gas leakage disaster.

13. Instant Death

Above 1000 ppm, you’re gone instantly — no time to run, no time to think. This level happens in extreme industrial explosions.

Final Words

Bro, this H₂S Level Chart is not a joke — one wrong step in an industrial area, and you’re playing with death . Always wear your mask and follow safety guidelines. If you smell rotten eggs, RUN!

Stay safe, stay alive!