Information – Symptoms of H2S Poisoning by Parts Per Million (ppm)
Here is a handy chart indicating the symptoms associated with various levels of H2S.
O W |
0 – 10 ppm | Irritation of the eyes, nose and throat |
O D |
10 – 50 ppm | Headache Dizziness Nausea and vomiting Coughing and breathing difficulty |
I G H |
50 – 200 ppm | Severe respiratory tract irritation Eye irritation / acute conjunctivitis Shock Convulsions Coma Death in severe cases |
