The dangers of breathing sewer gas are hydrogen sulfide poisoning and asphyxiation, according to the Wisconsin Department of Health Services. Inhaling very high levels of hydrogen sulfide can lead to immediate loss of co... More »

A clogged sewer roof vent causes sewer gas to back up into the house, which has the potential to make residents sick, according to North Dakota State University. Ice, snow and other debris clog these pipes to cause a rot... More »

Sewer gas is harmful to human health because it contains methane gas, which contains a mixture of toxic gases. One of these is hydrogen sulfide, which can affect the functioning of the central nervous system, according t... More » Health Conditions & Diseases

Breathing sewer fumes can make a person sick, according to the Wisconsin Department of Health Services. Sewer gas is a potent mix of several poisonous gases that can cause dizziness, headache, drowsiness and asphyxiation... More »

Some side effects of inhaling sewage gas are dizziness, nausea, headache and loss of consciousness, as stated by the Wisconsin Department of Health Services. The National Association of Certified Home Inspectors, or Inte... More »

Some signs of antifreeze poisoning include rapid breathing, no breathing, decreased urine output or blood in the urine, blindness or blurred vision and low blood pressure, notes the United States National Institutes of H... More » Health Conditions & Diseases states that cyanide poisoning can present symptoms such as headaches, confusion, dizziness, anxiety, nausea and vomiting as well as restlessness, shortness of breath, rapid breathing, chest pain, irregular hear... More »