Organic Chemicals include Synthetic and Volatile organic chemicals from byproducts of industrial processes and petroleum production gas stations, urban storm water runoff, and septic systems.
Inorganic Contaminants are salts and metals, which can be naturally-occurring or result from urban storm water runoff, industrial domestic wastewater discharges, oil and gas production, mining, or farming.
Radioactive Contaminants which can be naturally occurring or be the result of oil and gas production or mining activities.
Microbial Contaminants such as viruses and bacteria, which may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife.
