Types of Contaminants
1,2,3 Trichloropropane (TCP) is a manmade chemical, a chlorinated hydrocarbon, found at industrial or hazardous waste sites.
Arsenic is a naturally occurring element in the earth’s crust that is widely distributed in the environment.
Fluoride occurs naturally in water supplies and historically was regulated as a contaminant as it is a very common element and at elevated levels over a long period of time can result in a condition known as fluorosis.
Manganese is an element that occurs naturally in water, soil, air and food, and can be found in ground and surface waters. Manganese is one of the most abundant metals in the earth’s crust and is a component of over 250 minerals.
Nitrate is the most-common chemical contaminant in the world’s groundwater aquifers. Nitrate is a regulated drinking water contaminant with an established state and federal Maximum Contaminant Level (MCL) of 10 mg/L (as N). Information on health effects related to nitrate can be found in the resources listed at the bottom of this page.
Perchlorate is a chemical that forms naturally in the atmosphere and occurs naturally in arid states in the Southwest United States. It can also be found in some fertilizers. In manufacturing, perchlorate and its salts are used in solid propellant for rockets, missiles and fireworks, and for the production of matches, flares, pyrotechnics, ordnance and explosives.
Perfluorooctanoic Acid (PFOA) and Perfluorooctane Sulfonate (PFOS) are fluorinated organic chemicals that have been used in the making of domestic products such as carpets, cookware and other products that are resistant to water, grease or stains. PFOA and PFOS have also been used for suppressing fires, primarily at airfields and military bases.
The fourth Unregulated Contaminant Monitoring Rule (UCMR4) was published in the Federal Register by the United States Environmental Protection Agency (USEPA) in December 2016, requiring that all large drinking water systems serving more than 10,000 customers