Source of Pesticides: The term "pesticide" includes all chemicals that are used to kill or control pests. This includes herbicides (weeds), insecticides (insects), fungicides (fungi), nematicides (n...
Source of Uranium: Uranium (U) is a naturally occurring radioactive metallic element. Small amounts of uranium are present in certain types of soils and rocks, especially granite. Uranium brea...
Water Hardness
Source of Water Hardness: The definition of water hardness is the amount of dissolved calcium and magnesium in the water. Hard water is high in dissolved minerals, both calcium...
Selenium
Source of Selenium: Selenium is a natural mineral found in the earth’s crust. Selenium also comes from natural run-off, industrial wastewater from copper and lead refinerie...
Source of Sulfate: Sulfate (SO4) occurs naturally in most groundwater sources. As water moves through soil and rock formations that contain sulfate minerals, some of the sulfate dissolves into the g...
Source of Ammonia: Ammonia (and ammonium), are naturally occurring in nature and are formed during decomposition of proteins, manure wastes, urine, and from other nitrogen-containing compounds. Ammo...