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La dureté est généralement définie comme la capacité de l’eau à neutraliser le savon, ou l’incapacité de l’eau à former une mousse de savon. L’eau dure est causée par des concentrations élevées de calcium et de magnésium dans l’eau, et peut entraîner la formation de tartres dans...

Arsenic is a naturally occurring element that is widely distributed throughout the Earth’s rocks and soils. Arsenic can be dissolved from arsenic bearing minerals in the soil or rock and be present in groundwater. On a more local basis, arsenic can also be released into water...

Barium is a naturally occurring element that is found in small quantities in a variety of minerals. Varying amounts of barium can be dissolved as water passes through rocks and soils and be present in groundwater. Barium may also be present in the air as a result of industrial...

Iron is a naturally occurring element that is common in PEI rocks and soils. Iron can occur in well water for two reasons; it may be present in fine sediment particles, or it may be present in dissolved form in the water. A reddish-brown colour to the water, or an accumulation or...

Lead is a naturally occurring element that is present in some minerals in rocks and soils, but the main source of lead in drinking water is generally through contact with plumbing components containing lead. The amount of lead dissolved into drinking water depends on a number of...

Manganese occurs naturally in PEI rocks and soils. Usually it is not easily dissolved from these sources and its concentration in well water is low. In some cases, particularly in swampy areas where oxygen levels in groundwater are low, manganese is more easily dissolved and can...

Nitrate is a naturally occurring form of nitrogen that is commonly found throughout the environment. It is present at low levels in most groundwaters, but can be present significantly higher levels in areas with extensive use of fertilizers, storage and spreading of manure or...

Selenium is a naturally occurring element that is widely distributed throughout the Earth’s rocks and soils and is found in trace quantities in most plant and animal tissues. Selenium can be dissolved by weathering of minerals in the soil or rock or deposited from atmospheric...

Uranium is a naturally occurring element that is widely distributed throughout the Earth’s rocks and soils. Uranium can be dissolved from minerals in the soil or rock and be present in groundwater. The concentration of uranium in water is typically very small, but varies from...