Arsenic is a naturally occurring element that can be found in soil, rocks, and water. It is commonly found in groundwater and can be present in both organic and inorganic forms. While small amounts of arsenic can be found in most natural water sources, higher levels of arsenic can be dangerous to human health.

WHO guidelines recommend a limit of 10 ppb (μg/l) for arsenic contamination in drinking water, not to say that this is a safe level. India has a permissible level of 50 ppb (μg/l) and a desirable level of 10 ppb (μg/l). Australia has reduced the limit to 7 ppb (μg/l), whilst in the USA; New Jersey & South Caroline have a limit of 5 ppb (μg/l).

Long-term exposure to high levels of arsenic in drinking water can lead to serious health problems such as cancer, heart disease, and neurological damage. In conclusion, arsenic is a naturally occurring element that can be found in water, but high levels of it can be dangerous to human health. It is important to test for arsenic in water sources to ensure that the water is safe to drink. Reliable test kits can help detect the presence of arsenic in water, and allow for proper treatment to remove it, ensuring safe and clean drinking water for everyone.