Arsenic in Well WaterOne of the largest concerns for residential water well owners across the globe is discovering arsenic in well water. Arsenic is a naturally occurring element that is often found in water wells or in soil; regardless of location. The concentration of arsenic will vary based on the geographic location; however, when discovered in higher concentration levels, must be treated using a few proven methods as approved by the Environmental Protection Agency (EPA) and the US Department of Agriculture.

There are a few facts about Arsenic that are important to understand in order to fully realize how the methods listed below help to remove it from the end water supply. It’s also critical to understand that there are professional residential well water testing procedures and specially trained companies that can annually test for arsenic in your well water in Phoenix.

First – What is Arsenic and how is it harmful?

Many of us have heard of Arsenic, but may not know exactly what it is and how it’s harmful to humans. Essentially, there are two forms that Arsenic takes. In areas that are shallow; where the oxygen concentration is high, Arsenic exists as Arsenate. In deep water areas with less oxygen levels, it’s referred to as Arsenite. Arsenic poisoning or arsenicosis is the medical condition that some people may be diagnosed with through the injection of higher levels of Arsenic. This naturally occurring element does not give off any smell or flavor; and is often only detected through specialized equipment.

Second – What are the best ways to remove Arsenic from well water supply?

There are generally three proven methods for removing arsenic from standard water supply and well water systems. Each of these items listed below have different Pro’s and Con’s; so it is best to always consult with a well water testing company in Phoenix to pick a solution best suited for your individual application.

Anion Exchange Systems for Removing Arsenic

A growing type of system for removing Arsenic is the Anion exchange system. This uses a chemical or physical process to exchange ions as water passes through a resin bed or filtration system. These types of systems soften water, remove manganese and iron and can be installed prior to the water entering a home’s water supply or at the source of the individual spout. The resin bed or filter is charged with chloride ions derived from salt that has dissolved. They typically require very little maintenance, but require additional salt to be added frequently.

Reverse Osmosis Systems

Typically the most cost-effective way of removing arsenic from water is the reverse osmosis system. RO (as it’s commonly referred) works by forcing water through a special membrane (filter) that has microscopic pores to allow smaller particles through and trapping the larger molecules (like iron, chromium and arsenic. Most RO systems are incredibly efficient in trapping arsenic and other potentially harmful natural metals; and in most case, remove up to 95% of them from the water supply. Typically these systems are installed at the source of the water spout, underneath cabinets or sinks. They are very user friendly and require virtually no maintenance; including no need to add chemicals or salt.

Iron Oxide Filter Systems

The last of the best methods for removing arsenic from water well systems is the iron oxide filtration systems. Essentially these are the latest and greatest methods for lowering arsenic in drinking water. It’s very similar to carbon filters; but instead of carbon, the material is iron oxide. They are housed in small, in-line filtration media cartridges and need to be replaced on a regular scheduled interval. They are often installed inside the plumbing line or attached directly to a water supply outlet; such as a faucet or showerhead.

When it comes to removing arsenic from well water, there are several options to choose from. The best way to determine which is best suited for you is to contact a Phoenix well water testing company and ask them to provide recommendations, Pro’s and Con’s about each system; so you can make an informed decision.


Do you need a residential well inspection? Call Pump It Up Pump Services, Inc. and let one of our professionals answer your water well questions. Call 623-582-5069 now!

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