Arsenic gives private well owners no warning. It has no color, taste, or smell. Water can look bright in a glass and still carry a level that should not be used for daily drinking or cooking. A refrigerator filter, carbon block, sediment cartridge, or water softener will not reliably solve the problem.
The best whole-house arsenic removal system for most private wells is the Digital AdEdge Arsenic 20 with Bayoxide E33 media and a Fleck 2510SXT valve. It treats both common arsenic forms, uses two cubic feet of iron-based adsorption media, and is sold for total arsenic above 100 parts per billion. Its rated service flow is 6 gallons per minute, so it fits a smaller two-bathroom home better than a house with heavy peak demand.
High-End Arsenic Filter Picks Over $2,000
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Best Overall: Digital AdEdge Arsenic 20 With Fleck 2510SXT
The Digital AdEdge Arsenic 20 whole-house filter is my first choice for a private well with arsenic in both the As(III) and As(V) forms. The system uses Bayoxide E33, a granular ferric oxide-hydroxide media made for arsenic adsorption.
The water passes through a deep bed of iron-based granules. Arsenic attaches to the media surface and remains inside the tank. Treated water exits through a center tube and moves toward the home.
Unlike a water softener, this tank does not swap minerals through salt-based ion exchange. Unlike a carbon filter, it is not aimed mainly at chlorine or odor. Its media was made for arsenic and selected metal ions.
The system was listed at $2,700 on July 24, 2026. It includes a 12-inch mineral tank, two cubic feet of Bayoxide E33, and a Fleck 2510SXT electronic valve. Buyers can select three-quarter-inch or one-inch plumbing connections.
The seller lists a maximum service flow of 6 GPM. That is enough for a shower plus one smaller fixture. It may feel restrictive when two showers, laundry, and a kitchen faucet run at once.
The system is sold for arsenic levels above 100 ppb, with claimed reduction up to 99% under suitable water conditions. A claim on a sales page does not replace treated-water tests. A certified laboratory must check the water after startup and at set intervals throughout the media run.
Best for: One-to-two-bathroom homes, arsenic below or near 100 ppb, and wells that need treatment for both As(III) and As(V).
Best High-Flow Pick: Digital AdEdge Arsenic 27
The Digital AdEdge Arsenic 27 is the larger model for homes that need more media and greater water flow. It uses about 2.7 cubic feet of Bayoxide E33 in a wider mineral tank.
The larger media bed gives arsenic more surface area to attach to. It can also pass water more slowly through each square foot of media at the same household flow. Longer contact can help the tank perform more steadily.
The Arsenic 27 system was listed at $3,673 in July 2026. Replacement media alone was listed near $2,445. Installation, plumbing, water tests, a sediment stage, and pretreatment can raise the full price.
A bigger tank is not automatically better. The well pump must deliver enough water during the valve’s cleaning cycle. The drain must accept the rinse flow without backing up.
Best for: Larger families, homes with overlapping fixture use, and owners who want more media between replacement visits.
Best Dealer-Installed Pick: Culligan Smart HE Arsenic Reduction Filter
The Culligan Aquasential Smart High Efficiency Arsenic Reduction Filter is a dealer-supplied whole-house unit. It uses Cull-AsX53 media for Type III and Type V arsenic.
The Soft-Minder meter records household water use and helps track the media load. Culligan also offers phone-based monitoring and an automatic bypass option on selected packages.
This route suits a homeowner who wants one company to test the water, select pretreatment, install the tanks, collect follow-up samples, and replace spent media. Dealer service usually costs more than a shipped tank, but arsenic treatment benefits from local testing and scheduled follow-up.
Culligan does not post one national price. The quote changes with tank size, arsenic level, flow demand, pipe work, and local labor. A full installation can pass $2,000 and may cost much more when iron removal, pH correction, or a softener is added.
Best for: Homeowners who want local installation, scheduled service, water-use tracking, and one company responsible for the treatment line.
Best Non-Electric Pick: Kinetico Arsenic Guard
Kinetico Arsenic Guard is a whole-house adsorption filter that works without an electric control valve. Water pressure runs the treatment process.
Its UltrAsorb A media targets pentavalent arsenic, also called As(V). Trivalent arsenic, called As(III), must be converted before it reaches the tank. Chlorine, ozone, or another approved oxidant can change As(III) into the form the media catches more readily.
This is a dealer-sized product. The Kinetico dealer tests the water and selects the tank arrangement. Pretreatment may be added for iron, manganese, hardness, sediment, or As(III).
The non-electric design is useful in a home with frequent outages. Treatment does not stop merely because the power fails. Any chemical-feed pump placed before the tank may still need electricity.
Best for: Homes that want non-electric operation and have mainly As(V), or a pretreatment stage that converts As(III).
Best Upflow Pick: GreenFlo LayneRT Arsenic 20
The GreenFlo LayneRT Arsenic 20 is a passive upflow tank. It needs no electric valve and no timed cleaning cycle during normal use.
Water enters near the bottom and rises through LayneRT media. The upward path spreads water across the bed and can reduce channel formation. Channel formation occurs when water cuts one narrow route through the tank and leaves part of the media unused.
The Arsenic 20 model was listed at $2,659 during a July 2026 sale. Smaller 10 and 15 models cost less. The larger unit suits higher household flow and carries more adsorption media.
A passive tank saves rinse water, but trapped sediment remains inside. Strong sediment pretreatment belongs before the arsenic tank. Heavy iron and manganese also need removal before the adsorption bed.
Best for: Homes without a nearby drain, owners who want no electric valve, and wells with low sediment after pretreatment.
Quick Comparison
| System | Media or Method | Power Need | Listed Price | Best Match |
|---|---|---|---|---|
| Digital AdEdge Arsenic 20 | 2.0 cu. ft. Bayoxide E33 | Electric valve | $2,700 | Best overall |
| Digital AdEdge Arsenic 27 | 2.7 cu. ft. Bayoxide E33 | Electric valve | $3,673 | Higher flow and capacity |
| Culligan Smart HE Arsenic Filter | Cull-AsX53 | Model dependent | Dealer quote | Local installation and service |
| Kinetico Arsenic Guard | UltrAsorb A | No electric valve | Dealer quote | As(V) and non-electric use |
| GreenFlo LayneRT Arsenic 20 | LayneRT adsorption media | None | $2,659 sale price | No drain or outlet nearby |
The 10 PPB Arsenic Limit
The federal drinking-water limit for public water systems is 10 parts per billion, written as 10 ppb or 0.010 milligrams per liter. Private wells are not managed under the same federal rules, but the 10 ppb figure gives homeowners a clear treatment target.
A result of 11 ppb is above the limit. A result of 80 ppb is eight times the limit. The water may look and taste the same at both levels.
Do not boil arsenic-contaminated water. Boiling removes water as steam but leaves arsenic behind. The remaining water can hold a higher arsenic concentration.
Until treatment has been fitted and tested, use bottled water or another tested supply for drinking, infant formula, ice, coffee, tea, and food preparation. Bathing normally creates far less arsenic intake than drinking, since inorganic arsenic does not pass through skin easily. Local health advice should guide households with unusually high readings.
Test for Total Arsenic and Arsenic Type
Begin with a sample from a state-certified drinking-water laboratory. A basic total-arsenic result tells you how much is present. It may not tell you which chemical form is present.
Groundwater usually carries arsenic as arsenite, As(III), or arsenate, As(V). As(V) carries an electrical charge across common drinking-water pH levels and is easier for many filters to catch. As(III) is harder for many adsorption and reverse-osmosis units to remove.
Ask for arsenic speciation when the selected treatment only carries an As(V) claim. Speciation separates As(III) from As(V).
Some iron-based media, including Bayoxide E33, are sold for both forms. Other media need an oxidation stage before the adsorption tank. Never assume all arsenic filters handle both forms in the same way.
Whole-House Treatment or Under-Sink Reverse Osmosis?
A whole-house filter treats water before it splits toward showers, sinks, toilets, laundry, and the water heater. It costs more because it must handle hundreds of gallons each day and pass high fixture flow.
An under-sink reverse-osmosis unit treats only drinking and cooking water at one faucet. It costs less and uses far less replacement media. The refrigerator and ice maker can also connect to the treated line.
For many private-well homes, an under-sink RO unit with a certified arsenic claim is the most economical answer. The family drinks and cooks with treated water, while untreated water continues to serve toilets, showers, and outdoor taps.
Whole-house treatment makes sense when arsenic is very high, children may drink from bathroom faucets, several kitchens need treated water, or the owner wants every indoor tap treated.
A strong setup may use both methods. The whole-house tank carries the main arsenic load. An under-sink RO unit acts as a second barrier at the kitchen faucet.
Best Under-Sink Backup: NSF-Certified Reverse Osmosis
Look for an under-sink reverse-osmosis system with an arsenic reduction claim under NSF/ANSI 58. The standard number alone is not enough. The product listing must name arsenic reduction for the exact model.
Many certified household units carry a pentavalent arsenic claim for incoming levels up to 50 ppb. That claim may not cover As(III), and it may not cover a well with arsenic far above 50 ppb.
Pretreatment oxidation can convert As(III) into As(V). A whole-house adsorption tank can also lower the arsenic before the kitchen RO unit receives it.
Test the RO faucet water at startup. Repeat the test on a schedule based on lab advice, raw-water arsenic, membrane age, and household use.
How Bayoxide E33 Works
Bayoxide E33 is made from granular ferric oxide-hydroxide. Each grain has a large internal surface. Arsenic ions attach to that iron-rich surface as water passes through the bed.
The reaction resembles dust sticking to damp paint. Once arsenic has attached to a working site, that site has less room for the next arsenic ion. The media slowly fills even though it may look unchanged from the outside.
The media does not give water a new taste, and it does not need salt regeneration. Once its arsenic capacity has been used, the bed must be replaced.
LANXESS states that Bayoxide E33 can adsorb both As(V) and As(III). Real media life still depends on pH, arsenic level, flow, phosphate, silica, iron, and total gallons.
Water Chemistry Can Shorten Media Life
An arsenic tank does not work in isolation. Other dissolved material competes for space on the media.
High pH
Many iron-based adsorption beds hold arsenic better in mildly acidic or neutral water. Capacity often falls as pH rises. A well near pH 8.5 may use media faster than a well near pH 7.
Phosphate
Phosphate binds strongly to iron-based media. It can take spaces that would otherwise hold arsenic.
Silica
Silica can coat adsorption sites and shorten the bed run. A laboratory panel for arsenic treatment should include silica when the dealer or media maker asks for it.
Iron and Manganese
Iron may help arsenic removal in some oxidation and filtration setups, but heavy iron can plug a small adsorption cartridge. Manganese deposits can also reduce flow.
Suspended Sediment
Clay, sand, and rust can cover the media surface. A spin-down screen or sediment filter belongs before the arsenic tank when the well carries particles.
When Oxidation Is Needed
As(III) often needs conversion to As(V) before treatment with media that targets only As(V). Chlorine is a common oxidant. Ozone and permanganate may also be used in professionally selected treatment lines.
The oxidant needs enough contact time to finish the conversion. A feed pump alone may not provide enough reaction time when water runs straight into the adsorption tank.
A contact tank gives the chemical time to work. A carbon stage may follow when chlorine taste needs removal, though equipment order must be selected with arsenic capture in mind.
Do not add bleach by guesswork. The dose depends on flow, arsenic type, iron, manganese, pH, and chlorine demand. Poor dosing can leave As(III) untreated or send excess chlorine into later equipment.
When Iron-Based Oxidation and Filtration Works
Some wells carry arsenic together with high natural iron. Oxidation converts dissolved iron into rust particles. Arsenic can attach to the iron particles, which are then caught in a backwashing media tank.
AdEdge AD26 media is made for iron, manganese, sulfur, and arsenic when arsenic occurs with enough iron. The process can lower arsenic below 10 ppb under suitable water conditions.
This method is not the same as installing a normal iron filter and assuming arsenic will disappear. The iron-to-arsenic ratio, pH, oxidation dose, contact time, and filter loading must be checked.
A pilot test or dealer sizing may be wise when arsenic is high or water chemistry changes through the year.
How to Size a Whole-House Arsenic Filter
Three numbers control tank size: peak household flow, daily gallons, and raw arsenic concentration.
A shower may use 1.5 to 2.5 GPM. A kitchen faucet may draw close to 2 GPM. A washing machine can draw 3 to 5 GPM while filling.
A 6 GPM filter can supply one shower and a small faucet. It may lose pressure when two showers run together. A large home may need two tanks in parallel or a wider commercial vessel.
Daily use controls how quickly the media fills. A two-person home using 120 gallons per day places a much smaller load on the bed than a six-person home using 500 gallons.
Raw concentration also changes bed life. A filter receiving 80 ppb reaches exhaustion sooner than the same filter receiving 20 ppb, all other conditions being equal.
Lead-Lag Twin Tanks Give Better Protection
A lead-lag arrangement uses two arsenic tanks in a row. The first tank carries most of the load. The second tank catches arsenic after the first one begins to weaken.
A sample valve between the tanks lets the homeowner test the first tank’s output. When arsenic appears between the tanks but remains low after the second tank, the first bed can be replaced.
The former second tank then moves into the first position. A tank with new media becomes the second guard. This rotation uses more of the media capacity without sending breakthrough water into the house.
Lead-lag treatment costs more at installation, but it gives a stronger safety margin for high readings, large families, rental homes, and properties where missed filter service would carry a high cost.
Recommended Installation Order
A common private-well treatment line may run in this order:
- Well pump and pressure tank
- Coarse sand separator
- Iron, manganese, or sulfur treatment when needed
- pH adjustment when required by the arsenic media
- Fine sediment filter
- Lead arsenic adsorption tank
- Lag arsenic adsorption tank when selected
- Water softener when needed and approved for that placement
- UV chamber when bacteria treatment is required
- Kitchen reverse-osmosis unit as a final drinking-water barrier
The exact order changes with the laboratory report. A pH neutralizer can add calcium hardness. An iron filter may need oxidant. A softener may remove iron that would otherwise help arsenic coprecipitation.
Have the treatment dealer provide a written flow diagram with sample taps before and after every main arsenic stage.
Testing After Installation
Do not judge an arsenic filter by taste or appearance. Only a laboratory test can show whether the treated level has fallen below the target.
Collect a treated-water sample after the new media has been rinsed and the plumbing has been flushed. Test the kitchen tap and a sample valve directly after the arsenic tank.
Repeat the test a few weeks later. Continue with a schedule set by the laboratory, health department, or treatment dealer. High raw arsenic may call for more frequent checks.
Keep a written record of raw arsenic, treated arsenic, total gallons, media age, pH, iron, and service dates. A rising treated level can warn that the bed is near exhaustion.
Media Replacement and Disposal
Arsenic adsorption media can last from months to several years. No honest seller can give one replacement date without the full water report and household gallon use.
Some Bayoxide E33 sellers give a common life near two to three years below 100 ppb. That is an estimate, not a promise. High phosphate, silica, pH, or daily water use can shorten it.
Spent media contains captured arsenic. Disposal rules may differ by state and by the amount of arsenic in the exhausted bed. Do not dump it beside the well, garden, drainage ditch, or septic field.
Ask the local waste office or water-treatment dealer how the used media must be handled. Large treatment beds may need waste testing before disposal.
Which Arsenic Removal System Should You Buy?
Choose the Digital AdEdge Arsenic 20 for a smaller home that needs whole-house treatment for both As(III) and As(V). Its two-cubic-foot Bayoxide bed gives more capacity than a cartridge housing.
Choose the Digital AdEdge Arsenic 27 when the family needs more water flow or a larger media reserve.
Choose the Culligan Smart HE Arsenic Filter when local installation, monitoring, and scheduled service matter more than a lower online price.
Choose the Kinetico Arsenic Guard when non-electric operation matters and the water contains mainly As(V), or when oxidation has been added for As(III).
Choose the GreenFlo LayneRT Arsenic 20 when the mechanical room has no practical drain or electric outlet.
Add an NSF/ANSI 58 reverse-osmosis unit with an arsenic claim at the kitchen sink as a second barrier. Confirm that the claim covers the incoming arsenic level and form found in the well.
The best arsenic treatment is not the tank with the largest price or the boldest reduction claim. It is the unit matched to arsenic type, pH, phosphate, silica, iron, household flow, and total gallons. Laboratory tests then prove that the filter is still doing its silent work.
Frequently Asked Questions
What is the safest way to remove arsenic from private well water?
Use adsorption media or reverse osmosis selected from a certified laboratory report. Test the treated water after installation and throughout the filter’s life.
Does a water softener remove arsenic?
A normal hardness softener should not be trusted for arsenic. Specialty anion resin can remove As(V) under selected conditions, but competing sulfate and As(III) can cause trouble.
Does activated carbon remove arsenic?
Standard activated carbon is not a dependable arsenic treatment. Use iron-based adsorption media, activated alumina, specialty resin, or reverse osmosis made for arsenic reduction.
Can boiling remove arsenic?
No. Boiling can raise the concentration because water leaves as steam while arsenic remains behind.
Will reverse osmosis remove both As(III) and As(V)?
RO generally removes As(V) more readily than As(III). Oxidation before the membrane may be needed when As(III) is present.
How often should treated water be tested?
Test after installation, again after the first weeks of use, and at intervals set from the raw arsenic level and estimated media life. Test more often as the bed nears its expected replacement point.
Can I bathe in water with arsenic?
Drinking and cooking are the main exposure routes. Skin absorbs little inorganic arsenic from water. Very high results still deserve advice from the local health department.
Is 10 ppb arsenic safe?
Ten ppb is the federal limit for public drinking water. Many homeowners aim below that figure and use a second kitchen treatment stage for extra protection.