Iron Filter for Well Water in SC: What Makes One Work

An iron filter for well water is a tank that sits where your water enters the house. It turns dissolved iron into particles, traps them, then flushes them out. That flush is called a backwash. When the filter is matched to your water and your well, the orange stains stop. When it isn't, you've bought an expensive tank that passes iron straight through.

Austin Drilling has worked on South Carolina wells since 1960. We see the second outcome more than we'd like. So here's what decides which one you get.

Is an iron filter necessary?

Sometimes it isn't. A University of Georgia Extension bulletin says to consider one when iron tops 0.30 mg/L or manganese tops 0.05 mg/L. Below those levels, the problem is mostly cosmetic. A softener can handle light iron by itself.

Above them, you'll know. You get orange toilet bowls, pink laundry and a metallic taste in your coffee. Our guide to iron in well water walks through the causes and the types of iron.

What filter is best for removing iron?

There's no single best one. The right filter depends on three numbers, and only a water test gives you all three.

The first is iron level. The UGA bulletin says common filter media shouldn't be used on water with more than 10 ppm iron. Above that, you need a stronger setup, usually a chemical feed ahead of the filter.

The second is pH. Birm media needs a pH of 6.8 or higher, per the same bulletin. Greensand needs 6.2 to 8.8. Water below 6.2 actually strips manganese out of greensand and wears it down.

The third is what else is in there. Rotten-egg smell means sulfur. Slime in the toilet tank means iron bacteria, and that slime clogs a filter. You'd treat the bacteria first with shock chlorination.

Why does pH matter so much in South Carolina?

Because a lot of our water is acidic. The USGS studied wells in Aiken County and part of Lexington County. It found the Coastal Plain aquifers there carry acidic water. Bedrock wells in the same study ran neutral.

That means two homes a few miles apart can need different filters. A filter that works great for your neighbor may fail on your well. Acidic water often needs a neutralizer ahead of the iron filter. Skip that step, and the media gives out early.

Can your well pump keep up with an iron filter?

This is the question filter sellers skip. And it's the one a well company should answer.

Every iron filter has to backwash. The UGA bulletin says particles can clog a filter within days to weeks. It also says a backwash usually needs more than double your normal flow. That water comes from your pump.

A weak well or an undersized pump can't deliver it. The filter never gets clean. Iron builds up in the bed, and the filter starts passing it through. If you've ever wondered what size well pump you need, a filter is one more load to plan for.

We check your pump and your well's output before we pick a filter. A big filter on a small pump isn't a bargain.

How does Austin Drilling install an iron filter?

We test first. Bring or mail us a sample for a free mineral analysis. If you want the full picture, we can send it to a state lab.

Then we tell you plainly what we found. If your water is fine, we say so. If it needs treatment, we size the system to your iron, your pH and your pump. Our own crew installs it, and we test your water again afterward. That's how you know it worked. You can see everything we do on our water treatment page.

Call Austin Drilling and we'll sort out your water. West Columbia is (803) 926-5402 and Newberry is (803) 926-7080.

FAQ

How do I filter iron out of my water?

Test it first. Then pick a filter that matches your iron level, pH and pump flow. Most SC homes use an oxidizing filter that backwashes on its own.

How much does it cost to install an iron filter?

It depends on your iron level, your pH and whether you need a neutralizer or chemical feed first. We quote after a free water analysis, so you only pay for what your water needs.

Will an iron filter fix sulfur smell too?

Oxidizing filters can remove some sulfur smell. The UGA bulletin says not to rely on them above 5 ppm hydrogen sulfide. Higher levels need a chemical feed first.