Water Problem
Iron in water causes orange, red or brown staining and a metallic taste. The important distinction is what form it's in: iron that's still dissolved looks clear at the tap and turns orange after sitting, while iron that's already oxidised arrives visibly discoloured. Those two are treated differently — which is why "I have iron" isn't enough to specify a system.
Try this first Fill a clear glass and let it sit for twenty minutes. Clear at first, then orange sediment at the bottom? That's dissolved iron. Orange from the moment it leaves the tap? Already oxidised.
Step One
Clogged nozzles like these are usually the last stage of a problem that started upstream. Once we confirmed low pH, iron and manganese together, the fix was pH correction first, then oxidation and filtration — not another shower head.
Step Two
Iron is one of the most abundant elements in the earth's crust. Groundwater moving through iron-bearing formations dissolves it along the way, which is why it's so common on private wells across this region.
Iron held in solution, invisible at the tap. It oxidises when it meets air — in a glass, in the toilet tank, in the wash — which is when the orange appears. Treatment usually involves converting it to a filterable form first.
Iron that's already reacted and is present as visible particles. The water looks discoloured immediately. This is more a filtration problem than an oxidation problem.
Naturally occurring organisms that feed on iron and leave behind a reddish, slimy residue. They can foul well components, plumbing and treatment equipment, and often require disinfecting the well in addition to filtering.
Sometimes the iron isn't coming from the water source at all. Older galvanised pipe can contribute iron, which points to a plumbing issue rather than a treatment one — and we'd tell you that rather than sell you a filter.
Step Three
For context, iron appears under the EPA's secondary standards, which address aesthetic characteristics such as taste and staining rather than health-based limits. More on the process: how Gridline evaluates water.
Step Four
Which one fits depends on the level, the form, the pH and what else is in the water.
The most common approach for dissolved iron. The iron is converted into a filterable form and then removed by the media. Several oxidation methods and media types exist.
Depends on: iron level · pH · manganese present · required backwash flow rateWhere iron is present as visible particles, a filtration-led approach may be appropriate — sometimes with sediment prefiltration ahead of it to handle the load.
Depends on: particle load · particle size · flow rateSome softeners manage limited dissolved iron alongside hardness. But a softener is not an iron filter — using one as a substitute shortens resin life and usually disappoints.
Depends on: iron level · form · resin type · manufacturer specificationsFiltration alone doesn't address bacteria that recolonise. Disinfecting the well and plumbing is usually part of the approach, and may involve coordinating with a well contractor.
Depends on: bacteriological findings · well construction · recurrence after treatmentStep Five
FAQ
Iron is one of the most abundant elements in the earth's crust. Groundwater moving through iron-bearing rock dissolves it along the way, which is why iron is so common on private wells. It can also come from corroding iron or galvanised plumbing inside the home — in which case the source is your pipes rather than your water.
That's dissolved, or ferrous, iron. It's held in solution and invisible when it leaves the tap, then oxidises on contact with air — in a glass, in the toilet tank, on laundry — which is when the orange appears. Iron that arrives already discoloured has oxidised before reaching you, and the two are treated differently.
Some softeners handle limited amounts of dissolved iron, but a softener isn't an iron filter. Higher levels, or iron that's already oxidised, generally need dedicated treatment installed ahead of the softener. Using a softener as a substitute shortens resin life and produces disappointing results.
Naturally occurring organisms that feed on iron and leave behind a reddish, slimy residue — often noticed in toilet tanks or on fixtures. They can foul well components, plumbing and treatment equipment, and filtration alone doesn't address them. Disinfecting the well and plumbing is usually part of the approach.
Existing stains can often be reduced with products formulated for rust and iron. Chlorine bleach is generally counterproductive — it oxidises the iron further and can set the stain. The lasting fix is treating the water so new staining stops happening.
Iron treatment across Greater PhiladelphiaCommon on private wells throughout Bucks, Montgomery and Delaware County.
Next Step
The level and the form together determine the treatment. We'll evaluate both before recommending anything.
