Well Water in Coleman County: What to Test and Why

High Risk
Testing Strongly Recommended 485 well tests on record
Top Concerns in This County
Iron

Why This Happens Here

Well owners in Coleman County should be aware of iron, fluoride, and arsenic in their groundwater. Fluoride and iron are present at levels high enough to exceed EPA health standards, which is a concern worth addressing.

These contaminants come from the rock layers beneath the county. Iron dissolves naturally from the rocks as groundwater moves through them, while fluoride and arsenic are released from minerals in the formation under conditions that are common in this part of Texas.

Groundwater in Coleman County is notably high in iron. Iron concentrates in the water because of the composition of the rock and soil layers that store and filter the water in this area. Most wells in the county show elevated iron levels.

What This Means for You

Wells in Coleman County commonly have fluoride and iron at levels that exceed EPA health standards. Fluoride at high levels can damage children's teeth during development and cause skeletal problems with long-term exposure. Iron itself is not toxic, but arsenic sometimes appears alongside iron in county wells, and arsenic exposure increases the risk of cancer and can harm the kidneys and digestive system.

The high iron in many county wells creates visible staining on sinks, toilets, and laundry that is hard to remove. Iron can make water taste metallic and leave rust-colored deposits throughout your plumbing system. These mineral issues can corrode pipes and shorten the lifespan of water heaters and dishwashers over time.

We recommend a comprehensive water test to find out exactly what is in your well, since every well is different and yours could have higher or lower levels than what is common in the county. Testing is the only way to know what you are actually dealing with so you can treat it properly. A comprehensive panel typically costs $200 to $400 and will check for metals, minerals, and bacteria. Depending on results, treatment options like reverse osmosis systems or ion exchange filters can address multiple concerns at once.

Not sure if your well is affected? Get certified results in 5–7 days.

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Contaminant Detection Data

Contaminant Samples % Above MCL Distribution Confidence Risk
Iron 4 50%
Low High
Fluoride 477 2%
High Low
Arsenic 3 0%
Low Low
HFPO-DA (GenX) ⓘ municipal 11 0%
Low Safe
Lead 3 0%
Low Safe
Manganese 3 0%
Low Low
PFHxS ⓘ municipal 11 0%
Low Safe
PFNA ⓘ municipal 11 0%
Low Safe
PFOA ⓘ municipal 11 0%
Low Safe
PFOS ⓘ municipal 11 0%
Low Safe
PFBS ⓘ municipal 11
Low Safe

MCL = Maximum Contaminant Level (EPA limit for public water; used as benchmark for private wells). Distribution shows % of sampled wells in each concentration band. Methodology.
* Microbial contaminants (E. coli, coliform) reflect only samples from the last 10 years.

Data shows potential risk — a certified test confirms whether your water is affected.

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