Well Water in Clay County: What to Test and Why

Moderate Risk
Testing Recommended 117 well tests on record
Top Concerns in This County
Nitrate

Why This Happens Here

Groundwater in Clay County contains nitrate, iron, and arsenic. Iron and nitrate exceed EPA health standards in this area, so well owners should test their water and consider treatment if levels are high in their specific wells.

These contaminants come from different sources in the landscape. Nitrate enters groundwater from fertilizers and septic systems in areas with farming and rural homes. Iron and arsenic occur naturally in the rock layers beneath Clay County and dissolve into the water as it moves through the ground.

Groundwater in this county is notable for containing elevated iron, which comes from the rock and soil minerals that naturally occur here. As water sits in the ground and oxygen levels drop, iron becomes more soluble and moves into the water supply. Iron levels are low across most of this county's wells, though some wells may have higher amounts depending on their depth and location.

What This Means for You

Wells in Clay County have been found to contain iron and nitrate at levels that exceed EPA health standards. Iron exposure can cause problems with your organs over time. Nitrate in drinking water is especially concerning for infants and can interfere with how blood carries oxygen in the body.

Iron in county well water shows up as orange or brown staining on sinks, toilets, and laundry. It can also give water a metallic taste and create rust-colored particles. These stains are hard to remove and can build up on fixtures and inside pipes over time.

We recommend testing your well water since every well in the county is different from the others. Your well may have much higher or much lower levels than what is common here. Testing is the only way to know what is actually in your water so you can treat it properly. A comprehensive metals panel typically costs between two hundred and four hundred dollars. Iron can be removed with filtration systems, and nitrate removal requires more specialized equipment like ion exchange.

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
Nitrate 13 31%
Low High
Iron 36 6%
Moderate Moderate
Arsenic 8 0%
Low Low
Chloride 1 0%
Low Low
Fluoride 112 0%
High Low
HFPO-DA (GenX) ⓘ municipal 8 0%
Low Safe
Lead 8 0%
Low Low
Manganese 21 0%
Moderate Low
PFHxS ⓘ municipal 8 0%
Low Safe
PFNA ⓘ municipal 8 0%
Low Safe
PFOA ⓘ municipal 8 0%
Low Safe
PFOS ⓘ municipal 8 0%
Low Safe
Uranium 2 0%
Low Low
pH 1
Low Low
PFBS ⓘ municipal 8
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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Population Health Context

Population-level CDC data. Not individual risk prediction.

6.0%
Cancer Prevalence
(state avg: 6.1%)

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