Groundwater in Coryell County contains chloride, sulfate, iron, fluoride, and manganese at levels that exceed EPA health standards. Several of these contaminants are present at elevated to high concentrations, so well owners should test their water and know what they are drinking.
These minerals come from the rock layers beneath the county. Chloride and sulfate dissolve naturally from the rocks as water moves through them underground. Iron and manganese also come from the rocks themselves. In some areas, human activities like salt use or old industrial sites may add to chloride levels, but the main source is the geology below.
Groundwater in this county is notably high in sodium and sulfate, which drive much of the water's mineral character. These minerals dissolve naturally from the surrounding rocks as water flows through the layers below ground. Most wells in the county show these elevated mineral concentrations.
Wells in Coryell County have been found to contain several substances at levels that exceed EPA health standards. Chloride and sulfate can affect people with certain heart or kidney conditions. Fluoride at elevated levels can cause dental problems, especially in children whose teeth are still developing. Iron and manganese are present in county wells, and at high levels they can affect the brain and nervous system. PFOS is a chemical that builds up in the body over time and can harm the immune system and liver.
The water in this county tends to be salty from high sodium levels, which can give the water a noticeable taste. Iron and sulfate create unpleasant odors and can stain sinks, laundry, and fixtures with orange or brown marks. Although the water is soft overall, these mineral issues still affect everyday use and appearance of your home.
Every well is different, and your water could have higher or lower levels than what is common in the county. We recommend testing to find out what is actually in your well so you can treat it properly. A comprehensive panel for metals and minerals runs between $200 and $400. Water softeners or reverse osmosis systems can address several of these concerns at once.
Not sure if your well is affected? Get certified results in 5–7 days.
Test Your Well Water with Tap Score →| Contaminant | Samples ⓘ | % Above MCL ⓘ | Distribution ⓘ | Confidence ⓘ | Risk ⓘ |
|---|---|---|---|---|---|
| Chloride | 4 | 50% | Low | High ⓘ | |
| Sulfate | 3 | 33% | Low | High ⓘ | |
| Iron | 179 | 16% | High | High | |
| Fluoride | 273 | 9% | High | Moderate | |
| PFOS ⓘ municipal | 20 | 5% | Moderate | Moderate | |
| Manganese | 109 | 1% | High | Low | |
| Arsenic | 38 | 0% | Moderate | Low | |
| HFPO-DA (GenX) ⓘ municipal | 20 | 0% | Moderate | Safe | |
| Lead | 38 | 0% | Moderate | Low | |
| Nitrate | 13 | 0% | Low | Low | |
| PFHxS ⓘ municipal | 20 | 0% | Moderate | Low | |
| PFNA ⓘ municipal | 20 | 0% | Moderate | Safe | |
| PFOA ⓘ municipal | 20 | 0% | Moderate | Safe | |
| Uranium | 5 | 0% | Low | Safe ⓘ | |
| Sodium | 3 | — | Low | Low ⓘ | |
| pH | 4 | — | Low | Low ⓘ | |
| PFBS ⓘ municipal | 20 | — | Moderate | Low | |
| Hardness | 3 | — | Low | Low ⓘ |
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.
Order a Tap Score Test →Population-level CDC data. Not individual risk prediction.
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