Iron, manganese, and arsenic are present in Clark County's groundwater. Iron and manganese exceed EPA health standards in this county, which is a concern that warrants attention.
The rock beneath Clark County naturally contains iron and manganese. As water moves slowly through these rocks underground, these metals dissolve into the water. Arsenic also comes from the natural breakdown of rock layers in the area.
Groundwater in this county is moderately hard, driven by elevated calcium and magnesium from the bedrock. Iron concentrates in the water because the mixed rock types here naturally release it as water passes through. These characteristics are common across wells in Clark County.
Iron and manganese are found at levels above EPA health standards in wells across Clark County. Exposure to elevated iron can damage your organs over time. Manganese can affect your brain and nervous system, especially in children and developing fetuses. Arsenic also shows up in some county wells and can cause skin changes and increase cancer risk with long-term exposure.
Wells in this county are moderately hard, which means you may see orange or brown staining from iron on fixtures, laundry, and plumbing. Manganese creates similar dark stains. The water might taste metallic or have an unpleasant odor. Hard water can also leave scale buildup in pipes and shorten the lifespan of water heaters and dishwashers over time.
We recommend testing your well to find out what is actually in your water. Every well is different, and your well may have higher or lower levels than what is common in the county. Testing is the only way to know what needs treatment. A comprehensive metals and minerals panel typically costs $200-400 and can check for iron, manganese, and arsenic, while iron removal filters or water softeners can help address these concerns.
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 ⓘ |
|---|---|---|---|---|---|
| Iron | 47 | 32% | Moderate | High | |
| Manganese | 47 | 23% | Moderate | High | |
| Uranium | 1 | 0% | Low | Safe ⓘ | |
| Sulfate | 46 | 0% | Moderate | Low | |
| PFOS | 9 | 0% | Low | Low ⓘ | |
| PFOA | 9 | 0% | Low | Low ⓘ | |
| PFNA | 9 | 0% | Low | Low ⓘ | |
| PFHxS | 9 | 0% | Low | Low ⓘ | |
| Nitrite | 17 | 0% | Moderate | Low | |
| Nitrate | 35 | 0% | Moderate | Low | |
| Lead | 2 | 0% | Low | Safe ⓘ | |
| HFPO-DA (GenX) | 9 | 0% | Low | Safe ⓘ | |
| Fluoride | 37 | 0% | Moderate | Low | |
| Chloride | 46 | 0% | Moderate | Low | |
| Arsenic | 2 | 0% | Low | Low ⓘ | |
| PFBS | 9 | — | Low | Low ⓘ | |
| Hardness | 47 | — | Moderate | Low | |
| Sodium | 27 | — | Moderate | Low | |
| pH | 47 | — | Moderate | 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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