Groundwater in Rockingham County contains manganese, iron, and nitrate, and these contaminants exceed EPA health standards. The levels are high enough that well owners should be aware and test their water.
The Valley and Ridge bedrock beneath this county contains iron and manganese naturally mixed into the rock layers. As groundwater seeps slowly through these rocks, it dissolves these metals and carries them into wells. Nitrate comes from the surface--it enters from septic systems, livestock, or fertilizer and travels down through the soil into the groundwater below.
Groundwater in this county is very hard, driven by elevated calcium and magnesium from the surrounding rock. The Valley and Ridge formation here has layers rich in these minerals, and water passing through picks them up over time. Very hard water is a widespread characteristic found across most wells in this county.
Wells in Rockingham County commonly have iron, manganese, and nitrate at levels that exceed EPA health standards. Iron and manganese are metals that dissolve from rock as water moves underground. Exposure to high levels of these metals can affect blood, organs, and development over time. Nitrate is a chemical that enters groundwater from fertilizers and septic systems. Babies under six months are especially vulnerable to nitrate exposure, which interferes with how blood carries oxygen.
The very hard water in county wells leaves white mineral scale buildup on fixtures, pipes, and inside appliances. Hard water makes it difficult to get soap and shampoo to lather properly. Over time, mineral deposits can shorten the lifespan of water heaters and dishwashers. You may notice a chalky or bitter taste in your water from the high mineral content.
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 is actually in your water so it can be properly treated. We recommend a comprehensive metals and minerals panel to check for all these concerns, which typically costs between two hundred and four hundred dollars. Iron and manganese removal systems paired with water softening can address multiple problems 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 ⓘ |
|---|---|---|---|---|---|
| Manganese | 181 | 21% | High | High | |
| Iron | 184 | 13% | High | Moderate | |
| Nitrate | 199 | 8% | High | Moderate | |
| E. coli | 1* | 0% | Low | Low ⓘ | |
| Hardness | 188 | — | High | Low | |
| PFBS ⓘ municipal | 24 | — | Moderate | Safe | |
| pH | 199 | — | High | Low | |
| Sodium | 188 | — | High | Low | |
| Total Coliform | 1* | 0% | 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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