Groundwater in Sumter County contains manganese, iron, and nitrate at levels that exceed EPA health standards. These contaminant levels are concerning enough that well owners should be aware of them.
Manganese and iron occur naturally in the sand and clay layers beneath the county. Nitrate enters groundwater mainly through agricultural activities and fertilizer use on the land above. The local geology in this area does not filter out these contaminants effectively.
Groundwater in this county is soft, with low iron and low sodium levels, but manganese is elevated in the water. Manganese comes from the sandy and clay layers of the aquifer system and accumulates as water moves through the rock underground. Most wells in Sumter County show elevated manganese as a common characteristic of the groundwater here.
Wells in Sumter County commonly exceed EPA health standards for iron, manganese, and nitrate. Iron and manganese are metals that build up in your body over time and can damage your brain, nervous system, and organs. Nitrate is especially dangerous for infants and young children, causing serious blood oxygen problems. These three contaminants together mean the groundwater here needs attention.
The good news is that Sumter County has soft water with low mineral levels overall. You won't see heavy rust staining, scale buildup, or taste and odor problems from minerals that plague harder-water areas. Your water should feel and taste relatively normal without the slime or soap problems that come with high hardness. Appliances should not wear out early from mineral deposits.
Every well is different, and your well may have higher or lower levels than what is common in the county. We recommend a comprehensive metals and minerals panel to find out exactly what is in your water--testing costs between two hundred and four hundred dollars. Testing is the only way to know what needs treatment, whether that is filtration systems or water softening. Once you know your results, you can get the right solution for your family.
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 | 177 | 32% | High | High | |
| Iron | 178 | 15% | High | High | |
| Nitrate | 534 | 4% | High |
Moderate
Elevated concentration, not % above limit
|
|
| PFOA ⓘ municipal | 6 | 0% | Low | Safe ⓘ | |
| PFNA ⓘ municipal | 6 | 0% | Low | Safe ⓘ | |
| Chloride | 521 | 0% | High | Low | |
| Arsenic | 19 | 0% | Moderate | Low | |
| Sodium | 184 | — | High | Low | |
| Hardness | 188 | — | High | Low | |
| PFBS ⓘ municipal | 6 | — | Low | Safe ⓘ | |
| pH | 492 | — | High | 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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