Chloride, E. coli, and fecal coliform are the main contaminants detected in Alexandria's groundwater. None of these reach levels that exceed EPA health standards, so contaminant levels here are low.
These bacteria and chloride enter groundwater through sewage leaks and road salt runoff in this urban area. The sandy and gravelly layers beneath Alexandria do not naturally filter out these contaminants as effectively as denser rock would. Urban development and aging infrastructure make contamination sources closer to drinking water supplies.
Groundwater in Alexandria is soft with low iron, which means the water is not hard and does not carry much dissolved metal from the rock. The sandy layers beneath the city do not contain the limestone or iron-rich stone that would add hardness or iron to the water. Most wells in Alexandria show this same soft-water character.
Wells in Alexandria have elevated chloride and bacteria concerns that need attention. Bacterial contamination including E. coli and fecal coliform can cause serious illness, especially in children, elderly people, and those with weak immune systems. Chloride at elevated levels can be harmful to people with certain health conditions like heart disease or high blood pressure. These contaminants show up in some wells in your area and require prompt action.
The good news is that the water in this area tends to be soft with low iron, so you won't deal with staining, scale buildup in pipes, or the reddish discoloration that troubles many well owners elsewhere. You should have clean-tasting water without mineral odors or metallic flavors.
We recommend testing your well right away because bacteria is a serious issue and every well is different. Your well may have higher or lower bacteria levels and chloride than what shows up across the county. Testing is the only way to know what you're dealing with so you can treat it properly. A basic screen for bacteria and nitrate costs around fifty to one hundred dollars, and chloride can be tested as part of that panel. Chlorination or ultraviolet treatment can address bacteria, while reverse osmosis or ion exchange can reduce chloride.
| Contaminant | Samples ⓘ | % Above MCL ⓘ | Distribution ⓘ | Confidence ⓘ | Risk ⓘ |
|---|---|---|---|---|---|
| Chloride | 2 | 0% | Low | Low ⓘ | |
| Fluoride | 2 | 0% | Low | Low ⓘ | |
| Iron | 2 | 0% | Low | Low ⓘ | |
| Nitrate | 2 | 0% | Low | Low ⓘ | |
| Nitrite | 2 | 0% | Low | Low ⓘ | |
| Sulfate | 2 | 0% | Low | Low ⓘ | |
| Hardness | 2 | — | Low | Low ⓘ | |
| pH | 2 | — | Low | Low ⓘ | |
| Sodium | 2 | — | 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.
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