Manganese in Delaware well water
In Delaware, manganese was detected in 96% of 1,240 tested private well samples.
Manganese stains fixtures and laundry above 50 ug/L. EPA's health advisory is 300 ug/L; infants are the most sensitive, and newer research links elevated manganese to neurological effects in children. It is one of the most common private well problems in New England.
Check your manganese number
Type the value from your lab report. It is compared to the EPA limit, the same way the full interpretation does it.
Test your Delaware well for manganese
Certified lab analysis of your own tap water, bottles and prepaid return shipping included. The Essential well panel covers arsenic, uranium, nitrate, lead, copper, manganese, iron, sodium and bacteria; radon and PFAS are add-ons.
Order the Tap Score well water test kit, from $209Already tested? Upload the report
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Systems that remove manganese
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Some links below are affiliate links. If you buy through one, the merchant pays us a commission at no extra cost to you. It does not change which products we list or what the data says.
For manganese
Iron and manganese oxidizing filter
whole-house, at the point of entry, about $1,800
Air-injection or greensand media; fixes staining at the source.
Rather have it installed and sized for your well? Book a free in-home water test with a licensed local company.
Where to get a well tested for manganese in Delaware: certified labs, state programs and prices.
By county, from individual samples
Public monitoring samples against the EPA limit; counties with at least 30 samples.
| County | Above EPA limit | Samples | Detected | Median | Highest |
|---|---|---|---|---|---|
| Sussex | no limit | 695 | 98% | 20.3 | 1,160 ug/L |
| New Castle | no limit | 356 | 96% | 29.5 | 54,000 ug/L |
| Kent | no limit | 189 | 88% | 20 | 570 ug/L |
- Selbyville-Frankford CCD, Sussex County100% detected of 49
- Laurel-Delmar CCD, Sussex County100% detected of 88
- Seaford CCD, Sussex County100% detected of 101
- Milton CCD, Sussex County100% detected of 39
- Kenton CCD, Kent County100% detected of 36
- Millsboro CCD, Sussex County99% detected of 129
- Bridgeville-Greenwood CCD, Sussex County98% detected of 55
- Red Lion CCD, New Castle County98% detected of 46
- Georgetown CCD, Sussex County97% detected of 77
- New Castle CCD, New Castle County97% detected of 38
- Middletown-Odessa CCD, New Castle County96% detected of 214
- Lewes CCD, Sussex County95% detected of 137
- Central Kent CCD, Kent County92% detected of 38
- Piedmont CCD, New Castle County89% detected of 47
- Dover CCD, Kent County77% detected of 61
Sources
- Individual samples from the USGS Water Quality Portal and state monitoring, summarized per geography. manganese counts and shares are listed on each county and town page with their sources.