Manganese in Maryland well water
In Maryland, manganese was detected in 83% of 4,799 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 Maryland 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 Maryland: 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 |
|---|---|---|---|---|---|
| Baltimore | no limit | 30 | 100% | 689 | 100,000 ug/L |
| Kent | no limit | 304 | 98% | 24.1 | 2,900 ug/L |
| Worcester | no limit | 475 | 96% | 91 | 1,630 ug/L |
| Queen Anne's | no limit | 226 | 95% | 43.1 | 5,700 ug/L |
| Garrett | no limit | 316 | 95% | 65.3 | 18,500 ug/L |
| Somerset | no limit | 129 | 95% | 30 | 13,000 ug/L |
| Cecil | no limit | 171 | 94% | 30 | 222,000 ug/L |
| Dorchester | no limit | 134 | 93% | 28.1 | 9,900 ug/L |
| Howard | no limit | 177 | 90% | 11 | 2,400 ug/L |
| Anne Arundel | no limit | 372 | 90% | 50 | 2,200 ug/L |
| St. Mary's | no limit | 184 | 85% | 0 | 3,700 ug/L |
| Caroline | no limit | 100 | 85% | 30 | 250 ug/L |
| Wicomico | no limit | 135 | 84% | 30 | 1,400 ug/L |
| Talbot | no limit | 76 | 83% | 2.23 | 298 ug/L |
| Allegany | no limit | 48 | 79% | 185 | 1,540 ug/L |
- District 3, Sunderland, Calvert County100% detected of 32
- Baltimore, Baltimore County100% detected of 30
- District 1, Anne Arundel County100% detected of 32
- District 7, Ocean, Worcester County100% detected of 258
- District 2, Prince Frederick, Calvert County100% detected of 66
- District 14, Willards, Wicomico County100% detected of 56
- District 1, Cecilton, Cecil County99% detected of 77
- District 8, Red House, Garrett County99% detected of 212
- District 2, Kennedyville, Kent County98% detected of 223
- District 3, Sinepuxent, Worcester County98% detected of 50
- District 1, Dixon, Queen Anne's County98% detected of 83
- District 4, Kent Island, Queen Anne's County96% detected of 84
- District 6, Northern, Worcester County95% detected of 37
- District 4, Lisbon, Howard County94% detected of 34
- District 5, Clarksville, Howard County93% detected of 88
- District 6, Anne Arundel County92% detected of 93
- District 5, Anne Arundel County91% detected of 79
- District 4, Western, Worcester County91% detected of 86
- District 8, Hampstead, Carroll County90% detected of 49
- District 7, Cambridge, Dorchester County89% detected of 35
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.