Manganese in Connecticut well water
In Connecticut, manganese was detected in 95% of 2,087 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 Connecticut 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 Connecticut: 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 |
|---|---|---|---|---|---|
| Greater Bridgeport | no limit | 44 | 100% | 60 | 13,000 ug/L |
| Lower Connecticut River Valley | no limit | 134 | 100% | 12.5 | 58,000 ug/L |
| Southeastern Connecticut | no limit | 324 | 100% | 20 | 9,280 ug/L |
| Northeastern Connecticut | no limit | 103 | 99% | 10 | 3,400 ug/L |
| South Central Connecticut | no limit | 152 | 99% | 0 | 4,700 ug/L |
| Naugatuck Valley | no limit | 290 | 97% | 30 | 15,800 ug/L |
| Northwest Hills | no limit | 169 | 96% | 20 | 740 ug/L |
| Western Connecticut | no limit | 219 | 94% | 30 | 29,000 ug/L |
| Capitol | no limit | 652 | 90% | 7.8 | 38,000 ug/L |
- Simsbury, Capitol Planning Region100% detected of 36
- Newtown, Western Connecticut Planning Region100% detected of 30
- East Lyme, Southeastern Connecticut Planning Region100% detected of 106
- Stonington, Southeastern Connecticut Planning Region100% detected of 30
- Waterbury, Naugatuck Valley Planning Region100% detected of 30
- Southington, Capitol Planning Region100% detected of 38
- Farmington, Capitol Planning Region100% detected of 38
- Avon, Capitol Planning Region97% detected of 38
- Granby, Capitol Planning Region97% detected of 37
- Woodbury, Naugatuck Valley Planning Region96% detected of 129
- Wilton, Western Connecticut Planning Region81% detected of 63
- Manchester, Capitol Planning Region69% detected of 157
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.