Manganese in Colorado well water
In Colorado, manganese was detected in 75% of 9,511 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 Colorado 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 Colorado: 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 |
|---|---|---|---|---|---|
| Las Animas | no limit | 60 | 100% | 25 | 3,400 ug/L |
| Prowers | no limit | 35 | 100% | 10 | 1,200 ug/L |
| Bent | no limit | 117 | 100% | 50 | 8050 ug/L |
| Archuleta | no limit | 37 | 95% | 60 | 4,800 ug/L |
| Otero | no limit | 104 | 93% | 20 | 4,900 ug/L |
| Arapahoe | no limit | 1,286 | 91% | 152 | 22,000 ug/L |
| Montrose | no limit | 170 | 91% | 240 | 2,400 ug/L |
| Routt | no limit | 617 | 90% | 60 | 14,000 ug/L |
| Eagle | no limit | 829 | 89% | 300 | 5,100,000 ug/L |
| Delta | no limit | 71 | 89% | 90 | 1,430 ug/L |
| Custer | no limit | 43 | 88% | 1.36 | 400 ug/L |
| Summit | no limit | 40 | 88% | 12.9 | 160,000 ug/L |
| Pueblo | no limit | 241 | 86% | 44.1 | 2,560 ug/L |
| Elbert | no limit | 275 | 85% | 128 | 14,500 ug/L |
| Denver | no limit | 118 | 85% | 1,125 | 8,180 ug/L |
- McClave CCD, Bent County100% detected of 108
- Lamar CCD, Prowers County100% detected of 30
- Grand Junction CCD, Mesa County98% detected of 45
- Montrose CCD, Montrose County95% detected of 40
- Hayden CCD, Routt County95% detected of 531
- Fruita CCD, Mesa County94% detected of 32
- Cheraw CCD, Otero County93% detected of 60
- East Arapahoe CCD, Arapahoe County92% detected of 1,178
- Olathe CCD, Montrose County91% detected of 102
- Pueblo CCD, Pueblo County91% detected of 146
- Minturn-Red Cliff CCD, Eagle County89% detected of 779
- Westcliffe CCD, Custer County88% detected of 43
- South Aurora CCD, Arapahoe County88% detected of 65
- Agate CCD, Elbert County87% detected of 215
- Eagle-Gypsum CCD, Eagle County85% detected of 48
- Denver CCD, Denver County85% detected of 118
- Colorado City-Rye CCD, Pueblo County84% detected of 31
- Fort Morgan CCD, Morgan County83% detected of 36
- Pueblo West CCD, Pueblo County82% detected of 38
- Crested Butte CCD, Gunnison County82% detected of 38
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.