Manganese in Oregon well water
In Oregon, manganese was detected in 94% of 7,247 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 Oregon 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 Oregon: 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 |
|---|---|---|---|---|---|
| Malheur | no limit | 444 | 100% | 73.2 | 2,900 ug/L |
| Benton | no limit | 225 | 100% | 92.2 | 16,400 ug/L |
| Clatsop | no limit | 254 | 100% | 10.3 | 4,600 ug/L |
| Columbia | no limit | 117 | 100% | 54 | 68,000 ug/L |
| Crook | no limit | 31 | 100% | 38 | 5,700 ug/L |
| Curry | no limit | 61 | 100% | 158 | 6,090 ug/L |
| Union | no limit | 55 | 100% | 90.1 | 21,300 ug/L |
| Tillamook | no limit | 189 | 99% | 160 | 25,000 ug/L |
| Coos | no limit | 124 | 98% | 80 | 111,000 ug/L |
| Klamath | no limit | 184 | 98% | 100 | 13,100 ug/L |
| Gilliam | no limit | 74 | 97% | 3.78 | 5,810 ug/L |
| Marion | no limit | 713 | 97% | 1,199 | 51,000 ug/L |
| Washington | no limit | 166 | 97% | 720 | 15,700 ug/L |
| Yamhill | no limit | 321 | 97% | 419 | 35,000 ug/L |
| Lane | no limit | 264 | 97% | 160 | 26,000 ug/L |
- Newport CCD, Lincoln County100% detected of 111
- Southeast Jackson CCD, Jackson County100% detected of 39
- Drewsey CCD, Harney County100% detected of 53
- Dayton-Amity CCD, Yamhill County100% detected of 74
- Tillamook CCD, Tillamook County100% detected of 151
- Prineville CCD, Crook County100% detected of 30
- Astoria CCD, Clatsop County100% detected of 224
- McMinnville CCD, Yamhill County100% detected of 171
- Hubbard CCD, Marion County100% detected of 225
- North Benton CCD, Benton County100% detected of 206
- Klamath Falls CCD, Klamath County100% detected of 104
- Ontario CCD, Malheur County100% detected of 141
- Malheur Junction CCD, Malheur County100% detected of 80
- Owyhee CCD, Malheur County100% detected of 62
- Nyssa CCD, Malheur County100% detected of 55
- Dead Ox Flat CCD, Malheur County100% detected of 68
- La Grande CCD, Union County100% detected of 49
- Pleasant Hill CCD, Lane County100% detected of 131
- Port Orford CCD, Curry County100% detected of 49
- Scappoose CCD, Columbia County100% detected of 96
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.