Manganese
Columbia Power and Water System
Manganese is a naturally occurring element that is common in food and drinking water. Excessive manganese exposures may impair children's attention, memory and intellectual capacity. Click here to read more about manganese.
5
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 0.675 ppb | 2 | 2 | 0.580 ppb - 0.770 ppb |
| 2019 | 0.565 ppb | 2 | 2 | 0.410 ppb - 0.720 ppb |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | 11.2 ppb | 1 | 1 | 11.2 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 100 ppb
The EWG Health Guideline of 100 ppb for manganese was defined by the state of Minnesota as a health risk limit, the concentration of a contaminant that can be consumed with little or no risk to health. This health guideline protects against harm to the brain and nervous system.
ppb = parts per billion
All test results
| Date | Result |
|---|---|
| 2018-09-13 | 0.580 ppb |
| 2018-11-13 | 0.770 ppb |
| 2019-02-18 | 0.720 ppb |
| 2019-05-14 | 0.410 ppb |
| 2023-05-11 | 11.2 ppb |