Manganese
City of Beaverton
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.
7
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 | 0.300 ppb | 4 | 1 | ND - 1.20 ppb |
| 2019 | 2.31 ppb | 2 | 2 | 0.410 ppb - 4.20 ppb |
| 2020 | ND | 2 | 0 | ND |
| 2021 | 0.500 ppb | 2 | 1 | ND - 1.000 ppb |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 2 | 0 | ND |
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 | Lab ID | Result |
|---|---|---|
| 2018-04-03 | 201804040649 | 1.20 ppb |
| 2018-07-10 | 201807110926 | ND |
| 2018-07-10 | 201807111259 | ND |
| 2018-10-04 | 201810050525 | ND |
| 2019-01-03 | 201901040224 | 4.20 ppb |
| 2019-01-03 | 201901040137 | 0.410 ppb |
| 2022-06-22 | 2173004-02-I | ND |