Manganese
Woodinville Water District
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.
4
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 | 3.43 ppb | 4 | 4 | 1.60 ppb - 6.50 ppb |
| 2019 | 2.40 ppb | 4 | 4 | 0.950 ppb - 6.40 ppb |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | 0.500 ppb | 1 | 1 | 0.500 ppb |
| 2023 | 0.600 ppb | 1 | 1 | 0.600 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 | Lab ID | Result |
|---|---|---|
| 2019-03-12 | B9C1784-01 | 1.30 ppb |
| 2019-06-11 | B9F1489-01 | 6.40 ppb |
| 2019-09-10 | B9I1467-01 | 0.960 ppb |
| 2019-12-10 | B9L1698-01 | 0.950 ppb |