Manganese
SNO PUD 1 - Lake Stevens
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.
8
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 | 7.00 ppb | 1 | 1 | 7.00 ppb |
| 2019 | 0.975 ppb | 6 | 5 | ND - 2.20 ppb |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | 8.70 ppb | 1 | 1 | 8.70 ppb |
| 2023 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2018-07-25 | 7.00 ppb | |
| 2019-01-22 | 19-02669-5700 | 0.900 ppb |
| 2019-01-22 | 19-02669-5701 | ND |
| 2019-04-11 | 19-12542-25460 | 0.800 ppb |
| 2019-07-23 | 19-27105-52792 | 0.850 ppb |
| 2019-07-23 | 19-27105-52793 | 2.20 ppb |
| 2019-10-03 | 19-38233-74199 | 1.10 ppb |
| 2022-06-15 | 4296870 | 8.70 ppb |