Manganese
Humboldt, City of
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.
6
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 | 5.00 ppb | 1 | 1 | 5.00 ppb |
| 2019 | 3.40 ppb | 1 | 1 | 3.40 ppb |
| 2020 | 10.00 ppb | 1 | 1 | 10.00 ppb |
| 2021 | 11.0 ppb | 1 | 1 | 11.0 ppb |
| 2022 | 6.30 ppb | 1 | 1 | 6.30 ppb |
| 2023 | 4.20 ppb | 1 | 1 | 4.20 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 |
|---|---|---|
| 2018-04-16 | 938541 | 5.00 ppb |
| 2019-04-08 | 1139841 | 3.40 ppb |
| 2020-04-13 | 1356570 | 10.00 ppb |
| 2021-04-05 | 1810805 | 11.0 ppb |
| 2022-04-04 | 2230076 | 6.30 ppb |
| 2023-04-03 | 2474485 | 4.20 ppb |