Manganese
Marchi Central Farm
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.
9
Samples
0
Samples exceeding legal limit (MCL)
1
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | 49.0 ppb | 1 | 1 | 49.0 ppb |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | 38.0 ppb | 3 | 2 | ND - 73.0 ppb |
| 2023 | 76.4 ppb | 5 | 5 | 21.0 ppb - 240.0 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 |
|---|---|---|
| 2019-06-04 | CA4100551_008_008-201906041715 | 49.0 ppb |
| 2022-06-28 | CA4100551_008_008-202206280800 | 73.0 ppb |
| 2022-09-06 | CA4100551_008_008-202209060720 | 41.0 ppb |
| 2022-11-15 | CA4100551_008_008-202211150800 | ND |
| 2023-01-19 | CA4100551_008_008-202301190730 | 24.0 ppb |
| 2023-07-13 | CA4100551_008_008-202307130710 | 240.0 ppb |
| 2023-08-16 | CA4100551_008_008-202308160800 | 25.0 ppb |
| 2023-09-17 | CA4100551_008_008-202309170700 | 21.0 ppb |
| 2023-12-12 | CA4100551_008_008-202312121203 | 72.0 ppb |