Manganese
Mamou Road Water District Inc.
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)
2
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 | 110.0 ppb | 4 | 2 | ND - 220.0 ppb |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 1 | 0 | ND |
| 2022 | 15.0 ppb | 2 | 2 | 10.00 ppb - 20.0 ppb |
| 2023 | ND | 1 | 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 |
|---|---|---|
| 2019-04-22 | B1901698-001 | ND |
| 2019-04-22 | B1901698-002 | 220.0 ppb |
| 2019-04-22 | B1901698-001 | ND |
| 2019-04-22 | B1901698-002 | 220.0 ppb |
| 2021-11-23 | B2106495-001 | ND |
| 2022-05-09 | B2202188-001 | 10.00 ppb |
| 2022-05-09 | B2202188-002 | 20.0 ppb |
| 2023-02-17 | B2300783-001 | ND |