Manganese
Del Dios Mutual Water Company
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.
7
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 | N/A | 0 | 0 | N/A |
| 2019 | 12.7 ppb | 3 | 1 | ND - 38.0 ppb |
| 2020 | 4.53 ppb | 4 | 4 | 1.90 ppb - 7.10 ppb |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 3 | 0 | ND |
| 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 |
|---|---|---|
| 2019-02-26 | CA3700866_002_002-201902260830 | 38.0 ppb |
| 2019-02-26 | CA3700866_001_001-201902260900 | ND |
| 2019-02-26 | CA3700866_003_003-201902260930 | ND |
| 2021-11-22 | CA3700866_006_006-202111221200 | ND |
| 2022-03-28 | CA3700866_002_002-202203281430 | ND |
| 2022-03-28 | CA3700866_001_001-202203281400 | ND |
| 2022-03-28 | CA3700866_003_003-202203281500 | ND |