Manganese
Madera Co. Sa16 Sumner Hill-water System
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)
4
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 450.0 ppb | 1 | 1 | 450.0 ppb |
| 2019 | 220.0 ppb | 1 | 1 | 220.0 ppb |
| 2020 | 16.0 ppb | 1 | 1 | 16.0 ppb |
| 2021 | 11.0 ppb | 1 | 1 | 11.0 ppb |
| 2022 | 120.0 ppb | 1 | 1 | 120.0 ppb |
| 2023 | 75.5 ppb | 2 | 2 | 21.0 ppb - 130.0 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 |
|---|---|---|
| 2018-01-09 | CA2000729_001_001-201801090930 | 450.0 ppb |
| 2019-01-22 | CA2000729_001_001-201901220945 | 220.0 ppb |
| 2020-01-30 | CA2000729_001_001-202001301100 | 16.0 ppb |
| 2021-01-20 | CA2000729_001_001-202101201030 | 11.0 ppb |
| 2022-01-25 | CA2000729_001_001-202201250835 | 120.0 ppb |
| 2023-03-22 | CA2000729_001_001-202303221150 | 130.0 ppb |
| 2023-07-18 | CA2000729_001_001-202307181000 | 21.0 ppb |