Manganese
Skagit County Public Utility District 1 Judy Reservoir
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 | ND | 1 | 0 | ND |
| 2020 | 0.870 ppb | 3 | 3 | 0.410 ppb - 1.30 ppb |
| 2021 | ND | 1 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | 1.10 ppb | 2 | 1 | ND - 2.20 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 |
|---|---|---|
| 2019-10-14 | 9J15056-01 | ND |
| 2020-01-13 | 0A14034-01 | 0.410 ppb |
| 2020-04-06 | 0D07026-01 | 1.30 ppb |
| 2020-07-06 | 0G07115-01 | 0.900 ppb |
| 2021-09-09 | 4175228 | ND |
| 2023-05-09 | 4448233 | ND |
| 2023-05-09 | 4448232 | 2.20 ppb |