Manganese
City of Refugio
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.
6
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 | N/A | 0 | 0 | N/A |
| 2020 | 6.73 ppb | 3 | 3 | 1.30 ppb - 10.9 ppb |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | 2.37 ppb | 3 | 3 | 1.20 ppb - 4.40 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 |
|---|---|---|
| 2020-03-12 | AF02499 | 8.00 ppb |
| 2020-03-12 | AF02502 | 1.30 ppb |
| 2020-03-12 | AF02503 | 10.9 ppb |
| 2023-02-16 | AG29235 | 1.20 ppb |
| 2023-02-16 | AG29237 | 4.40 ppb |
| 2023-06-05 | AG42951 | 1.50 ppb |