Manganese
City of Rio Hondo
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 | 4.80 ppb | 1 | 1 | 4.80 ppb |
| 2019 | 1.80 ppb | 1 | 1 | 1.80 ppb |
| 2020 | 1.70 ppb | 1 | 1 | 1.70 ppb |
| 2021 | 3.40 ppb | 1 | 1 | 3.40 ppb |
| 2022 | 11.1 ppb | 1 | 1 | 11.1 ppb |
| 2023 | 3.70 ppb | 1 | 1 | 3.70 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 |
|---|---|---|
| 2018-04-25 | AE23872 | 4.80 ppb |
| 2019-04-04 | AE61152 | 1.80 ppb |
| 2020-03-06 | AF01655 | 1.70 ppb |
| 2021-04-29 | AF51845 | 3.40 ppb |
| 2022-02-03 | AF83130 | 11.1 ppb |
| 2023-02-01 | AG27065 | 3.70 ppb |