Manganese
East Rio Hondo Water Supply Corporation Arroyo City
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.
0
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 | 2.90 ppb | 1 | 1 | 2.90 ppb |
| 2019 | 2.43 ppb | 4 | 3 | ND - 5.00 ppb |
| 2020 | 4.08 ppb | 6 | 6 | 1.10 ppb - 7.60 ppb |
| 2021 | 1.35 ppb | 2 | 2 | 1.20 ppb - 1.50 ppb |
| 2022 | 4.20 ppb | 2 | 2 | 4.00 ppb - 4.40 ppb |
| 2023 | 2.55 ppb | 2 | 2 | 2.40 ppb - 2.70 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 |
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