Arsenic
Middletown Water Department
Arsenic is a potent carcinogen and common contaminant in drinking water. Arsenic causes thousands of cases of cancer each year in the U.S. Click here to read more about arsenic.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 4 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.004 ppb
The EWG Health Guideline of 0.004 ppb for arsenic was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.
EPA Maximum Contaminant
Level (MCL): 10 ppb
The legal limit for arsenic, established in 2001, was based on costs for arsenic removal, as calculated at the time that the standard was set. This limit does not fully protect against the risk of cancer due to arsenic exposure.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-03-01 | IOCR 200489002 | ND |
| 2018-03-01 | IOC1 200489001 | ND |
| 2018-04-16 | IOC1 200492152 | ND |
| 2019-05-13 | IOC1 200531892 | ND |
| 2019-05-13 | IOCR 200531894 | ND |
| 2019-05-21 | IOC1 200533082 | ND |
| 2019-05-21 | IOCR 200533084 | ND |
| 2020-05-06 | IOC1 200574724 | ND |
| 2020-05-06 | IOCR 200574725 | ND |
| 2020-05-14 | IOC1 200575834 | ND |
| 2020-05-14 | IOCR 200575835 | ND |
| 2021-03-30 | IOC1 200611335 | ND |
| 2021-03-30 | IOCR 200611337 | ND |
| 2021-03-30 | IOC1 200611336 | ND |
| 2021-04-07 | IOCR 200612106 | ND |
| 2022-05-11 | E300182524 300182533 | ND |
| 2022-05-11 | E300182526 300182546 | ND |
| 2022-05-11 | I300182528 300182552 | ND |
| 2022-05-11 | I300182529 300182557 | ND |
| 2023-06-23 | E300370712 300370715 | ND |
| 2023-06-23 | E300370718 300370721 | ND |
| 2023-06-23 | I300370724 300370727 | ND |
| 2023-06-23 | I300370731 300370734 | ND |