Know Your Environment. Protect Your Health.

Arsenic

Hillcrest Water District

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.

 

100

Samples

0

Samples exceeding legal limit (MCL)

9

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.950 ppb182ND - 9.00 ppb
20191.27 ppb183ND - 9.50 ppb
20200.518 ppb171ND - 8.80 ppb
20210.482 ppb171ND - 8.20 ppb
20220.494 ppb171ND - 8.40 ppb
20230.608 ppb131ND - 7.90 ppb

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 Result
2018-03-27ND
2018-03-279.00 ppb
2018-03-27ND
2018-03-27ND
2018-03-278.10 ppb
2018-03-27ND
2018-06-13ND
2018-06-13ND
2018-06-13ND
2018-06-13ND
2018-09-18ND
2018-09-18ND
2018-09-18ND
2018-09-18ND
2018-12-18ND
2018-12-18ND
2018-12-18ND
2018-12-18ND
2019-02-288.00 ppb
2019-02-28ND
2019-02-28ND
2019-02-28ND
2019-02-289.50 ppb
2019-02-28ND
2019-05-28ND
2019-05-285.40 ppb
2019-05-28ND
2019-05-28ND
2019-09-05ND
2019-09-05ND
2019-09-05ND
2019-09-05ND
2019-12-12ND
2019-12-12ND
2019-12-12ND
2019-12-12ND
2020-02-258.80 ppb
2020-02-25ND
2020-02-25ND
2020-02-25ND
2020-02-25ND
2020-06-24ND
2020-06-24ND
2020-06-24ND
2020-06-24ND
2020-09-15ND
2020-09-15ND
2020-09-15ND
2020-09-15ND
2020-10-22ND
2020-10-22ND
2020-10-22ND
2020-10-22ND
2021-01-28ND
2021-01-28ND
2021-01-288.20 ppb
2021-01-28ND
2021-01-28ND
2021-06-16ND
2021-06-16ND
2021-06-16ND
2021-06-16ND
2021-08-25ND
2021-08-25ND
2021-08-25ND
2021-08-25ND
2021-12-08ND
2021-12-08ND
2021-12-08ND
2021-12-08ND
2022-03-29ND
2022-03-29ND
2022-03-29ND
2022-03-298.40 ppb
2022-03-29ND
2022-05-12ND
2022-05-12ND
2022-05-12ND
2022-05-12ND
2022-09-23ND
2022-09-23ND
2022-09-23ND
2022-09-23ND
2022-12-08ND
2022-12-08ND
2022-12-08ND
2022-12-08ND
2023-02-14ND
2023-02-147.90 ppb
2023-02-14ND
2023-02-14ND
2023-02-14ND
2023-05-10ND
2023-05-10ND
2023-07-27ND
2023-07-27ND
2023-07-27ND
2023-07-27ND
2023-12-18ND
2023-12-18ND