Know Your Environment. Protect Your Health.

Arsenic

Heritage Ranch Community Services 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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
20200.667 ppb31ND - 2.00 ppb
2021ND30ND
20220.500 ppb41ND - 2.00 ppb
2023ND40ND

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
2018-05-10CA4010012_001_001-201805101300ND
2018-05-10CA4010012_002_002-201805101306ND
2018-11-01CA4010012_001_001-201811011307ND
2018-11-01CA4010012_002_002-201811011318ND
2019-05-09CA4010012_001_001-201905091217ND
2019-05-09CA4010012_002_002-201905091240ND
2019-11-04CA4010012_001_001-201911041310ND
2019-11-04CA4010012_002_002-201911041315ND
2020-05-07CA4010012_002_002-202005071053ND
2020-05-07CA4010012_001_001-202005071035ND
2020-11-19CA4010012_001_001-2020111913302.00 ppb
2021-06-10CA4010012_001_001-202106101322ND
2021-11-18CA4010012_001_001-202111181020ND
2021-11-18CA4010012_002_002-202111181030ND
2022-05-12CA4010012_001_001-202205120944ND
2022-05-12CA4010012_002_002-202205120953ND
2022-11-03CA4010012_001_001-2022110310532.00 ppb
2022-11-03CA4010012_002_002-202211031059ND
2023-05-18CA4010012_001_001-202305180931ND
2023-05-18CA4010012_002_002-202305180948ND
2023-11-09CA4010012_001_001-202311091019ND
2023-11-09CA4010012_002_002-202311091028ND