Know Your Environment. Protect Your Health.

Arsenic

Solano Irrigation District - Pleasant Hills Ranch

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.450 ppb61ND - 2.70 ppb
2019ND30ND
2020ND20ND
2021ND10ND
20222.35 ppb222.30 ppb - 2.40 ppb
2023ND10ND

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
2018-05-10CA4810025_004_005-2018051010002.70 ppb
2018-05-10CA4810025_004_004-201805101015ND
2018-08-23CA4810025_004_005-201808230945ND
2018-08-23CA4810025_004_004-201808230920ND
2018-11-15CA4810025_004_005-201811151110ND
2018-11-15CA4810025_004_004-201811151120ND
2019-03-12CA4810025_002_002-201903120905ND
2019-03-18CA4810025_001_001-201903181000ND
2019-03-18CA4810025_004_005-201903181000ND
2020-03-10CA4810025_002_002-202003100815ND
2020-03-17CA4810025_004_005-202003170905ND
2021-03-23CA4810025_004_005-202103231040ND
2022-03-15CA4810025_002_002-2022031507372.30 ppb
2022-03-15CA4810025_004_005-2022031511002.40 ppb
2023-03-23CA4810025_004_005-202303230940ND