Know Your Environment. Protect Your Health.

Arsenic

Meridian 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.

 

66

Samples

1

Samples exceeding legal limit (MCL)

29

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.887 ppb2311ND - 4.40 ppb
20193.90 ppb223.60 ppb - 4.20 ppb
20202.56 ppb229ND - 38.0 ppb
20210.333 ppb31ND - 1.000 ppb
2022ND30ND
20231.17 ppb136ND - 4.90 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 Lab ID Result
2018-03-26I2018003270667ND
2018-03-26I2018003270688ND
2018-03-26I20180032706701.10 ppb
2018-03-26I2018032706871.20 ppb
2018-03-26I2018003270671ND
2018-03-26I2018003270680ND
2018-03-26I2018003270686ND
2018-03-26I2018003270668ND
2018-03-26I2018003270682ND
2018-03-26I20180032706731.30 ppb
2018-03-26I2018003270666ND
2018-03-26I2018003270669ND
2018-03-26I2018003270665ND
2018-03-26I2018003270685ND
2018-03-26I20180032706754.40 ppb
2018-03-26I20180032706831.30 ppb
2018-03-26I20180032706841.10 ppb
2018-03-26I20180032706743.00 ppb
2018-03-26I20180032706812.20 ppb
2018-03-26I20180032706721.80 ppb
2018-03-26I2018003270689ND
2018-04-10I2018041203111.60 ppb
2018-06-12I2018061311441.40 ppb
2019-04-092019041001023.60 ppb
2019-12-102019121106804.20 ppb
2020-03-102020031102532.70 ppb
2020-03-10202003110242ND
2020-03-17202003180487ND
2020-03-172020031804453.80 ppb
2020-03-172020031803414.40 ppb
2020-03-1820200319016938.0 ppb
2020-04-07202004080558ND
2020-04-07202004080530ND
2020-04-14202004160513ND
2020-04-14202004150455ND
2020-08-05202008060243ND
2020-08-06202008070395ND
2020-08-062020080704242.70 ppb
2020-08-062020080704291.20 ppb
2020-08-132020081401951.20 ppb
2020-08-24202008260647ND
2020-08-26202008280065ND
2020-11-232020112403421.10 ppb
2020-11-23202011240344ND
2020-11-24202011250284ND
2020-11-242020112502751.30 ppb
2020-12-02202012030482ND
2021-01-20202101210294ND
2021-07-21202107220276ND
2021-11-162021111706841.000 ppb
2022-02-22202202231261ND
2022-03-01202203020994ND
2022-11-16380-28732-1ND
2023-08-01380-57235-1ND
2023-08-02380-57464-1ND
2023-08-07380-57977-1ND
2023-08-07380-57974-11.30 ppb
2023-08-07380-57897-1ND
2023-08-07380-57894-11.20 ppb
2023-08-07380-57899-11.20 ppb
2023-08-09380-58355-1ND
2023-08-09380-58481-1ND
2023-08-09380-58496-1ND
2023-08-10380-58742-12.60 ppb
2023-09-26380-64488-14.90 ppb
2023-09-26380-64427-14.00 ppb