Know Your Environment. Protect Your Health.

Arsenic

Kent 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.

 

31

Samples

0

Samples exceeding legal limit (MCL)

16

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.260 ppb51ND - 1.30 ppb
20190.240 ppb102ND - 1.20 ppb
2020N/A00N/A
20210.758 ppb990.160 ppb - 1.90 ppb
20221.04 ppb330.410 ppb - 1.50 ppb
20230.450 ppb41ND - 1.80 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
2018-07-16ND
2018-07-16ND
2018-07-171.30 ppb
2018-08-07ND
2018-08-07ND
2019-07-021.20 ppb
2019-07-02ND
2019-07-02ND
2019-07-12ND
2019-07-12ND
2019-07-16ND
2019-07-16ND
2019-07-22ND
2019-07-22ND
2019-07-231.20 ppb
2021-06-2341808000.390 ppb
2021-06-2341808000.390 ppb
2021-07-1342128880.160 ppb
2021-07-1342128891.30 ppb
2021-07-1342128900.570 ppb
2021-07-1342128900.570 ppb
2021-07-2042001530.770 ppb
2021-07-2042001530.770 ppb
2021-07-2742035661.90 ppb
2022-07-2643294091.50 ppb
2022-07-2643294120.410 ppb
2022-07-2643294051.20 ppb
2023-07-3145111711.80 ppb
2023-07-314511172ND
2023-07-314511173ND
2023-07-314511170ND