Arsenic

Johnson County SUD

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.

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	N/A	0	0	N/A
2015	N/A	0	0	N/A
2016	0.544 ppb	11	6	ND - 1.80 ppb
2017	ND	2	0	ND
2018	N/A	0	0	N/A
2019	ND	10	0	ND

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2016-03-17	Q1611268021	0.920 ppb
2016-03-17	Q1611268020	1.80 ppb
2016-03-17	Q1611268019	0.730 ppb
2016-03-17	Q1611268018	0.880 ppb
2016-03-17	Q1611268017	0.760 ppb
2016-06-01	Q1621680008	ND
2016-06-01	Q1621680007	0.890 ppb
2016-11-21	Q1650944019	ND
2016-11-21	Q1650944004	ND
2016-11-21	Q1650944018	ND
2016-11-21	Q1650944003	ND
2017-02-14	Q1706687011	ND
2017-05-04	Q1718433001	ND
2019-02-20	Q1907529012	ND
2019-02-20	Q1907529031	ND
2019-02-20	Q1907529011	ND
2019-02-20	Q1907529030	ND
2019-02-20	Q1907529010	ND
2019-02-20	Q1907529009	ND
2019-02-20	Q1907529029	ND
2019-05-21	Q1927429008	ND
2019-05-21	Q1927429010	ND
2019-05-21	Q1927429009	ND