Arsenic

City of Newport

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	0.250 ppb	8	2	ND - 1.000 ppb
2015	0.750 ppb	8	4	ND - 2.00 ppb
2016	0.875 ppb	8	4	ND - 2.00 ppb
2017	0.364 ppb	11	3	ND - 2.00 ppb
2018	0.150 ppb	20	2	ND - 2.00 ppb
2019	0.0455 ppb	22	1	ND - 1.000 ppb

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
2014-01-06	1401012-03_WL68	ND
2014-01-06	1401012-08_WL68	ND
2014-05-21	1402793-06_WL68	ND
2014-05-21	1402793-05_WL68	ND
2014-07-02	1403537-01_WL68	ND
2014-07-02	1403537-05_WL68	1.000 ppb
2014-07-02	1403537-04_WL68	1.000 ppb
2014-07-02	1403537-03_WL68	ND
2015-01-12	1501069-03_WL68	ND
2015-01-12	1501069-08_WL68	ND
2015-06-01	1502384-02_WL68	ND
2015-06-01	1502384-01_WL68	ND
2015-07-20	1503232-04_WL68	2.00 ppb
2015-07-20	1503232-06_WL68	1.000 ppb
2015-07-20	1503232-05_WL68	2.00 ppb
2015-07-20	1503232-03_WL68	1.000 ppb
2016-01-11	1600887-08_WL68	ND
2016-01-11	1600887-02_WL68	ND
2016-05-09	1602070-04_WL68	ND
2016-05-09	1602070-05_WL68	ND
2016-07-25	1603626-02_WL68	2.00 ppb
2016-07-25	1603626-04_WL68	2.00 ppb
2016-07-25	1603626-03_WL68	1.000 ppb
2016-07-25	1603626-01_WL68	2.00 ppb
2017-01-24	1701020-02_WL68	ND
2017-01-25	1701027-06_WL68	ND
2017-05-15	1702185-01_WL68	ND
2017-05-15	1702185-02_WL68	ND
2017-05-15	1702185-03_WL68	ND
2017-07-10	1703108-03_WL68	2.00 ppb
2017-07-10	1703108-02_WL68	1.000 ppb
2017-07-10	1703108-01_WL68	1.000 ppb
2017-07-10	1703108-04_WL68	ND
2017-11-14	1704991-01_WL68	ND
2017-11-20	1705061-04_WL68	ND
2018-01-16	1800888-01_WL68	ND
2018-01-16	1800888-02_WL68	ND
2018-01-22	1800936-01_WL68	ND
2018-01-22	1800936-02_WL68	ND
2018-01-22	1800936-07_WL68	ND
2018-06-04	1802314-01_WL68	ND
2018-06-04	1802314-06_WL68	ND
2018-06-04	1802314-02_WL68	ND
2018-06-04	1802314-04_WL68	ND
2018-06-04	1802314-05_WL68	ND
2018-07-17	1803078-03_WL68	2.00 ppb
2018-07-17	1803078-02_WL68	ND
2018-07-17	1803078-04_WL68	1.000 ppb
2018-07-17	1803078-05_WL68	ND
2018-07-17	1803078-06_WL68	ND
2018-07-17	1803078-07_WL68	ND
2018-07-17	1803078-08_WL68	ND
2018-10-01	1804258-03_WL68	ND
2018-10-01	1804258-02_WL68	ND
2018-10-01	1804258-01_WL68	ND
2019-01-15	1900857-05_WL68	ND
2019-01-15	1900857-11_WL68	ND
2019-01-15	1900857-10_WL68	ND
2019-01-15	1900857-04_WL68	ND
2019-01-15	1900857-06_WL68	ND
2019-01-15	1900857-08_WL68	ND
2019-05-07	1901920-03_WL68	ND
2019-05-07	1901920-02_WL68	ND
2019-05-07	1901920-01_WL68	ND
2019-05-07	1901920-05_WL68	ND
2019-05-07	1901920-07_WL68	ND
2019-05-07	1901920-06_WL68	ND
2019-08-06	1903576-04_WL68	ND
2019-08-06	1903576-02_WL68	ND
2019-08-06	1903576-03_WL68	1.000 ppb
2019-08-06	1903576-01_WL68	ND
2019-08-06	1903576-05_WL68	ND
2019-08-06	1903576-06_WL68	ND
2019-08-29	1904072-02_WL68	ND
2019-12-05	1905044-01_WL68	ND
2019-12-05	1905044-03_WL68	ND
2019-12-05	1905044-02_WL68	ND