Arsenic

Whispering Pines Inn

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	0.600 ppb	10	4	ND - 3.00 ppb
2015	8.60 ppb	15	11	ND - 50.0 ppb
2016	0.667 ppb	12	8	ND - 1.000 ppb
2017	0.364 ppb	11	2	ND - 3.00 ppb
2018	0.877 ppb	13	1	ND - 11.4 ppb
2019	0.658 ppb	12	3	ND - 4.40 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
2014-02-05	2385-003-1105	ND
2014-03-19	2385-003-1017	ND
2014-04-10	2385-003-1018	ND
2014-05-13	2385-003-1030	ND
2014-06-09	2385-003-1102	1.000 ppb
2014-07-02	2385-003-1015	1.000 ppb
2014-08-06	2385-003-1010	ND
2014-09-15	2385-003-1100	3.00 ppb
2014-10-08	2385-003-1010	ND
2014-11-12	2385-003-0905	1.000 ppb
2015-01-06	2385-003-0945	1.000 ppb
2015-02-11	2385-003-1202	1.000 ppb
2015-03-19	2385-003-0943	1.000 ppb
2015-04-06	2385-003-1346	46.0 ppb
2015-04-23	2385-003-1155	1.000 ppb
2015-05-12	2385-003-1050	ND
2015-06-10	2385-001-0920	50.0 ppb
2015-06-10	2385-003-0924	1.000 ppb
2015-07-01	2385-003-1136	25.0 ppb
2015-07-20	2385-003-1335	ND
2015-08-25	2385-003-1026	1.000 ppb
2015-09-02	2385-003-1109	ND
2015-10-29	2385-003-0835	1.000 ppb
2015-11-10	2385-003-1105	1.000 ppb
2015-12-09	2385-003-1017	ND
2016-01-12	2385-003-1040	1.000 ppb
2016-02-04	2385-003-1123	ND
2016-03-16	2385-003-0952	1.000 ppb
2016-04-06	2385-003-1055	1.000 ppb
2016-05-24	2385-003-1034	1.000 ppb
2016-06-07	2385-003-1010	1.000 ppb
2016-07-26	2385-003-0833	1.000 ppb
2016-08-23	2385-003-1311	1.000 ppb
2016-09-14	2385-003-1245	ND
2016-10-13	2385-003-1020	ND
2016-11-22	2385-003-1154	ND
2016-12-07	2385-003-0938	1.000 ppb
2017-01-03	5810-003-1246	ND
2017-02-14	2385-003-1216	3.00 ppb
2017-03-22	2385-003-1053	ND
2017-05-15	2385-003-1158	ND
2017-06-19	2385-003-1214	ND
2017-07-06	2385-003-1059	ND
2017-08-30	2385-003-1445	1.000 ppb
2017-09-20	2385-003-1222	ND
2017-10-24	2385-003-1100	ND
2017-11-15	2385-003-1230	ND
2017-12-14	2385-003-1515	ND
2018-01-03	2385-003-0940	ND
2018-02-21	2385-003-1110	ND
2018-03-21	2385-003-1045	ND
2018-04-25	2385-003-1417	ND
2018-05-14	2385-003-1200	11.4 ppb
2018-06-13	2385-003-1035	ND
2018-07-25	2385-003-1140	ND
2018-08-22	2385-003-1110	ND
2018-09-26	2385-003-1425	ND
2018-09-26	2385-001-1245	ND
2018-10-17	2385-003-1325	ND
2018-11-19	2385-003-1035	ND
2018-12-20	2385-003-1210	ND
2019-01-16	2385-003-1117	ND
2019-02-20	2385-003-1117	ND
2019-03-20	2385-003-1534	0.600 ppb
2019-04-17	2385-003-1106	ND
2019-05-22	2385-003-1055	ND
2019-06-20	2385-003-1510	ND
2019-07-19	2385-003-0945	ND
2019-08-14	2385-003-1305	4.40 ppb
2019-09-23	2385-003-1605	ND
2019-10-23	2385-003-1420	ND
2019-11-20	2385-003-1055	2.90 ppb
2019-12-19	2385-003-1040	ND