Aluminum

California Water Service Co-lake Hughes

Aluminum is a metal released from metal refineries and mining operations. Too much aluminum exposure can impair children's brain development.

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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	0.734 ppb	1	1	0.734 ppb
2015	ND	2	0	ND
2016	8.44 ppb	7	1	ND - 59.1 ppb
2017	ND	5	0	ND
2018	ND	5	0	ND
2019	ND	6	0	ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 600 ppb

The EWG Health Guideline of 600 ppb for aluminum 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 harm to the brain and nervous system.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-10-01	5701-001-1322	0.734 ppb
2015-07-08	5810-005-1418	ND
2015-07-08	5810-001-1330	ND
2016-04-06	5810-008-1251	ND
2016-04-25	5810-008-1340	ND
2016-04-25	5810-008-1440	ND
2016-07-12	5701-005-1458	ND
2016-10-18	5701-008-1135	ND
2016-11-15	5701-008-1450	ND
2016-11-15	5701-008-1452	59.1 ppb
2017-01-17	5701-008-1442	ND
2017-04-11	5701-008-1315	ND
2017-07-11	5701-008-1145	ND
2017-07-20	5701-008-1530	ND
2017-10-24	5701-008-1431	ND
2018-01-10	5701-008-1559	ND
2018-04-10	5701-008-1436	ND
2018-07-10	5701-008-1238	ND
2018-07-11	5810-001-1431	ND
2018-07-18	5810-005-1313	ND
2019-01-15	5701-008-1326	ND
2019-04-11	5810-008-1230	ND
2019-04-16	5701-008-1141	ND
2019-07-09	5701-008-1145	ND
2019-10-08	5701-008-0948	ND
2019-10-22	5701-008-1040	ND