Lead and copper

MS0300011 , Chevron Usa

Every monitoring period on record is listed here. This page applies no date range. The same list limited to the last two years.

Lead and copper 90th-percentile sample summaries for Chevron Usa, 34 summaries, every one on record. The agency records no date of receipt for any of them.
Analyte	Monitoring period	Samples	90th percentile	Facility	Data quality
Copper	Jan 1, 2022 – Dec 31, 2024	10	0.0748 mg/l	DS000	Accepted
Lead	Jan 1, 2022 – Dec 31, 2024	10	0 mg/l	DS000	Accepted
Copper	Jan 1, 2019 – Dec 31, 2021	10	0.25 mg/l	DS000	Accepted
Lead	Jan 1, 2019 – Dec 31, 2021	10	0.0007 mg/l	DS000	Accepted
Copper	Jan 1, 2016 – Dec 31, 2018	10	0.4492 mg/l	DS000	Accepted
Lead	Jan 1, 2016 – Dec 31, 2018	10	0 mg/l	DS000	Accepted
Copper	Jan 1, 2013 – Dec 31, 2015	10	0.3111 mg/l	DS000	Accepted
Lead	Jan 1, 2013 – Dec 31, 2015	10	0.0007 mg/l	DS000	Accepted
Copper	Jan 1, 2010 – Dec 31, 2012	10	0.1268 mg/l	DS000	Accepted
Lead	Jan 1, 2010 – Dec 31, 2012	10	0.0015 mg/l	DS000	Accepted
Copper	Jan 1, 2009 – Dec 31, 2009	10	0.0772 mg/l	DS000	Accepted
Lead	Jan 1, 2009 – Dec 31, 2009	10	0 mg/l	DS000	Accepted
Copper	Jan 1, 2008 – Dec 31, 2008	10	0.4787 mg/l	DS000	Accepted
Lead	Jan 1, 2008 – Dec 31, 2008	10	0.0044 mg/l	DS000	Accepted
Copper	Jan 1, 2007 – Dec 31, 2007	40	0.114 mg/l	DS000	Accepted
Lead	Jan 1, 2007 – Dec 31, 2007	40	0.0018 mg/l	DS000	Accepted
Copper	Jul 1, 2004 – Dec 31, 2004	20	0.1875 mg/l	DS000	Accepted
Lead	Jul 1, 2004 – Dec 31, 2004	20	0.0026 mg/l	DS000	Accepted
Copper	Jan 1, 2004 – Jun 30, 2004	20	0.385 mg/l	DS000	Accepted
Lead	Jan 1, 2004 – Jun 30, 2004	20	0.0086 mg/l	DS000	Accepted
Copper	Jan 1, 2000 – Jun 30, 2000	20	0.328 mg/l	DS000	Accepted
Lead	Jan 1, 2000 – Jun 30, 2000	20	0.005 mg/l	DS000	Accepted
Copper	Jan 1, 1997 – Jun 30, 1997	10	0.3 mg/l	DS000	Accepted
Lead	Jan 1, 1997 – Jun 30, 1997	10	0.006 mg/l	DS000	Accepted
Copper	Jul 1, 1996 – Dec 31, 1996	20	1.257 mg/l	DS000	Accepted
Lead	Jul 1, 1996 – Dec 31, 1996	20	0.017 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Jun 30, 1996	20	1.106 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Jun 30, 1996	20	0.029 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	22	1.197 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	22	0.017 mg/l	DS000	Accepted
Copper	Jan 1, 1994 – Jun 30, 1994	20	0.758 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Jun 30, 1994	20	0.004 mg/l	DS000	Accepted
Copper	Jul 1, 1993 – Dec 31, 1993	21	0.592 mg/l	DS000	Accepted
Lead	Jul 1, 1993 – Dec 31, 1993	21	0.013 mg/l	DS000	Accepted

No date of receipt is recorded for any of these summaries.

This system’s violations

What the 90th percentile is

The 90th percentile of all samples collected from the distribution system is the standard that the US Environmental Protection Agency has chosen for determining compliance with the Lead and Copper Action Level under the federal Lead and Copper Rule. The 90th percentile is determined by ranking all sample results from lowest to highest and finding a result that is 90% of the number of sample results from the top. For example, if there are 10 sample results, the 90th percentile would be the 9th sample result from the top.

From the help text published with these pages.