Lead and copper

MS0110011 , Entergy Operations, Inc

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 Entergy Operations, Inc, 26 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, 2020 – Dec 31, 2022	10	0.0031 mg/l	DS000	Accepted
Lead	Jan 1, 2020 – Dec 31, 2022	10	0 mg/l	DS000	Accepted
Copper	Jan 1, 2017 – Dec 31, 2019	11	0.055 mg/l	DS000	Accepted
Lead	Jan 1, 2017 – Dec 31, 2019	11	0.0005 mg/l	DS000	Accepted
Copper	Jan 1, 2015 – Dec 31, 2017	10	0.007 mg/l	DS000	Accepted
Lead	Jan 1, 2015 – Dec 31, 2017	10	0 mg/l	DS000	Accepted
Copper	Jan 1, 2012 – Dec 31, 2014	12	0.114 mg/l	DS000	Accepted
Lead	Jan 1, 2012 – Dec 31, 2014	12	0.0034 mg/l	DS000	Accepted
Copper	Jan 1, 2011 – Dec 31, 2013	10	0.1282 mg/l	DS000	Accepted
Lead	Jan 1, 2011 – Dec 31, 2013	10	0.0025 mg/l	DS000	Accepted
Copper	Jan 1, 2009 – Dec 31, 2011	10	0.1282 mg/l	DS000	Accepted
Lead	Jan 1, 2009 – Dec 31, 2011	10	0.0025 mg/l	DS000	Accepted
Copper	Jan 1, 2006 – Dec 31, 2008	10	0.1167 mg/l	DS000	Accepted
Lead	Jan 1, 2006 – Dec 31, 2008	10	0.0054 mg/l	DS000	Accepted
Copper	Jan 1, 2000 – Dec 31, 2002	10	0.063 mg/l	DS000	Accepted
Lead	Jan 1, 2000 – Dec 31, 2002	10	0 mg/l	DS000	Accepted
Copper	Jan 1, 1997 – Dec 31, 1999	11	0.191 mg/l	DS000	Accepted
Lead	Jan 1, 1997 – Dec 31, 1999	11	0.004 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1996	10	0.114 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Dec 31, 1996	10	0.002 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	10	0.285 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	10	0.002 mg/l	DS000	Accepted
Copper	Jan 1, 1994 – Jun 30, 1994	22	1.131 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Jun 30, 1994	22	0.005 mg/l	DS000	Accepted
Copper	Jul 1, 1993 – Dec 31, 1993	30	0.913 mg/l	DS000	Accepted
Lead	Jul 1, 1993 – Dec 31, 1993	30	0.011 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.