Lead and copper

MS0020001 , Alcorn W/A #2-Biggersville

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 Alcorn W/A #2-Biggersville, 30 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, 2023 – Dec 31, 2025	10	0.139 mg/l	DS000	Accepted
Lead	Jan 1, 2023 – Dec 31, 2025	10	0.0011 mg/l	DS000	Accepted
Copper	Jan 1, 2020 – Dec 31, 2022	10	0.141 mg/l	DS000	Accepted
Lead	Jan 1, 2020 – Dec 31, 2022	10	0.0013 mg/l	DS000	Accepted
Copper	Jan 1, 2017 – Dec 31, 2019	10	0.0583 mg/l	DS000	Accepted
Lead	Jan 1, 2017 – Dec 31, 2019	10	0.0043 mg/l	DS000	Accepted
Copper	Jan 1, 2015 – Dec 31, 2017	10	0.0613 mg/l	DS000	Accepted
Lead	Jan 1, 2015 – Dec 31, 2017	10	0.0021 mg/l	DS000	Accepted
Copper	Jan 1, 2014 – Dec 31, 2016	20	0.0774 mg/l	DS000	Accepted
Lead	Jan 1, 2014 – Dec 31, 2016	20	0.0028 mg/l	DS000	Accepted
Copper	Jan 1, 2012 – Dec 31, 2014	10	0.0774 mg/l	DS000	Accepted
Lead	Jan 1, 2012 – Dec 31, 2014	10	0.0028 mg/l	DS000	Accepted
Copper	Jan 1, 2011 – Dec 31, 2013	10	0.0599 mg/l	DS000	Accepted
Lead	Jan 1, 2011 – Dec 31, 2013	10	0.0053 mg/l	DS000	Accepted
Copper	Jan 1, 2009 – Dec 31, 2011	10	0.0599 mg/l	DS000	Accepted
Lead	Jan 1, 2009 – Dec 31, 2011	10	0.0053 mg/l	DS000	Accepted
Copper	Jan 1, 2006 – Dec 31, 2008	12	0.0701 mg/l	DS000	Accepted
Lead	Jan 1, 2006 – Dec 31, 2008	12	0.0058 mg/l	DS000	Accepted
Copper	Jan 1, 2000 – Dec 31, 2002	10	0.102 mg/l	DS000	Accepted
Lead	Jan 1, 2000 – Dec 31, 2002	10	0.006 mg/l	DS000	Accepted
Copper	Jan 1, 1997 – Dec 31, 1999	10	0.083 mg/l	DS000	Accepted
Lead	Jan 1, 1997 – Dec 31, 1999	10	0.004 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1996	10	0.109 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Dec 31, 1996	10	0 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	10	0.091 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	20	0.129 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Jun 30, 1994	20	0.002 mg/l	DS000	Accepted
Copper	Jul 1, 1993 – Dec 31, 1993	20	0.183 mg/l	DS000	Accepted
Lead	Jul 1, 1993 – Dec 31, 1993	20	0.004 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.