Lead and copper

MS0170022 , City of Horn Lake

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 City of Horn Lake, 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, 2022 – Dec 31, 2024	30	0.174 mg/l	DS000	Accepted
Lead	Jan 1, 2022 – Dec 31, 2024	30	0.0012 mg/l	DS000	Accepted
Copper	Jan 1, 2019 – Dec 31, 2021	30	0.0686 mg/l	DS000	Accepted
Lead	Jan 1, 2019 – Dec 31, 2021	30	0 mg/l	DS000	Accepted
Copper	Jan 1, 2016 – Dec 31, 2018	30	0.1824 mg/l	DS000	Accepted
Lead	Jan 1, 2016 – Dec 31, 2018	30	0.0018 mg/l	DS000	Accepted
Copper	Jan 1, 2014 – Dec 31, 2016	31	0.1663 mg/l	DS000	Accepted
Lead	Jan 1, 2014 – Dec 31, 2016	31	0.001 mg/l	DS000	Accepted
Copper	Jan 1, 2011 – Dec 31, 2013	31	0.2228 mg/l	DS000	Accepted
Lead	Jan 1, 2011 – Dec 31, 2013	31	0.001 mg/l	DS000	Accepted
Copper	Jan 1, 2008 – Dec 31, 2010	30	0.0998 mg/l	DS000	Accepted
Lead	Jan 1, 2008 – Dec 31, 2010	30	0.0005 mg/l	DS000	Accepted
Copper	Jan 1, 2005 – Dec 31, 2007	31	0.096 mg/l	DS000	Accepted
Lead	Jan 1, 2005 – Dec 31, 2007	31	0.0007 mg/l	DS000	Accepted
Copper	Jan 1, 2002 – Dec 31, 2004	25	0.0687 mg/l	DS000	Accepted
Lead	Jan 1, 2002 – Dec 31, 2004	25	0.0016 mg/l	DS000	Accepted
Copper	Jan 1, 1999 – Dec 31, 2001	20	0.298 mg/l	DS000	Accepted
Lead	Jan 1, 1999 – Dec 31, 2001	20	0.001 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	20	0.076 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	20	0.002 mg/l	DS000	Accepted
Copper	Jan 1, 1994 – Dec 31, 1994	20	0.568 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Dec 31, 1994	20	0.004 mg/l	DS000	Accepted
Copper	Jan 1, 1993 – Jun 30, 1993	40	0.681 mg/l	DS000	Accepted
Lead	Jan 1, 1993 – Jun 30, 1993	40	0.007 mg/l	DS000	Accepted
Copper	Jul 1, 1992 – Dec 31, 1992	81	1.06 mg/l	DS000	Accepted
Lead	Jul 1, 1992 – Dec 31, 1992	81	0.003 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.