Lead and copper

MS0170024 , City of Horn Lake - Holly Hills

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 - Holly Hills, 24 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	0.0279 mg/l	DS000	Accepted
Lead	Jan 1, 2023 – Dec 31, 2025	10	0 mg/l	DS000	Accepted
Copper	Jan 1, 2020 – Dec 31, 2022	10	0.063 mg/l	DS000	Accepted
Lead	Jan 1, 2020 – Dec 31, 2022	10	0.0014 mg/l	DS000	Accepted
Copper	Jan 1, 2017 – Dec 31, 2019	11	0.0681 mg/l	DS000	Accepted
Lead	Jan 1, 2017 – Dec 31, 2019	11	0 mg/l	DS000	Accepted
Copper	Jan 1, 2015 – Dec 31, 2017	10	0.2777 mg/l	DS000	Accepted
Lead	Jan 1, 2015 – Dec 31, 2017	10	0.0047 mg/l	DS000	Accepted
Copper	Jan 1, 2012 – Dec 31, 2014	12	0.152 mg/l	DS000	Accepted
Lead	Jan 1, 2012 – Dec 31, 2014	12	0.0016 mg/l	DS000	Accepted
Copper	Jan 1, 2009 – Dec 31, 2011	11	0.1975 mg/l	DS000	Accepted
Lead	Jan 1, 2009 – Dec 31, 2011	11	0.0011 mg/l	DS000	Accepted
Copper	Jan 1, 2006 – Dec 31, 2008	12	0.1244 mg/l	DS000	Accepted
Lead	Jan 1, 2006 – Dec 31, 2008	12	0.0016 mg/l	DS000	Accepted
Copper	Jan 1, 2000 – Dec 31, 2002	10	0.281 mg/l	DS000	Accepted
Lead	Jan 1, 2000 – Dec 31, 2002	10	0.003 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1996	10	0.1 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	0.108 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	0.179 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Jun 30, 1994	20	0.003 mg/l	DS000	Accepted
Copper	Jul 1, 1993 – Dec 31, 1993	20	0.256 mg/l	DS000	Accepted
Lead	Jul 1, 1993 – Dec 31, 1993	20	0.002 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.