Lead and copper

MS0570004 , City of McComb

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 McComb, 28 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	28	0.649 mg/l	DS000	Accepted
Lead	Jan 1, 2023 – Dec 31, 2025	28	0.0056 mg/l	DS000	Accepted
Copper	Jan 1, 2020 – Dec 31, 2022	30	0.2 mg/l	DS000	Accepted
Lead	Jan 1, 2020 – Dec 31, 2022	30	0.0019 mg/l	DS000	Accepted
Copper	Jan 1, 2017 – Dec 31, 2019	30	0.3888 mg/l	DS000	Accepted
Lead	Jan 1, 2017 – Dec 31, 2019	30	0.0061 mg/l	DS000	Accepted
Copper	Jan 1, 2014 – Dec 31, 2016	30	0.0859 mg/l	DS000	Accepted
Lead	Jan 1, 2014 – Dec 31, 2016	30	0.0018 mg/l	DS000	Accepted
Copper	Jan 1, 2011 – Dec 31, 2013	34	0.1256 mg/l	DS000	Accepted
Lead	Jan 1, 2011 – Dec 31, 2013	34	0.003 mg/l	DS000	Accepted
Copper	Jan 1, 2008 – Dec 31, 2010	30	0.1998 mg/l	DS000	Accepted
Lead	Jan 1, 2008 – Dec 31, 2010	30	0.0013 mg/l	DS000	Accepted
Copper	Jan 1, 2005 – Dec 31, 2007	30	0.468 mg/l	DS000	Accepted
Lead	Jan 1, 2005 – Dec 31, 2007	30	0.005 mg/l	DS000	Accepted
Copper	Jan 1, 2002 – Dec 31, 2004	30	0.2131 mg/l	DS000	Accepted
Lead	Jan 1, 2002 – Dec 31, 2004	30	0.0026 mg/l	DS000	Accepted
Copper	Jan 1, 1999 – Dec 31, 2001	30	0.201 mg/l	DS000	Accepted
Lead	Jan 1, 1999 – Dec 31, 2001	30	0.003 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1998	31	0.228 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Dec 31, 1998	31	0.002 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	30	0.261 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	30	0.004 mg/l	DS000	Accepted
Copper	Jan 1, 1994 – Dec 31, 1994	30	0.108 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Dec 31, 1994	30	0.003 mg/l	DS000	Accepted
Copper	Jan 1, 1993 – Jun 30, 1993	61	0.11 mg/l	DS000	Accepted
Lead	Jan 1, 1993 – Jun 30, 1993	61	0.004 mg/l	DS000	Accepted
Copper	Jul 1, 1992 – Dec 31, 1992	60	0.22 mg/l	DS000	Accepted
Lead	Jul 1, 1992 – Dec 31, 1992	60	0.005 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.