Lead and copper

MS0600007 , City of Marks

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 Marks, 38 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	0.182 mg/l	DS000	Accepted
Lead	Jan 1, 2023 – Dec 31, 2025	10	0.0032 mg/l	DS000	Accepted
Copper	Jan 1, 2020 – Dec 31, 2022	10	0.0655 mg/l	DS000	Accepted
Lead	Jan 1, 2020 – Dec 31, 2022	10	0.0012 mg/l	DS000	Accepted
Copper	Jan 1, 2019 – Dec 31, 2019	11	0.7023 mg/l	DS000	Accepted
Lead	Jan 1, 2019 – Dec 31, 2019	11	0.0097 mg/l	DS000	Accepted
Copper	Jan 1, 2018 – Dec 31, 2018	10	0.1652 mg/l	DS000	Accepted
Lead	Jan 1, 2018 – Dec 31, 2018	10	0.0039 mg/l	DS000	Accepted
Copper	Jan 1, 2017 – Dec 31, 2017	10	0.0545 mg/l	DS000	Accepted
Lead	Jan 1, 2017 – Dec 31, 2017	10	0.0006 mg/l	DS000	Accepted
Copper	Jul 1, 2016 – Dec 31, 2016	20	0.0313 mg/l	DS000	Accepted
Lead	Jul 1, 2016 – Dec 31, 2016	20	0.0009 mg/l	DS000	Accepted
Copper	Jan 1, 2016 – Jun 30, 2016	20	0.0189 mg/l	DS000	Accepted
Lead	Jan 1, 2016 – Jun 30, 2016	20	0.0014 mg/l	DS000	Accepted
Copper	Jul 1, 2015 – Dec 31, 2015	21	0.0146 mg/l	DS000	Accepted
Lead	Jul 1, 2015 – Dec 31, 2015	21	0.001 mg/l	DS000	Accepted
Copper	Jan 1, 2015 – Jun 30, 2015	21	0.0144 mg/l	DS000	Accepted
Lead	Jan 1, 2015 – Jun 30, 2015	21	0.0006 mg/l	DS000	Accepted
Copper	Jan 1, 2012 – Dec 31, 2014	12	0.074 mg/l	DS000	Accepted
Lead	Jan 1, 2012 – Dec 31, 2014	12	0.0207 mg/l	DS000	Accepted
Copper	Jan 1, 2011 – Dec 31, 2013	10	0.2508 mg/l	DS000	Accepted
Lead	Jan 1, 2011 – Dec 31, 2013	10	0.0092 mg/l	DS000	Accepted
Copper	Jan 1, 2009 – Dec 31, 2011	10	0.2508 mg/l	DS000	Accepted
Lead	Jan 1, 2009 – Dec 31, 2011	10	0.0092 mg/l	DS000	Accepted
Copper	Jan 1, 2006 – Dec 31, 2008	12	0.2291 mg/l	DS000	Accepted
Lead	Jan 1, 2006 – Dec 31, 2008	12	0.0072 mg/l	DS000	Accepted
Copper	Jan 1, 2000 – Dec 31, 2002	10	0.152 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	0.465 mg/l	DS000	Accepted
Lead	Jan 1, 1997 – Dec 31, 1999	10	0.005 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1996	10	0.325 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Dec 31, 1996	10	0.007 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	10	0.093 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	10	0.005 mg/l	DS000	Accepted
Copper	Jan 1, 1994 – Jun 30, 1994	20	0.214 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Jun 30, 1994	20	0.004 mg/l	DS000	Accepted
Copper	Jul 1, 1993 – Dec 31, 1993	20	0.079 mg/l	DS000	Accepted
Lead	Jul 1, 1993 – Dec 31, 1993	20	0.006 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.