Lead and copper

MS0460003 , City of Columbia

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 Columbia, 36 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	20	0.514 mg/l	DS000	Accepted
Lead	Jan 1, 2022 – Dec 31, 2024	20	0.0017 mg/l	DS000	Accepted
Copper	Jan 1, 2019 – Dec 31, 2021	20	0.525 mg/l	DS000	Accepted
Lead	Jan 1, 2019 – Dec 31, 2021	20	0.0015 mg/l	DS000	Accepted
Copper	Jan 1, 2018 – Dec 31, 2018	20	0.2264 mg/l	DS000	Accepted
Lead	Jan 1, 2018 – Dec 31, 2018	20	0.0077 mg/l	DS000	Accepted
Copper	Jan 1, 2017 – Dec 31, 2017	20	0.0936 mg/l	DS000	Accepted
Lead	Jan 1, 2017 – Dec 31, 2017	20	0.0024 mg/l	DS000	Accepted
Copper	Jan 1, 2016 – Dec 31, 2016	20	0.0212 mg/l	DS000	Accepted
Lead	Jan 1, 2016 – Dec 31, 2016	20	0.0015 mg/l	DS000	Accepted
Copper	Jan 1, 2015 – Jun 30, 2015	40	0.074 mg/l	DS000	Accepted
Lead	Jan 1, 2015 – Jun 30, 2015	40	0.001 mg/l	DS000	Accepted
Copper	Jul 1, 2014 – Dec 31, 2014	40	0.5804 mg/l	DS000	Accepted
Lead	Jul 1, 2014 – Dec 31, 2014	40	0.0035 mg/l	DS000	Accepted
Copper	Jan 1, 2014 – Jun 30, 2014	40	0.0533 mg/l	DS000	Accepted
Lead	Jan 1, 2014 – Jun 30, 2014	40	0.0016 mg/l	DS000	Accepted
Copper	Jan 1, 2011 – Dec 31, 2013	20	1.4971 mg/l	DS000	Accepted
Lead	Jan 1, 2011 – Dec 31, 2013	20	0.0084 mg/l	DS000	Accepted
Copper	Jan 1, 2008 – Dec 31, 2010	20	0.014 mg/l	DS000	Accepted
Lead	Jan 1, 2008 – Dec 31, 2010	20	0 mg/l	DS000	Accepted
Copper	Jan 1, 2005 – Dec 31, 2007	21	0.0048 mg/l	DS000	Accepted
Lead	Jan 1, 2005 – Dec 31, 2007	21	0 mg/l	DS000	Accepted
Copper	Jan 1, 2002 – Dec 31, 2004	20	0.0042 mg/l	DS000	Accepted
Lead	Jan 1, 2002 – Dec 31, 2004	20	0 mg/l	DS000	Accepted
Copper	Jan 1, 1999 – Dec 31, 2001	20	0.005 mg/l	DS000	Accepted
Lead	Jan 1, 1999 – Dec 31, 2001	20	0.001 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1998	20	0 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Dec 31, 1998	20	0.002 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	20	0 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	20	0.007 mg/l	DS000	Accepted
Copper	Jan 1, 1994 – Dec 31, 1994	20	0 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Dec 31, 1994	20	0 mg/l	DS000	Accepted
Copper	Jan 1, 1993 – Jun 30, 1993	40	0 mg/l	DS000	Accepted
Lead	Jan 1, 1993 – Jun 30, 1993	40	0.002 mg/l	DS000	Accepted
Copper	Jul 1, 1992 – Dec 31, 1992	41	0 mg/l	DS000	Accepted
Lead	Jul 1, 1992 – Dec 31, 1992	41	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.