Lead and copper

MS0440003 , Columbus Light & Water

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 Columbus Light & Water, 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	0.0293 mg/l	DS000	Accepted
Lead	Jan 1, 2022 – Dec 31, 2024	30	0.0005 mg/l	DS000	Accepted
Copper	Jan 1, 2019 – Dec 31, 2021	30	0.0275 mg/l	DS000	Accepted
Lead	Jan 1, 2019 – Dec 31, 2021	30	0.0006 mg/l	DS000	Accepted
Copper	Jan 1, 2016 – Dec 31, 2018	32	0.0205 mg/l	DS000	Accepted
Lead	Jan 1, 2016 – Dec 31, 2018	32	0 mg/l	DS000	Accepted
Copper	Jan 1, 2014 – Dec 31, 2016	33	0.0198 mg/l	DS000	Accepted
Lead	Jan 1, 2014 – Dec 31, 2016	33	0 mg/l	DS000	Accepted
Copper	Jan 1, 2011 – Dec 31, 2013	32	0.0242 mg/l	DS000	Accepted
Lead	Jan 1, 2011 – Dec 31, 2013	32	0 mg/l	DS000	Accepted
Copper	Jan 1, 2008 – Dec 31, 2010	31	0.0407 mg/l	DS000	Accepted
Lead	Jan 1, 2008 – Dec 31, 2010	31	0.0007 mg/l	DS000	Accepted
Copper	Jan 1, 2005 – Dec 31, 2007	30	0.0231 mg/l	DS000	Accepted
Lead	Jan 1, 2005 – Dec 31, 2007	30	0.0007 mg/l	DS000	Accepted
Copper	Jan 1, 2002 – Dec 31, 2004	32	0.0223 mg/l	DS000	Accepted
Lead	Jan 1, 2002 – Dec 31, 2004	32	0.0007 mg/l	DS000	Accepted
Copper	Jan 1, 1999 – Dec 31, 2001	30	0.026 mg/l	DS000	Accepted
Lead	Jan 1, 1999 – Dec 31, 2001	30	0.001 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	31	0 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	31	0.001 mg/l	DS000	Accepted
Copper	Jan 1, 1994 – Dec 31, 1994	30	0 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Dec 31, 1994	30	0.001 mg/l	DS000	Accepted
Copper	Jan 1, 1993 – Jun 30, 1993	61	0.043 mg/l	DS000	Accepted
Lead	Jan 1, 1993 – Jun 30, 1993	61	0.001 mg/l	DS000	Accepted
Copper	Jul 1, 1992 – Dec 31, 1992	60	0 mg/l	DS000	Accepted
Lead	Jul 1, 1992 – Dec 31, 1992	60	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.