Lead and copper

MS0820004 , Central Yazoo #1 Fletchers CH.

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 Central Yazoo #1 Fletchers CH., 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, 2021 – Dec 31, 2023	10	0.168 mg/l	DS000	Accepted
Lead	Jan 1, 2021 – Dec 31, 2023	10	0.0007 mg/l	DS000	Accepted
Copper	Jan 1, 2018 – Dec 31, 2020	10	0.1441 mg/l	DS000	Accepted
Lead	Jan 1, 2018 – Dec 31, 2020	10	0.0009 mg/l	DS000	Accepted
Copper	Jan 1, 2015 – Dec 31, 2017	11	0.2765 mg/l	DS000	Accepted
Lead	Jan 1, 2015 – Dec 31, 2017	11	0.004 mg/l	DS000	Accepted
Copper	Jan 1, 2012 – Dec 31, 2014	11	0.5894 mg/l	DS000	Accepted
Lead	Jan 1, 2012 – Dec 31, 2014	11	0.002 mg/l	DS000	Accepted
Copper	Jan 1, 2009 – Dec 31, 2011	10	0.5356 mg/l	DS000	Accepted
Lead	Jan 1, 2009 – Dec 31, 2011	10	0.0024 mg/l	DS000	Accepted
Copper	Jan 1, 2006 – Dec 31, 2008	23	0.5095 mg/l	DS000	Accepted
Lead	Jan 1, 2006 – Dec 31, 2008	23	0.0016 mg/l	DS000	Accepted
Copper	Jan 1, 2003 – Dec 31, 2005	10	0.3907 mg/l	DS000	Accepted
Lead	Jan 1, 2003 – Dec 31, 2005	10	0.0029 mg/l	DS000	Accepted
Copper	Jan 1, 2000 – Dec 31, 2000	10	0.349 mg/l	DS000	Accepted
Lead	Jan 1, 2000 – Dec 31, 2000	10	0.002 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1996	7	0.554 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Dec 31, 1996	7	0.003 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	10	0.206 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	10	0.004 mg/l	DS000	Accepted
Copper	Jan 1, 1994 – Jun 30, 1994	20	0.658 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	21	0.79 mg/l	DS000	Accepted
Lead	Jul 1, 1993 – Dec 31, 1993	21	0.004 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.