Lead and copper

MS0010002 , City of Natchez

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 Natchez, 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	30	0.0956 mg/l	DS000	Accepted
Lead	Jan 1, 2022 – Dec 31, 2024	30	0.00501 mg/l	DS000	Accepted
Copper	Jan 1, 2020 – Dec 31, 2022	30	0.133 mg/l	DS000	Accepted
Lead	Jan 1, 2020 – Dec 31, 2022	30	0.0049 mg/l	DS000	Accepted
Copper	Jan 1, 2019 – Dec 31, 2021	30	0.133 mg/l	DS000	Accepted
Lead	Jan 1, 2019 – Dec 31, 2021	30	0.0049 mg/l	DS000	Accepted
Copper	Jan 1, 2017 – Dec 31, 2019	41	0.1259 mg/l	DS000	Accepted
Lead	Jan 1, 2017 – Dec 31, 2019	41	0.0038 mg/l	DS000	Accepted
Copper	Jan 1, 2016 – Dec 31, 2018	41	0.1259 mg/l	DS000	Accepted
Lead	Jan 1, 2016 – Dec 31, 2018	41	0.0038 mg/l	DS000	Accepted
Copper	Jan 1, 2014 – Dec 31, 2016	36	0.139 mg/l	DS000	Accepted
Lead	Jan 1, 2014 – Dec 31, 2016	36	0.0023 mg/l	DS000	Accepted
Copper	Jan 1, 2013 – Dec 31, 2015	36	0.139 mg/l	DS000	Accepted
Lead	Jan 1, 2013 – Dec 31, 2015	36	0.0023 mg/l	DS000	Accepted
Copper	Jan 1, 2011 – Dec 31, 2013	34	0.1628 mg/l	DS000	Accepted
Lead	Jan 1, 2011 – Dec 31, 2013	34	0.0049 mg/l	DS000	Accepted
Copper	Jan 1, 2010 – Dec 31, 2012	34	0.1628 mg/l	DS000	Accepted
Lead	Jan 1, 2010 – Dec 31, 2012	34	0.0049 mg/l	DS000	Accepted
Copper	Jan 1, 2008 – Dec 31, 2010	30	0.1607 mg/l	DS000	Accepted
Lead	Jan 1, 2008 – Dec 31, 2010	30	0.0033 mg/l	DS000	Accepted
Copper	Jan 1, 2005 – Dec 31, 2007	30	0.1562 mg/l	DS000	Accepted
Lead	Jan 1, 2005 – Dec 31, 2007	30	0.0032 mg/l	DS000	Accepted
Copper	Jan 1, 2002 – Dec 31, 2004	30	0.1154 mg/l	DS000	Accepted
Lead	Jan 1, 2002 – Dec 31, 2004	30	0.0025 mg/l	DS000	Accepted
Copper	Jan 1, 1999 – Dec 31, 2001	30	0.041 mg/l	DS000	Accepted
Lead	Jan 1, 1999 – Dec 31, 2001	30	0.004 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1998	30	0.086 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Dec 31, 1998	30	0.004 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	30	0 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	30	0.002 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	0.003 mg/l	DS000	Accepted
Copper	Jan 1, 1993 – Jun 30, 1993	60	0 mg/l	DS000	Accepted
Lead	Jan 1, 1993 – Jun 30, 1993	60	0.002 mg/l	DS000	Accepted
Copper	Jul 1, 1992 – Dec 31, 1992	63	0 mg/l	DS000	Accepted
Lead	Jul 1, 1992 – Dec 31, 1992	63	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.