Lead and copper

MS0230001 , City of Bay St Louis

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 Bay St Louis, 28 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	0.617 mg/l	DS000	Accepted
Lead	Jan 1, 2022 – Dec 31, 2024	20	0.009 mg/l	DS000	Accepted
Copper	Jan 1, 2019 – Dec 31, 2021	20	0.23 mg/l	DS000	Accepted
Lead	Jan 1, 2019 – Dec 31, 2021	20	0.0015 mg/l	DS000	Accepted
Copper	Jan 1, 2016 – Dec 31, 2018	20	0.2655 mg/l	DS000	Accepted
Lead	Jan 1, 2016 – Dec 31, 2018	20	0.0043 mg/l	DS000	Accepted
Copper	Jan 1, 2014 – Dec 31, 2016	20	0.3744 mg/l	DS000	Accepted
Lead	Jan 1, 2014 – Dec 31, 2016	20	0.0016 mg/l	DS000	Accepted
Copper	Jan 1, 2011 – Dec 31, 2013	20	0.2766 mg/l	DS000	Accepted
Lead	Jan 1, 2011 – Dec 31, 2013	20	0.0018 mg/l	DS000	Accepted
Copper	Jan 1, 2008 – Dec 31, 2010	22	0.301 mg/l	DS000	Accepted
Lead	Jan 1, 2008 – Dec 31, 2010	22	0.0015 mg/l	DS000	Accepted
Copper	Jan 1, 2005 – Dec 31, 2007	20	0.2707 mg/l	DS000	Accepted
Lead	Jan 1, 2005 – Dec 31, 2007	20	0.0031 mg/l	DS000	Accepted
Copper	Jan 1, 2002 – Dec 31, 2004	18	0.1299 mg/l	DS000	Accepted
Lead	Jan 1, 2002 – Dec 31, 2004	18	0.003 mg/l	DS000	Accepted
Copper	Jan 1, 1999 – Dec 31, 2001	20	0.186 mg/l	DS000	Accepted
Lead	Jan 1, 1999 – Dec 31, 2001	20	0.01 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1998	20	0.108 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Dec 31, 1998	20	0.01 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	20	0.151 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	20	0.006 mg/l	DS000	Accepted
Copper	Jan 1, 1994 – Dec 31, 1994	19	0.108 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Dec 31, 1994	19	0.005 mg/l	DS000	Accepted
Copper	Jan 1, 1993 – Jun 30, 1993	40	0.167 mg/l	DS000	Accepted
Lead	Jan 1, 1993 – Jun 30, 1993	40	0.006 mg/l	DS000	Accepted
Copper	Jul 1, 1992 – Dec 31, 1992	40	0.2 mg/l	DS000	Accepted
Lead	Jul 1, 1992 – Dec 31, 1992	40	0.007 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.