Lead and copper

MS0400016 , Marydell Water Association

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 Marydell Water Association, 32 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, 2018 – Dec 31, 2020	10	0.2653 mg/l	DS000	Accepted
Lead	Jan 1, 2018 – Dec 31, 2020	10	0.001 mg/l	DS000	Accepted
Copper	Jan 1, 2017 – Dec 31, 2019	10	0.6033 mg/l	DS000	Accepted
Lead	Jan 1, 2017 – Dec 31, 2019	10	0.0008 mg/l	DS000	Accepted
Copper	Jan 1, 2016 – Dec 31, 2016	10	0.4209 mg/l	DS000	Accepted
Lead	Jan 1, 2016 – Dec 31, 2016	10	0.001 mg/l	DS000	Accepted
Copper	Jan 1, 2015 – Dec 31, 2015	10	0.6268 mg/l	DS000	Accepted
Lead	Jan 1, 2015 – Dec 31, 2015	10	0.001 mg/l	DS000	Accepted
Copper	Jan 1, 2014 – Dec 31, 2014	10	0.3988 mg/l	DS000	Accepted
Lead	Jan 1, 2014 – Dec 31, 2014	10	0.0041 mg/l	DS000	Accepted
Copper	Jan 1, 2013 – Dec 31, 2013	10	0.3775 mg/l	DS000	Accepted
Lead	Jan 1, 2013 – Dec 31, 2013	10	0.0011 mg/l	DS000	Accepted
Copper	Jul 1, 2012 – Dec 31, 2012	20	0.5192 mg/l	DS000	Accepted
Lead	Jul 1, 2012 – Dec 31, 2012	20	0.001 mg/l	DS000	Accepted
Copper	Jan 1, 2012 – Jun 30, 2012	20	0.3786 mg/l	DS000	Accepted
Lead	Jan 1, 2012 – Jun 30, 2012	20	0.0011 mg/l	DS000	Accepted
Copper	Jan 1, 2009 – Dec 31, 2011	10	0.5399 mg/l	DS000	Accepted
Lead	Jan 1, 2009 – Dec 31, 2011	10	0.0251 mg/l	DS000	Accepted
Copper	Jan 1, 2006 – Dec 31, 2008	10	0.189 mg/l	DS000	Accepted
Lead	Jan 1, 2006 – Dec 31, 2008	10	0.0016 mg/l	DS000	Accepted
Copper	Jan 1, 2000 – Dec 31, 2002	10	0.647 mg/l	DS000	Accepted
Lead	Jan 1, 2000 – Dec 31, 2002	10	0.003 mg/l	DS000	Accepted
Copper	Jan 1, 1997 – Dec 31, 1999	10	0.588 mg/l	DS000	Accepted
Lead	Jan 1, 1997 – Dec 31, 1999	10	0 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1996	10	0.578 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Dec 31, 1996	10	0.005 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	10	0.593 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	10	0 mg/l	DS000	Accepted
Copper	Jan 1, 1994 – Jun 30, 1994	20	0.876 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Jun 30, 1994	20	0.002 mg/l	DS000	Accepted
Copper	Jul 1, 1993 – Dec 31, 1993	21	0.845 mg/l	DS000	Accepted
Lead	Jul 1, 1993 – Dec 31, 1993	21	0.003 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.