Lead and copper

MS0110004 , Pattison W/A-West

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 Pattison W/A-West, 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, 2021 – Dec 31, 2023	9	0.207 mg/l	DS000	Accepted
Lead	Jan 1, 2021 – Dec 31, 2023	9	0.0035 mg/l	DS000	Accepted
Copper	Jan 1, 2018 – Dec 31, 2020	10	0.1419 mg/l	DS000	Accepted
Lead	Jan 1, 2018 – Dec 31, 2020	10	0.0007 mg/l	DS000	Accepted
Copper	Jan 1, 2015 – Dec 31, 2017	19	0.1219 mg/l	DS000	Accepted
Lead	Jan 1, 2015 – Dec 31, 2017	19	0.0008 mg/l	DS000	Accepted
Copper	Jan 1, 2012 – Dec 31, 2014	10	0.1291 mg/l	DS000	Accepted
Lead	Jan 1, 2012 – Dec 31, 2014	10	0.0019 mg/l	DS000	Accepted
Copper	Jan 1, 2009 – Dec 31, 2011	10	0.0702 mg/l	DS000	Accepted
Lead	Jan 1, 2009 – Dec 31, 2011	10	0.0011 mg/l	DS000	Accepted
Copper	Jan 1, 2006 – Dec 31, 2008	21	0.1035 mg/l	DS000	Accepted
Lead	Jan 1, 2006 – Dec 31, 2008	21	0.0011 mg/l	DS000	Accepted
Copper	Jan 1, 2000 – Dec 31, 2002	10	0.648 mg/l	DS000	Accepted
Lead	Jan 1, 2000 – Dec 31, 2002	10	0.008 mg/l	DS000	Accepted
Copper	Jan 1, 1997 – Dec 31, 1999	10	0.273 mg/l	DS000	Accepted
Lead	Jan 1, 1997 – Dec 31, 1999	10	0.002 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1996	10	0.293 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Dec 31, 1996	10	0.002 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	10	0.17 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	10	0.002 mg/l	DS000	Accepted
Copper	Jul 1, 1994 – Dec 31, 1994	20	0.23 mg/l	DS000	Accepted
Lead	Jul 1, 1994 – Dec 31, 1994	20	0.004 mg/l	DS000	Accepted
Copper	Jan 1, 1994 – Jun 30, 1994	20	0.314 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Jun 30, 1994	20	0.004 mg/l	DS000	Accepted
Copper	Jul 1, 1993 – Dec 31, 1993	14	0.22 mg/l	DS000	Accepted
Lead	Jul 1, 1993 – Dec 31, 1993	14	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.