Lead and copper

MS0100009 , Town of Weir

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 Town of Weir, 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, 2023 – Dec 31, 2025	10	0.526 mg/l	DS000	Accepted
Lead	Jan 1, 2023 – Dec 31, 2025	10	0.0014 mg/l	DS000	Accepted
Copper	Jan 1, 2020 – Dec 31, 2022	10	0.156 mg/l	DS000	Accepted
Lead	Jan 1, 2020 – Dec 31, 2022	10	0.0033 mg/l	DS000	Accepted
Copper	Jan 1, 2017 – Dec 31, 2019	10	0.1826 mg/l	DS000	Accepted
Lead	Jan 1, 2017 – Dec 31, 2019	10	0.0014 mg/l	DS000	Accepted
Copper	Jan 1, 2015 – Dec 31, 2017	10	0.1222 mg/l	DS000	Accepted
Lead	Jan 1, 2015 – Dec 31, 2017	10	0.0013 mg/l	DS000	Accepted
Copper	Jan 1, 2012 – Dec 31, 2014	11	0.0437 mg/l	DS000	Accepted
Lead	Jan 1, 2012 – Dec 31, 2014	11	0.0009 mg/l	DS000	Accepted
Copper	Jan 1, 2009 – Dec 31, 2011	10	0.2641 mg/l	DS000	Accepted
Lead	Jan 1, 2009 – Dec 31, 2011	10	0.0048 mg/l	DS000	Accepted
Copper	Jan 1, 2006 – Dec 31, 2008	10	0.1054 mg/l	DS000	Accepted
Lead	Jan 1, 2006 – Dec 31, 2008	10	0.0013 mg/l	DS000	Accepted
Copper	Jan 1, 2000 – Dec 31, 2002	10	0.653 mg/l	DS000	Accepted
Lead	Jan 1, 2000 – Dec 31, 2002	10	0.006 mg/l	DS000	Accepted
Copper	Jan 1, 1997 – Dec 31, 1999	10	0.157 mg/l	DS000	Accepted
Lead	Jan 1, 1997 – Dec 31, 1999	10	0.005 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1996	10	0.419 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Dec 31, 1996	10	0.008 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	10	0.294 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	1.042 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Jun 30, 1994	20	0.006 mg/l	DS000	Accepted
Copper	Jul 1, 1993 – Dec 31, 1993	20	0.345 mg/l	DS000	Accepted
Lead	Jul 1, 1993 – Dec 31, 1993	20	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.