Lead and copper

MS0200001 , Combined Utilities

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 Combined Utilities, 24 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	0.465 mg/l	DS000	Accepted
Lead	Jan 1, 2022 – Dec 31, 2024	20	0.0026 mg/l	DS000	Accepted
Copper	Jan 1, 2019 – Dec 31, 2021	20	0.448 mg/l	DS000	Accepted
Lead	Jan 1, 2019 – Dec 31, 2021	20	0.0017 mg/l	DS000	Accepted
Copper	Jan 1, 2016 – Dec 31, 2018	20	0.248 mg/l	DS000	Accepted
Lead	Jan 1, 2016 – Dec 31, 2018	20	0.004 mg/l	DS000	Accepted
Copper	Jan 1, 2014 – Dec 31, 2016	20	0.295 mg/l	DS000	Accepted
Lead	Jan 1, 2014 – Dec 31, 2016	20	0.0018 mg/l	DS000	Accepted
Copper	Jan 1, 2011 – Dec 31, 2013	20	0.377 mg/l	DS000	Accepted
Lead	Jan 1, 2011 – Dec 31, 2013	20	0.0029 mg/l	DS000	Accepted
Copper	Jan 1, 2008 – Dec 31, 2010	21	0.4558 mg/l	DS000	Accepted
Lead	Jan 1, 2008 – Dec 31, 2010	21	0.0034 mg/l	DS000	Accepted
Copper	Jan 1, 2005 – Dec 31, 2007	24	0.4545 mg/l	DS000	Accepted
Lead	Jan 1, 2005 – Dec 31, 2007	24	0.0027 mg/l	DS000	Accepted
Copper	Jan 1, 2000 – Dec 31, 2002	10	0.207 mg/l	DS000	Accepted
Lead	Jan 1, 2000 – Dec 31, 2002	10	0.013 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1996	10	0.407 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	11	0.464 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	11	0.01 mg/l	DS000	Accepted
Copper	Jan 1, 1994 – Jun 30, 1994	20	0.325 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Jun 30, 1994	20	0.005 mg/l	DS000	Accepted
Copper	Jul 1, 1993 – Dec 31, 1993	20	0.54 mg/l	DS000	Accepted
Lead	Jul 1, 1993 – Dec 31, 1993	20	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.