Lead and copper

MS0480007 , Hamilton Water District

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 Hamilton Water District, 34 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	0.175 mg/l	DS000	Accepted
Lead	Jan 1, 2022 – Dec 31, 2024	20	0 mg/l	DS000	Accepted
Copper	Jan 1, 2019 – Dec 31, 2021	20	0.111 mg/l	DS000	Accepted
Lead	Jan 1, 2019 – Dec 31, 2021	20	0 mg/l	DS000	Accepted
Copper	Jan 1, 2018 – Dec 31, 2018	20	0.0948 mg/l	DS000	Accepted
Lead	Jan 1, 2018 – Dec 31, 2018	20	0 mg/l	DS000	Accepted
Copper	Jan 1, 2017 – Dec 31, 2017	20	0.0622 mg/l	DS000	Accepted
Lead	Jan 1, 2017 – Dec 31, 2017	20	0.0006 mg/l	DS000	Accepted
Copper	Jan 1, 2016 – Dec 31, 2016	20	0.0711 mg/l	DS000	Accepted
Lead	Jan 1, 2016 – Dec 31, 2016	20	0.0006 mg/l	DS000	Accepted
Copper	Jan 1, 2015 – Jun 30, 2015	40	0.3697 mg/l	DS000	Accepted
Lead	Jan 1, 2015 – Jun 30, 2015	40	0 mg/l	DS000	Accepted
Copper	Jul 1, 2014 – Dec 31, 2014	40	0.367 mg/l	DS000	Accepted
Lead	Jul 1, 2014 – Dec 31, 2014	40	0 mg/l	DS000	Accepted
Copper	Jan 1, 2014 – Jun 30, 2014	40	0.3228 mg/l	DS000	Accepted
Lead	Jan 1, 2014 – Jun 30, 2014	40	0.0008 mg/l	DS000	Accepted
Copper	Jan 1, 2011 – Dec 31, 2013	20	1.5961 mg/l	DS000	Accepted
Lead	Jan 1, 2011 – Dec 31, 2013	20	0.0039 mg/l	DS000	Accepted
Copper	Jan 1, 2008 – Dec 31, 2010	20	0.8844 mg/l	DS000	Accepted
Lead	Jan 1, 2008 – Dec 31, 2010	20	0.0014 mg/l	DS000	Accepted
Copper	Jan 1, 2005 – Dec 31, 2007	21	0.7584 mg/l	DS000	Accepted
Lead	Jan 1, 2005 – Dec 31, 2007	21	0.0025 mg/l	DS000	Accepted
Copper	Jan 1, 2000 – Dec 31, 2002	10	0.323 mg/l	DS000	Accepted
Lead	Jan 1, 2000 – Dec 31, 2002	10	0.001 mg/l	DS000	Accepted
Copper	Jan 1, 1997 – Dec 31, 1999	10	0.268 mg/l	DS000	Accepted
Lead	Jan 1, 1997 – Dec 31, 1999	10	0.003 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1996	10	0.681 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Dec 31, 1996	10	0.004 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	10	0.32 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	10	0.006 mg/l	DS000	Accepted
Copper	Jan 1, 1994 – Jun 30, 1994	20	0.511 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Jun 30, 1994	20	0.001 mg/l	DS000	Accepted
Copper	Jul 1, 1993 – Dec 31, 1993	20	0.553 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.