Lead and copper

MS0260027 , West Holmes 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 West Holmes Water Association, 30 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	10	0.108 mg/l	DS000	Accepted
Lead	Jan 1, 2021 – Dec 31, 2023	10	0.0021 mg/l	DS000	Accepted
Copper	Jan 1, 2018 – Dec 31, 2020	10	0.0227 mg/l	DS000	Accepted
Lead	Jan 1, 2018 – Dec 31, 2020	10	0.0011 mg/l	DS000	Accepted
Copper	Jan 1, 2015 – Dec 31, 2017	10	0.0561 mg/l	DS000	Accepted
Lead	Jan 1, 2015 – Dec 31, 2017	10	0.0031 mg/l	DS000	Accepted
Copper	Jan 1, 2012 – Dec 31, 2014	12	0.0255 mg/l	DS000	Accepted
Lead	Jan 1, 2012 – Dec 31, 2014	12	0.0012 mg/l	DS000	Accepted
Copper	Jan 1, 2009 – Dec 31, 2011	12	0.038 mg/l	DS000	Accepted
Lead	Jan 1, 2009 – Dec 31, 2011	12	0.0028 mg/l	DS000	Accepted
Copper	Jan 1, 2008 – Dec 31, 2008	12	0.3009 mg/l	DS000	Accepted
Lead	Jan 1, 2008 – Dec 31, 2008	12	0.0015 mg/l	DS000	Accepted
Copper	Jan 1, 2007 – Dec 31, 2007	12	0.2476 mg/l	DS000	Accepted
Lead	Jan 1, 2007 – Dec 31, 2007	12	0.0016 mg/l	DS000	Accepted
Copper	Jan 1, 2006 – Dec 31, 2006	12	0.0412 mg/l	DS000	Accepted
Lead	Jan 1, 2006 – Dec 31, 2006	12	0.0015 mg/l	DS000	Accepted
Copper	Jan 1, 2005 – Jun 30, 2005	24	0.178 mg/l	DS000	Accepted
Lead	Jan 1, 2005 – Jun 30, 2005	24	0.0003 mg/l	DS000	Accepted
Copper	Jul 1, 2004 – Dec 31, 2004	22	0.1996 mg/l	DS000	Accepted
Lead	Jul 1, 2004 – Dec 31, 2004	22	0.0006 mg/l	DS000	Accepted
Copper	Jan 1, 2001 – Jun 30, 2001	10	0.056 mg/l	DS000	Accepted
Lead	Jan 1, 2001 – Jun 30, 2001	10	0.002 mg/l	DS000	Accepted
Copper	Jul 1, 1999 – Dec 31, 1999	10	0.088 mg/l	DS000	Accepted
Lead	Jul 1, 1999 – Dec 31, 1999	10	0.004 mg/l	DS000	Accepted
Copper	Jul 1, 1998 – Dec 31, 1998	10	0 mg/l	DS000	Accepted
Lead	Jul 1, 1998 – Dec 31, 1998	10	0.001 mg/l	DS000	Accepted
Copper	Jan 1, 1998 – Jun 30, 1998	10	0 mg/l	DS000	Accepted
Lead	Jan 1, 1998 – Jun 30, 1998	10	0.002 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Jun 30, 1996	20	0 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Jun 30, 1996	20	0 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.