Lead and copper

MS0340004 , Erata 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 Erata Water Association, 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, 2024 – Dec 31, 2026	10	0 mg/l	DS000	Accepted
Lead	Jan 1, 2024 – Dec 31, 2026	10	0 mg/l	DS000	Accepted
Copper	Jan 1, 2021 – Dec 31, 2023	10	0.272 mg/l	DS000	Accepted
Lead	Jan 1, 2021 – Dec 31, 2023	10	0.0016 mg/l	DS000	Accepted
Copper	Jan 1, 2018 – Dec 31, 2020	9	0.2862 mg/l	DS000	Accepted
Lead	Jan 1, 2018 – Dec 31, 2020	9	0.0018 mg/l	DS000	Accepted
Copper	Jan 1, 2015 – Dec 31, 2017	10	0.4669 mg/l	DS000	Accepted
Lead	Jan 1, 2015 – Dec 31, 2017	10	0.0119 mg/l	DS000	Accepted
Copper	Jan 1, 2012 – Dec 31, 2014	11	0.4548 mg/l	DS000	Accepted
Lead	Jan 1, 2012 – Dec 31, 2014	11	0.0051 mg/l	DS000	Accepted
Copper	Jan 1, 2009 – Dec 31, 2011	10	0.2453 mg/l	DS000	Accepted
Lead	Jan 1, 2009 – Dec 31, 2011	10	0.0047 mg/l	DS000	Accepted
Copper	Jan 1, 2006 – Dec 31, 2008	11	0.2925 mg/l	DS000	Accepted
Lead	Jan 1, 2006 – Dec 31, 2008	11	0.0127 mg/l	DS000	Accepted
Copper	Jan 1, 2000 – Dec 31, 2002	10	0.179 mg/l	DS000	Accepted
Lead	Jan 1, 2000 – Dec 31, 2002	10	0.01 mg/l	DS000	Accepted
Copper	Jan 1, 1997 – Dec 31, 1999	10	0.116 mg/l	DS000	Accepted
Lead	Jan 1, 1997 – Dec 31, 1999	10	0.001 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1996	10	0.161 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Dec 31, 1996	10	0.005 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	10	0.169 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	10	0.003 mg/l	DS000	Accepted
Copper	Jan 1, 1994 – Jun 30, 1994	20	0.251 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	20	0.072 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.