Lead and copper

MS0100008 , Simpson Water Association #1

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 Simpson Water Association #1, 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, 2023 – Dec 31, 2025	10	0.184 mg/l	DS000	Accepted
Lead	Jan 1, 2023 – Dec 31, 2025	10	0.0011 mg/l	DS000	Accepted
Copper	Jan 1, 2020 – Dec 31, 2022	10	0.164 mg/l	DS000	Accepted
Lead	Jan 1, 2020 – Dec 31, 2022	10	0.0008 mg/l	DS000	Accepted
Copper	Jan 1, 2017 – Dec 31, 2019	10	0.1506 mg/l	DS000	Accepted
Lead	Jan 1, 2017 – Dec 31, 2019	10	0.001 mg/l	DS000	Accepted
Copper	Jan 1, 2015 – Dec 31, 2017	10	0.188 mg/l	DS000	Accepted
Lead	Jan 1, 2015 – Dec 31, 2017	10	0.0016 mg/l	DS000	Accepted
Copper	Jan 1, 2012 – Dec 31, 2014	10	0.1528 mg/l	DS000	Accepted
Lead	Jan 1, 2012 – Dec 31, 2014	10	0.0009 mg/l	DS000	Accepted
Copper	Jan 1, 2009 – Dec 31, 2011	10	0.3295 mg/l	DS000	Accepted
Lead	Jan 1, 2009 – Dec 31, 2011	10	0.0021 mg/l	DS000	Accepted
Copper	Jan 1, 2006 – Dec 31, 2008	12	0.1436 mg/l	DS000	Accepted
Lead	Jan 1, 2006 – Dec 31, 2008	12	0.0016 mg/l	DS000	Accepted
Copper	Jan 1, 2000 – Dec 31, 2002	5	0.124 mg/l	DS000	Accepted
Lead	Jan 1, 2000 – Dec 31, 2002	5	0.003 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1996	5	0.472 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Dec 31, 1996	5	0.011 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	5	0.396 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	5	0.002 mg/l	DS000	Accepted
Copper	Jan 1, 1994 – Jun 30, 1994	11	0.202 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Jun 30, 1994	11	0.002 mg/l	DS000	Accepted
Copper	Jul 1, 1993 – Dec 31, 1993	11	0.522 mg/l	DS000	Accepted
Lead	Jul 1, 1993 – Dec 31, 1993	11	0.004 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.