Lead and copper

MS0040001 , Conehoma Water Assn #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 Conehoma Water Assn #1, 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, 2023 – Dec 31, 2025	10	0.298 mg/l	DS000	Accepted
Lead	Jan 1, 2023 – Dec 31, 2025	10	0 mg/l	DS000	Accepted
Copper	Jan 1, 2020 – Dec 31, 2022	10	0.486 mg/l	DS000	Accepted
Lead	Jan 1, 2020 – Dec 31, 2022	10	0.0007 mg/l	DS000	Accepted
Copper	Jan 1, 2017 – Dec 31, 2019	10	0.5978 mg/l	DS000	Accepted
Lead	Jan 1, 2017 – Dec 31, 2019	10	0.0014 mg/l	DS000	Accepted
Copper	Jan 1, 2015 – Dec 31, 2017	10	0.3321 mg/l	DS000	Accepted
Lead	Jan 1, 2015 – Dec 31, 2017	10	0.0017 mg/l	DS000	Accepted
Copper	Jan 1, 2012 – Dec 31, 2014	10	0.0743 mg/l	DS000	Accepted
Lead	Jan 1, 2012 – Dec 31, 2014	10	0.0007 mg/l	DS000	Accepted
Copper	Jan 1, 2009 – Dec 31, 2011	10	0.2989 mg/l	DS000	Accepted
Lead	Jan 1, 2009 – Dec 31, 2011	10	0.0006 mg/l	DS000	Accepted
Copper	Jan 1, 2006 – Dec 31, 2008	11	0.3473 mg/l	DS000	Accepted
Lead	Jan 1, 2006 – Dec 31, 2008	11	0.0019 mg/l	DS000	Accepted
Copper	Jan 1, 2000 – Dec 31, 2002	10	0.377 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	9	0.561 mg/l	DS000	Accepted
Lead	Jan 1, 1997 – Dec 31, 1999	9	0.002 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1996	10	0.315 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Dec 31, 1996	10	0.002 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	10	0.508 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	10	0.007 mg/l	DS000	Accepted
Copper	Jan 1, 1994 – Jun 30, 1994	20	0.301 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Jun 30, 1994	20	0.003 mg/l	DS000	Accepted
Copper	Jul 1, 1993 – Dec 31, 1993	21	0.699 mg/l	DS000	Accepted
Lead	Jul 1, 1993 – Dec 31, 1993	21	0.002 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.