Lead and copper

MS0450021 , Bear Creek W/A-West

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 Bear Creek W/A-West, 28 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	30	0.127 mg/l	DS000	Accepted
Lead	Jan 1, 2022 – Dec 31, 2024	30	0.0016 mg/l	DS000	Accepted
Copper	Jan 1, 2019 – Dec 31, 2021	30	0.148 mg/l	DS000	Accepted
Lead	Jan 1, 2019 – Dec 31, 2021	30	0.0039 mg/l	DS000	Accepted
Copper	Jan 1, 2016 – Dec 31, 2018	30	0.1144 mg/l	DS000	Accepted
Lead	Jan 1, 2016 – Dec 31, 2018	30	0.0037 mg/l	DS000	Accepted
Copper	Jan 1, 2014 – Dec 31, 2016	31	0.1536 mg/l	DS000	Accepted
Lead	Jan 1, 2014 – Dec 31, 2016	31	0.0039 mg/l	DS000	Accepted
Copper	Jan 1, 2011 – Dec 31, 2013	30	0.1223 mg/l	DS000	Accepted
Lead	Jan 1, 2011 – Dec 31, 2013	30	0.0025 mg/l	DS000	Accepted
Copper	Jan 1, 2008 – Dec 31, 2010	30	0.1967 mg/l	DS000	Accepted
Lead	Jan 1, 2008 – Dec 31, 2010	30	0.0016 mg/l	DS000	Accepted
Copper	Jan 1, 2005 – Dec 31, 2007	29	0.1122 mg/l	DS000	Accepted
Lead	Jan 1, 2005 – Dec 31, 2007	29	0.0056 mg/l	DS000	Accepted
Copper	Jan 1, 2002 – Dec 31, 2004	30	0.5637 mg/l	DS000	Accepted
Lead	Jan 1, 2002 – Dec 31, 2004	30	0.007 mg/l	DS000	Accepted
Copper	Jan 1, 1999 – Dec 31, 2001	20	0.836 mg/l	DS000	Accepted
Lead	Jan 1, 1999 – Dec 31, 2001	20	0.014 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1998	19	0.325 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Dec 31, 1998	19	0.004 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	19	0.164 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	19	0.005 mg/l	DS000	Accepted
Copper	Jan 1, 1994 – Dec 31, 1994	20	0.193 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Dec 31, 1994	20	0.006 mg/l	DS000	Accepted
Copper	Jan 1, 1993 – Jun 30, 1993	40	0.13 mg/l	DS000	Accepted
Lead	Jan 1, 1993 – Jun 30, 1993	40	0.003 mg/l	DS000	Accepted
Copper	Jul 1, 1992 – Dec 31, 1992	40	0.23 mg/l	DS000	Accepted
Lead	Jul 1, 1992 – Dec 31, 1992	40	0.005 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.