Lead and copper

MS0350006 , Porterville W/A

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 Porterville W/A, 22 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	0.131 mg/l	DS000	Accepted
Lead	Jan 1, 2021 – Dec 31, 2023	10	0.000521 mg/l	DS000	Accepted
Copper	Jan 1, 2018 – Dec 31, 2020	10	0.133 mg/l	DS000	Accepted
Lead	Jan 1, 2018 – Dec 31, 2020	10	0.001 mg/l	DS000	Accepted
Copper	Jan 1, 2015 – Dec 31, 2017	10	0.1592 mg/l	DS000	Accepted
Lead	Jan 1, 2015 – Dec 31, 2017	10	0.0008 mg/l	DS000	Accepted
Copper	Jan 1, 2012 – Dec 31, 2014	10	0.1311 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	0.1787 mg/l	DS000	Accepted
Lead	Jan 1, 2009 – Dec 31, 2011	10	0.0008 mg/l	DS000	Accepted
Copper	Jan 1, 2006 – Dec 31, 2008	10	0.2818 mg/l	DS000	Accepted
Lead	Jan 1, 2006 – Dec 31, 2008	10	0.002 mg/l	DS000	Accepted
Copper	Jan 1, 2000 – Dec 31, 2002	10	0.089 mg/l	DS000	Accepted
Lead	Jan 1, 2000 – Dec 31, 2002	10	0.001 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1996	10	0.132 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Dec 31, 1996	10	0.003 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	10	0.194 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	10	0.004 mg/l	DS000	Accepted
Copper	Jan 1, 1994 – Jun 30, 1994	20	0.321 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Jun 30, 1994	20	0.002 mg/l	DS000	Accepted
Copper	Jul 1, 1993 – Dec 31, 1993	20	0.138 mg/l	DS000	Accepted
Lead	Jul 1, 1993 – Dec 31, 1993	20	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.