Lead and copper

MS0130018 , Golden Triangle 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 Golden Triangle 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	0.137 mg/l	DS000	Accepted
Lead	Jan 1, 2023 – Dec 31, 2025	10	0.0015 mg/l	DS000	Accepted
Copper	Jan 1, 2020 – Dec 31, 2022	10	0.0731 mg/l	DS000	Accepted
Lead	Jan 1, 2020 – Dec 31, 2022	10	0.0016 mg/l	DS000	Accepted
Copper	Jan 1, 2017 – Dec 31, 2019	11	0.4002 mg/l	DS000	Accepted
Lead	Jan 1, 2017 – Dec 31, 2019	11	0.0015 mg/l	DS000	Accepted
Copper	Jan 1, 2015 – Dec 31, 2017	10	0.3554 mg/l	DS000	Accepted
Lead	Jan 1, 2015 – Dec 31, 2017	10	0.0005 mg/l	DS000	Accepted
Copper	Jan 1, 2012 – Dec 31, 2014	10	0.1748 mg/l	DS000	Accepted
Lead	Jan 1, 2012 – Dec 31, 2014	10	0.0013 mg/l	DS000	Accepted
Copper	Jan 1, 2009 – Dec 31, 2011	10	0.3699 mg/l	DS000	Accepted
Lead	Jan 1, 2009 – Dec 31, 2011	10	0.0018 mg/l	DS000	Accepted
Copper	Jan 1, 2006 – Dec 31, 2008	10	1.0515 mg/l	DS000	Accepted
Lead	Jan 1, 2006 – Dec 31, 2008	10	0.0046 mg/l	DS000	Accepted
Copper	Jan 1, 2000 – Dec 31, 2002	10	0.214 mg/l	DS000	Accepted
Lead	Jan 1, 2000 – Dec 31, 2002	10	0.005 mg/l	DS000	Accepted
Copper	Jan 1, 1997 – Dec 31, 1999	10	0.484 mg/l	DS000	Accepted
Lead	Jan 1, 1997 – Dec 31, 1999	10	0.004 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1996	10	0.403 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Dec 31, 1996	10	0.006 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	10	0.083 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	10	0.002 mg/l	DS000	Accepted
Copper	Jan 1, 1994 – Jun 30, 1994	20	0.354 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Jun 30, 1994	20	0.006 mg/l	DS000	Accepted
Copper	Jul 1, 1993 – Dec 31, 1993	20	0.586 mg/l	DS000	Accepted
Lead	Jul 1, 1993 – Dec 31, 1993	20	0.008 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.