Lead and copper

MS0090004 , Houlka-Houston 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 Houlka-Houston 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	0.21 mg/l	DS000	Accepted
Lead	Jan 1, 2021 – Dec 31, 2023	10	0.0006 mg/l	DS000	Accepted
Copper	Jan 1, 2018 – Dec 31, 2020	10	0.3819 mg/l	DS000	Accepted
Lead	Jan 1, 2018 – Dec 31, 2020	10	0.0011 mg/l	DS000	Accepted
Copper	Jan 1, 2015 – Dec 31, 2017	11	0.3318 mg/l	DS000	Accepted
Lead	Jan 1, 2015 – Dec 31, 2017	11	0.002 mg/l	DS000	Accepted
Copper	Jan 1, 2012 – Dec 31, 2014	12	0.2335 mg/l	DS000	Accepted
Lead	Jan 1, 2012 – Dec 31, 2014	12	0.001 mg/l	DS000	Accepted
Copper	Jan 1, 2009 – Dec 31, 2011	12	0.2191 mg/l	DS000	Accepted
Lead	Jan 1, 2009 – Dec 31, 2011	12	0.0013 mg/l	DS000	Accepted
Copper	Jan 1, 2006 – Dec 31, 2008	10	0.0552 mg/l	DS000	Accepted
Lead	Jan 1, 2006 – Dec 31, 2008	10	0.0027 mg/l	DS000	Accepted
Copper	Jan 1, 2000 – Dec 31, 2002	10	0.053 mg/l	DS000	Accepted
Lead	Jan 1, 2000 – Dec 31, 2002	10	0.005 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1996	10	0.253 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Dec 31, 1996	10	0.007 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	10	0.193 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	10	0.005 mg/l	DS000	Accepted
Copper	Jan 1, 1994 – Jun 30, 1994	20	0.341 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Jun 30, 1994	20	0.004 mg/l	DS000	Accepted
Copper	Jul 1, 1993 – Dec 31, 1993	22	0.577 mg/l	DS000	Accepted
Lead	Jul 1, 1993 – Dec 31, 1993	22	0.003 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.