Lead and copper

MS0820008 , Hilton Heights 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 Hilton Heights Water Assn #1, 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	0.227 mg/l	DS000	Accepted
Lead	Jan 1, 2021 – Dec 31, 2023	10	0.004 mg/l	DS000	Accepted
Copper	Jan 1, 2018 – Dec 31, 2020	10	0.3414 mg/l	DS000	Accepted
Lead	Jan 1, 2018 – Dec 31, 2020	10	0.0019 mg/l	DS000	Accepted
Copper	Jan 1, 2012 – Dec 31, 2014	10	0.2817 mg/l	DS000	Accepted
Lead	Jan 1, 2012 – Dec 31, 2014	10	0.0017 mg/l	DS000	Accepted
Copper	Jan 1, 2009 – Dec 31, 2011	10	0.384 mg/l	DS000	Accepted
Lead	Jan 1, 2009 – Dec 31, 2011	10	0.0026 mg/l	DS000	Accepted
Copper	Jan 1, 2006 – Dec 31, 2008	10	0.1594 mg/l	DS000	Accepted
Lead	Jan 1, 2006 – Dec 31, 2008	10	0.0044 mg/l	DS000	Accepted
Copper	Jan 1, 2003 – Dec 31, 2005	10	0.233 mg/l	DS000	Accepted
Lead	Jan 1, 2003 – Dec 31, 2005	10	0.003 mg/l	DS000	Accepted
Copper	Jan 1, 2000 – Dec 31, 2002	55	0.235 mg/l	DS000	Accepted
Lead	Jan 1, 2000 – Dec 31, 2002	55	0.007 mg/l	DS000	Accepted
Copper	Jan 1, 1996 – Dec 31, 1996	5	0.076 mg/l	DS000	Accepted
Lead	Jan 1, 1996 – Dec 31, 1996	5	0.001 mg/l	DS000	Accepted
Copper	Jan 1, 1995 – Dec 31, 1995	5	0.146 mg/l	DS000	Accepted
Lead	Jan 1, 1995 – Dec 31, 1995	5	0.008 mg/l	DS000	Accepted
Copper	Jan 1, 1994 – Jun 30, 1994	10	0.197 mg/l	DS000	Accepted
Lead	Jan 1, 1994 – Jun 30, 1994	10	0.005 mg/l	DS000	Accepted
Copper	Jul 1, 1993 – Dec 31, 1993	11	0.102 mg/l	DS000	Accepted
Lead	Jul 1, 1993 – Dec 31, 1993	11	0.007 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.