This is a rebuild of Drinking Water Watch and not yet the official record. Use the agency’s current Drinking Water Watch for anything you need to rely on.
Lead and copper
MS0070012 , New Liberty Water Association
Every monitoring period on record is listed here. This page applies no date range. The same list limited to the last two years.
| Analyte | Monitoring period | Samples | 90th percentile | Facility | Data quality |
|---|---|---|---|---|---|
| Copper | Jan 1, 2021 – Dec 31, 2023 | 5 | 0.102 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2021 – Dec 31, 2023 | 5 | 0.0012 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2018 – Dec 31, 2020 | 5 | 0.3241 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2018 – Dec 31, 2020 | 5 | 0.003 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2015 – Dec 31, 2017 | 5 | 0.513 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2015 – Dec 31, 2017 | 5 | 0.001 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2012 – Dec 31, 2014 | 5 | 0.1392 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2012 – Dec 31, 2014 | 5 | 0.0009 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2009 – Dec 31, 2011 | 5 | 0.1776 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2009 – Dec 31, 2011 | 5 | 0.0059 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2008 – Dec 31, 2008 | 5 | 0.1922 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2008 – Dec 31, 2008 | 5 | 0.0088 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2007 – Dec 31, 2007 | 5 | 0.2352 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2007 – Dec 31, 2007 | 5 | 0.0034 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2006 – Dec 31, 2006 | 5 | 0.28 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2006 – Dec 31, 2006 | 5 | 0.0032 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2004 – Dec 31, 2004 | 5 | 0.1324 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2004 – Dec 31, 2004 | 5 | 0.0003 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2002 – Dec 31, 2002 | 10 | 0.217 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2002 – Dec 31, 2002 | 10 | 0.002 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2000 – Dec 31, 2000 | 5 | 0.101 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2000 – Dec 31, 2000 | 5 | 0.001 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1996 – Dec 31, 1996 | 10 | 0.168 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1996 – Dec 31, 1996 | 10 | 0.001 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1995 – Jun 30, 1995 | 10 | 0.262 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1995 – Jun 30, 1995 | 10 | 0.001 mg/l | DS000 | Accepted |
| Copper | Jul 1, 1994 – Dec 31, 1994 | 10 | 0.092 mg/l | DS000 | Accepted |
| Lead | Jul 1, 1994 – Dec 31, 1994 | 10 | 0.003 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1994 – Jun 30, 1994 | 6 | 0.097 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1994 – Jun 30, 1994 | 6 | 0.004 mg/l | DS000 | Accepted |
| Copper | Jul 1, 1993 – Dec 31, 1993 | 10 | 0.131 mg/l | DS000 | Accepted |
| Lead | Jul 1, 1993 – Dec 31, 1993 | 10 | 0.002 mg/l | DS000 | Accepted |
No date of receipt is recorded for any of these summaries.
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.