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
MS0360015 , University of Mississippi
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, 2022 – Dec 31, 2024 | 20 | 0.0054 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2022 – Dec 31, 2024 | 20 | 0 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2019 – Dec 31, 2021 | 20 | 0.0453 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2019 – Dec 31, 2021 | 20 | 0.0009 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2016 – Dec 31, 2018 | 20 | 0.4031 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2016 – Dec 31, 2018 | 20 | 0.0015 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2014 – Dec 31, 2016 | 20 | 0.5701 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2014 – Dec 31, 2016 | 20 | 0.0011 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2011 – Dec 31, 2013 | 20 | 0.6062 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2011 – Dec 31, 2013 | 20 | 0.0079 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2008 – Dec 31, 2010 | 20 | 0.8693 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2008 – Dec 31, 2010 | 20 | 0.0047 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2005 – Dec 31, 2007 | 20 | 0.3129 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2005 – Dec 31, 2007 | 20 | 0.0051 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2002 – Dec 31, 2004 | 20 | 0.1994 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2002 – Dec 31, 2004 | 20 | 0.0017 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1999 – Dec 31, 2001 | 20 | 0.301 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1999 – Dec 31, 2001 | 20 | 0.003 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1996 – Dec 31, 1998 | 20 | 0.541 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1996 – Dec 31, 1998 | 20 | 0.004 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1995 – Dec 31, 1995 | 20 | 0.186 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1995 – Dec 31, 1995 | 20 | 0.004 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1994 – Dec 31, 1994 | 20 | 1.174 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1994 – Dec 31, 1994 | 20 | 0.006 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1993 – Jun 30, 1993 | 60 | 0.066 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1993 – Jun 30, 1993 | 60 | 0.005 mg/l | DS000 | Accepted |
| Copper | Jul 1, 1992 – Dec 31, 1992 | 60 | 0.34 mg/l | DS000 | Accepted |
| Lead | Jul 1, 1992 – Dec 31, 1992 | 60 | 0.006 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.