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
MS0030021 , Wilk-Amite W/A #2-Northwest
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, 2023 – Dec 31, 2025 | 5 | 0.0037 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2023 – Dec 31, 2025 | 5 | 0 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2022 – Dec 31, 2022 | 5 | 0.0435 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2022 – Dec 31, 2022 | 5 | 0.0086 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2021 – Dec 31, 2021 | 5 | 0.0177 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2021 – Dec 31, 2021 | 5 | 0.0006 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2020 – Dec 31, 2020 | 5 | 0.0079 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2020 – Dec 31, 2020 | 5 | 0.0006 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2019 – Dec 31, 2019 | 5 | 0.0547 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2019 – Dec 31, 2019 | 5 | 0.0012 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2019 – Jun 30, 2019 | 5 | 0.9576 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2019 – Jun 30, 2019 | 5 | 0.0024 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2018 – Jun 30, 2018 | 6 | 0.0167 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2018 – Jun 30, 2018 | 6 | 0 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2017 – Dec 31, 2017 | 5 | 2.0779 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2017 – Dec 31, 2017 | 5 | 0.0028 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2017 – Jun 30, 2017 | 4 | 0.0549 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2017 – Jun 30, 2017 | 4 | 0.0082 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2016 – Dec 31, 2016 | 5 | 0.4444 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2016 – Dec 31, 2016 | 5 | 0.0333 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2016 – Jun 30, 2016 | 5 | 0.6515 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2016 – Jun 30, 2016 | 5 | 0.005 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2015 – Dec 31, 2015 | 5 | 0.5705 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2015 – Dec 31, 2015 | 5 | 0.0025 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2015 – Jun 30, 2015 | 5 | 0.7326 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2015 – Jun 30, 2015 | 5 | 0.0051 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2012 – Dec 31, 2014 | 5 | 0.02 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2012 – Dec 31, 2014 | 5 | 0.0157 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2011 – Dec 31, 2011 | 5 | 0.3231 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2011 – Dec 31, 2011 | 5 | 0.0055 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2010 – Dec 31, 2010 | 5 | 0.7202 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2010 – Dec 31, 2010 | 5 | 0.0044 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2009 – Dec 31, 2009 | 10 | 0.0652 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2009 – Dec 31, 2009 | 10 | 0.0012 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2009 – Jun 30, 2009 | 10 | 0.3935 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2009 – Jun 30, 2009 | 10 | 0.012 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2006 – Dec 31, 2008 | 5 | 0.4959 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2006 – Dec 31, 2008 | 5 | 0.0247 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2003 – Dec 31, 2005 | 5 | 0.0272 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2003 – Dec 31, 2005 | 5 | 0.0004 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2000 – Dec 31, 2002 | 5 | 0.002 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2000 – Dec 31, 2002 | 5 | 0 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1996 – Dec 31, 1996 | 5 | 0.026 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 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1995 – Dec 31, 1995 | 5 | 0 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1994 – Jun 30, 1994 | 10 | 0 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1994 – Jun 30, 1994 | 10 | 0.003 mg/l | DS000 | Accepted |
| Copper | Jul 1, 1993 – Dec 31, 1993 | 10 | 0 mg/l | DS000 | Accepted |
| Lead | Jul 1, 1993 – Dec 31, 1993 | 10 | 0.001 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.