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
MS0600010 , South Quitman-S Lambert Utl
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 | 10 | 0.196 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2023 – Dec 31, 2025 | 10 | 0.0016 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2022 – Jun 30, 2022 | 20 | 0.399 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2022 – Jun 30, 2022 | 20 | 0.0035 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2021 – Dec 31, 2021 | 20 | 0.391 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2021 – Dec 31, 2021 | 20 | 0.0031 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2021 – Jun 30, 2021 | 15 | 0.33 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2021 – Jun 30, 2021 | 15 | 0.0013 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2020 – Dec 31, 2020 | 14 | 0.646 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2020 – Dec 31, 2020 | 14 | 0.0011 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2018 – Dec 31, 2020 | 5 | 0.039 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2018 – Dec 31, 2020 | 5 | 0.0025 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2017 – Dec 31, 2019 | 7 | 0.039 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2017 – Dec 31, 2019 | 7 | 0.0024 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2015 – Dec 31, 2017 | 2 | 0.0115 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2015 – Dec 31, 2017 | 2 | 0.0005 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2014 – Dec 31, 2016 | 5 | 0.0766 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2014 – Dec 31, 2016 | 5 | 0.0022 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2012 – Dec 31, 2014 | 5 | 0.0766 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2012 – Dec 31, 2014 | 5 | 0.0022 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2011 – Dec 31, 2013 | 5 | 0.0428 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2011 – Dec 31, 2013 | 5 | 0.0018 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2009 – Dec 31, 2011 | 5 | 0.0428 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2009 – Dec 31, 2011 | 5 | 0.0018 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2006 – Dec 31, 2008 | 5 | 0.0534 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2006 – Dec 31, 2008 | 5 | 0.0014 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2000 – Dec 31, 2002 | 5 | 0.298 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2000 – Dec 31, 2002 | 5 | 0.001 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1996 – Dec 31, 1996 | 5 | 0.256 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1996 – Dec 31, 1996 | 5 | 0.006 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1995 – Dec 31, 1995 | 5 | 0.257 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1995 – Dec 31, 1995 | 5 | 0.006 mg/l | DS000 | Accepted |
| Copper | Jul 1, 1994 – Dec 31, 1994 | 10 | 0.303 mg/l | DS000 | Accepted |
| Lead | Jul 1, 1994 – Dec 31, 1994 | 10 | 0.006 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1994 – Jun 30, 1994 | 10 | 0.271 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1994 – Jun 30, 1994 | 10 | 0.003 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.