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
MS0190015 , FCWA-Hamburg
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 | 10 | 0.0542 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2022 – Dec 31, 2024 | 10 | 0.001 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2019 – Dec 31, 2021 | 10 | 0.0421 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2019 – Dec 31, 2021 | 10 | 0.0008 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2016 – Dec 31, 2018 | 11 | 0.1639 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2016 – Dec 31, 2018 | 11 | 0.0017 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2013 – Dec 31, 2015 | 10 | 0.0688 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2013 – Dec 31, 2015 | 10 | 0.0021 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2012 – Dec 31, 2012 | 12 | 0.6673 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2012 – Dec 31, 2012 | 12 | 0.0039 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2011 – Dec 31, 2011 | 6 | 0.1211 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2011 – Dec 31, 2011 | 6 | 0.0007 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2010 – Dec 31, 2010 | 20 | 0.6261 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2010 – Dec 31, 2010 | 20 | 0.0008 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2010 – Jun 30, 2010 | 20 | 0.6942 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2010 – Jun 30, 2010 | 20 | 0.0022 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2009 – Dec 31, 2009 | 20 | 1.5917 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2009 – Dec 31, 2009 | 20 | 0.0057 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2009 – Jun 30, 2009 | 20 | 1.5266 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2009 – Jun 30, 2009 | 20 | 0.007 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2008 – Dec 31, 2008 | 20 | 1.4475 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2008 – Dec 31, 2008 | 20 | 0.0076 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2008 – Jun 30, 2008 | 20 | 1.1043 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2008 – Jun 30, 2008 | 20 | 0.0051 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.