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
MS0270022 , Humphreys Co W/A #6-Gooden Lak
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 | 0.0676 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2022 – Dec 31, 2024 | 10 | 0.0006 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2019 – Dec 31, 2021 | 10 | 0.0501 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2019 – Dec 31, 2021 | 10 | 0.0005 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2016 – Dec 31, 2018 | 10 | 0.0761 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2016 – Dec 31, 2018 | 10 | 0 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2014 – Dec 31, 2016 | 10 | 0.042 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2014 – Dec 31, 2016 | 10 | 0 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2011 – Dec 31, 2013 | 10 | 0.134 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2011 – Dec 31, 2013 | 10 | 0.0013 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2008 – Dec 31, 2010 | 20 | 0.0258 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2008 – Dec 31, 2010 | 20 | 0.0006 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2007 – Dec 31, 2007 | 10 | 0.0474 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2007 – Dec 31, 2007 | 10 | 0.0006 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2006 – Dec 31, 2006 | 10 | 0.0751 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2006 – Dec 31, 2006 | 10 | 0 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2005 – Jun 30, 2005 | 20 | 0.1205 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2005 – Jun 30, 2005 | 20 | 0.0013 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2004 – Dec 31, 2004 | 20 | 0.077 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2004 – Dec 31, 2004 | 20 | 0 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2000 – Dec 31, 2000 | 5 | 0.006 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2000 – Dec 31, 2000 | 5 | 0.001 mg/l | DS000 | Accepted |
| Copper | Jul 1, 1996 – Dec 31, 1996 | 5 | 0.088 mg/l | DS000 | Accepted |
| Lead | Jul 1, 1996 – Dec 31, 1996 | 5 | 0.004 mg/l | DS000 | Accepted |
| Copper | Jul 1, 1995 – Dec 31, 1995 | 5 | 0.148 mg/l | DS000 | Accepted |
| Lead | Jul 1, 1995 – Dec 31, 1995 | 5 | 0.008 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1994 – Jun 30, 1994 | 20 | 0 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1994 – Jun 30, 1994 | 20 | 0 mg/l | DS000 | Accepted |
| Copper | Jul 1, 1993 – Dec 31, 1993 | 10 | 0.069 mg/l | DS000 | Accepted |
| Lead | Jul 1, 1993 – Dec 31, 1993 | 10 | 0.005 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.