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
MS0270021 , Humphreys Co W/A #5-Woodyard
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, 2021 – Dec 31, 2023 | 5 | 0.067 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2021 – Dec 31, 2023 | 5 | 0.001 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2018 – Dec 31, 2020 | 5 | 0.1383 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2018 – Dec 31, 2020 | 5 | 0.0028 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2015 – Dec 31, 2017 | 5 | 0.3265 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2015 – Dec 31, 2017 | 5 | 0.0025 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2012 – Dec 31, 2014 | 5 | 0.1218 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2012 – Dec 31, 2014 | 5 | 0.0026 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2009 – Dec 31, 2011 | 5 | 0.2197 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2009 – Dec 31, 2011 | 5 | 0.0008 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2006 – Dec 31, 2008 | 5 | 0.1883 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2006 – Dec 31, 2008 | 5 | 0.0013 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2003 – Dec 31, 2005 | 5 | 0.1612 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2003 – Dec 31, 2005 | 5 | 0.0049 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2000 – Dec 31, 2002 | 5 | 0.059 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 | 0.241 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 | 0.204 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1995 – Dec 31, 1995 | 5 | 0.005 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1994 – Jun 30, 1994 | 5 | 0.293 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1994 – Jun 30, 1994 | 5 | 0.003 mg/l | DS000 | Accepted |
| Copper | Jul 1, 1993 – Dec 31, 1993 | 5 | 0.234 mg/l | DS000 | Accepted |
| Lead | Jul 1, 1993 – Dec 31, 1993 | 5 | 0.009 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.