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
MS0350024 , Porterville W/A-Kemper Springs
1–50 of 76 monitoring periods, newest first. 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 | 0.334 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2021 – Dec 31, 2023 | 5 | 0.000829 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2020 – Dec 31, 2020 | 5 | 0.544 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2020 – Dec 31, 2020 | 5 | 0 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2019 – Dec 31, 2019 | 5 | 0.3407 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2019 – Dec 31, 2019 | 5 | 0 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2018 – Dec 31, 2018 | 5 | 0.1208 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2018 – Dec 31, 2018 | 5 | 0 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2017 – Dec 31, 2017 | 10 | 0.5227 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2017 – Dec 31, 2017 | 10 | 0.0017 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2017 – Jun 30, 2017 | 10 | 0.4031 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2017 – Jun 30, 2017 | 10 | 0.001 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2016 – Dec 31, 2016 | 11 | 1.482 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2016 – Dec 31, 2016 | 11 | 0.005 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2016 – Jun 30, 2016 | 10 | 0.2142 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2016 – Jun 30, 2016 | 10 | 0.0013 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2015 – Dec 31, 2015 | 10 | 0.3969 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2015 – Dec 31, 2015 | 10 | 0.0006 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2015 – Jun 30, 2015 | 10 | 2.24 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2015 – Jun 30, 2015 | 10 | 0.001 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2014 – Dec 31, 2014 | 10 | 0.1697 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2014 – Dec 31, 2014 | 10 | 0 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2014 – Jun 30, 2014 | 10 | 0.4773 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2014 – Jun 30, 2014 | 10 | 0.0012 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2013 – Dec 31, 2013 | 10 | 6.9756 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2013 – Dec 31, 2013 | 10 | 0.0048 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2013 – Jun 30, 2013 | 10 | 1.7145 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2013 – Jun 30, 2013 | 10 | 0.0008 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2012 – Dec 31, 2012 | 10 | 0.3338 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2012 – Dec 31, 2012 | 10 | 0.0006 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2011 – Dec 31, 2011 | 5 | 1.4123 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2011 – Dec 31, 2011 | 5 | 0 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2010 – Dec 31, 2010 | 5 | 0.8982 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2010 – Dec 31, 2010 | 5 | 0.0022 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2009 – Dec 31, 2009 | 10 | 0.9013 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 | 0.9186 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2009 – Jun 30, 2009 | 10 | 0.0007 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2008 – Dec 31, 2008 | 10 | 1.9996 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2008 – Dec 31, 2008 | 10 | 0.0016 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2004 – Dec 31, 2004 | 5 | 9.6124 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2004 – Dec 31, 2004 | 5 | 0.0037 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2004 – Jun 30, 2004 | 5 | 5.2852 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2004 – Jun 30, 2004 | 5 | 0.0024 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2003 – Dec 31, 2003 | 5 | 6.682 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2003 – Dec 31, 2003 | 5 | 0.003 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2003 – Jun 30, 2003 | 5 | 4.663 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2003 – Jun 30, 2003 | 5 | 0.002 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2002 – Dec 31, 2002 | 5 | 4.561 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2002 – Dec 31, 2002 | 5 | 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.