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
51–76 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, 2002 – Jun 30, 2002 | 5 | 0.606 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2002 – Jun 30, 2002 | 5 | 0.002 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2001 – Dec 31, 2001 | 5 | 1.613 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2001 – Dec 31, 2001 | 5 | 0.003 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2001 – Jun 30, 2001 | 5 | 0.033 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2001 – Jun 30, 2001 | 5 | 0.011 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2000 – Dec 31, 2000 | 5 | 0.27 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2000 – Dec 31, 2000 | 5 | 0.003 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2000 – Jun 30, 2000 | 5 | 1.772 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2000 – Jun 30, 2000 | 5 | 0.01 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1999 – Jun 30, 1999 | 5 | 2.091 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1999 – Jun 30, 1999 | 5 | 0.004 mg/l | DS000 | Accepted |
| Copper | Jul 1, 1996 – Dec 31, 1996 | 5 | 0.091 mg/l | DS000 | Accepted |
| Lead | Jul 1, 1996 – Dec 31, 1996 | 5 | 0.001 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1996 – Jun 30, 1996 | 5 | 2.707 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1996 – Jun 30, 1996 | 5 | 0.002 mg/l | DS000 | Accepted |
| Copper | Jul 1, 1995 – Dec 31, 1995 | 5 | 3.067 mg/l | DS000 | Accepted |
| Lead | Jul 1, 1995 – Dec 31, 1995 | 5 | 0.004 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1995 – Jun 30, 1995 | 5 | 3.5 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1995 – Jun 30, 1995 | 5 | 0.002 mg/l | DS000 | Accepted |
| Copper | Jul 1, 1994 – Dec 31, 1994 | 5 | 4.077 mg/l | DS000 | Accepted |
| Lead | Jul 1, 1994 – Dec 31, 1994 | 5 | 0.006 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1994 – Jun 30, 1994 | 5 | 0.933 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1994 – Jun 30, 1994 | 5 | 0.004 mg/l | DS000 | Accepted |
| Copper | Jul 1, 1993 – Dec 31, 1993 | 5 | 3.848 mg/l | DS000 | Accepted |
| Lead | Jul 1, 1993 – Dec 31, 1993 | 5 | 0.017 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.