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
MS0470084 , Galena School
51–68 of 68 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, 2001 – Jun 30, 2001 | 10 | 0.243 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2001 – Jun 30, 2001 | 10 | 0.002 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2000 – Dec 31, 2000 | 5 | 2.491 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2000 – Dec 31, 2000 | 5 | 0.006 mg/l | DS000 | Accepted |
| Copper | Jul 1, 1996 – Dec 31, 1996 | 10 | 0.077 mg/l | DS000 | Accepted |
| Lead | Jul 1, 1996 – Dec 31, 1996 | 10 | 0.006 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1996 – Jun 30, 1996 | 10 | 0.435 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1996 – Jun 30, 1996 | 10 | 0.003 mg/l | DS000 | Accepted |
| Copper | Jul 1, 1995 – Dec 31, 1995 | 10 | 1.357 mg/l | DS000 | Accepted |
| Lead | Jul 1, 1995 – Dec 31, 1995 | 10 | 0 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1995 – Jun 30, 1995 | 10 | 1.519 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1995 – Jun 30, 1995 | 10 | 0.006 mg/l | DS000 | Accepted |
| Copper | Jul 1, 1994 – Dec 31, 1994 | 10 | 3.342 mg/l | DS000 | Accepted |
| Lead | Jul 1, 1994 – Dec 31, 1994 | 10 | 0.004 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1994 – Jun 30, 1994 | 10 | 3.418 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1994 – Jun 30, 1994 | 10 | 0.004 mg/l | DS000 | Accepted |
| Copper | Jul 1, 1993 – Dec 31, 1993 | 10 | 1.739 mg/l | DS000 | Accepted |
| Lead | Jul 1, 1993 – Dec 31, 1993 | 10 | 0.004 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.