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
MS0450034 , Cmu - Lake Caroline
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 | 9 | 0.28 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2022 – Dec 31, 2024 | 9 | 0.0012 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2019 – Dec 31, 2021 | 10 | 0.417 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2019 – Dec 31, 2021 | 10 | 0.0039 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2016 – Dec 31, 2018 | 12 | 0.2449 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2016 – Dec 31, 2018 | 12 | 0.0067 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2013 – Dec 31, 2015 | 10 | 0.3646 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2013 – Dec 31, 2015 | 10 | 0.0052 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2010 – Dec 31, 2012 | 11 | 0.465 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2010 – Dec 31, 2012 | 11 | 0.0037 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2007 – Dec 31, 2009 | 11 | 0.4575 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2007 – Dec 31, 2009 | 11 | 0.0066 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2003 – Dec 31, 2003 | 5 | 0.402 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2003 – Dec 31, 2003 | 5 | 0.003 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2002 – Dec 31, 2002 | 5 | 0.336 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2002 – Dec 31, 2002 | 5 | 0.002 mg/l | DS000 | Accepted |
| Copper | Jul 1, 2001 – Dec 31, 2001 | 5 | 0.458 mg/l | DS000 | Accepted |
| Lead | Jul 1, 2001 – Dec 31, 2001 | 5 | 0.005 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2001 – Jun 30, 2001 | 5 | 0.346 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2001 – Jun 30, 2001 | 5 | 0.003 mg/l | DS000 | Accepted |
| Copper | Jan 1, 2000 – Dec 31, 2000 | 5 | 0.353 mg/l | DS000 | Accepted |
| Lead | Jan 1, 2000 – Dec 31, 2000 | 5 | 0.029 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1996 – Dec 31, 1996 | 5 | 0.365 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1996 – Dec 31, 1996 | 5 | 0.002 mg/l | DS000 | Accepted |
| Copper | Jul 1, 1995 – Dec 31, 1995 | 5 | 1.089 mg/l | DS000 | Accepted |
| Lead | Jul 1, 1995 – Dec 31, 1995 | 5 | 0.003 mg/l | DS000 | Accepted |
| Copper | Jan 1, 1995 – Jun 30, 1995 | 5 | 0.668 mg/l | DS000 | Accepted |
| Lead | Jan 1, 1995 – Jun 30, 1995 | 5 | 0 mg/l | DS000 | Accepted |
| Copper | Jul 1, 1994 – Dec 31, 1994 | 10 | 1.253 mg/l | DS000 | Accepted |
| Lead | Jul 1, 1994 – Dec 31, 1994 | 10 | 0.025 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.