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.
Chemical and radiological sample results
MS0800004 , City of Louisville
25 of the 65 analytes this system has been tested for have been detected at least once, across 255 samples on record.
The other 40 were tested for and never found. An analyte is counted here if any result on record measured it, so this covers the whole history and not the samples listed below.
Across all 255 samples on record, detections range from November 3, 2003 to August 26, 2025. These figures cover the whole record.
What counts as a non-detect is defined in the help: Less than Indicator. This system’s violations.
What has been detected, ever
Every analyte measured above its reporting level at any point in this system’s record, most often detected first. This is not limited to the samples listed below.
| Analyte | Kind | Detected in | First detected | Last detected |
|---|---|---|---|---|
| Copper, Free 1022 | Inorganic Chemical | 158 of 160 results | Jun 17, 2004 | Aug 26, 2025 |
| Lead 1030 | Inorganic Chemical | 22 of 160 results | Jun 17, 2004 | Aug 25, 2025 |
| Fluoride 1025 | Inorganic Chemical | 12 of 12 results | Nov 3, 2003 | Apr 8, 2025 |
| Barium 1010 | Inorganic Chemical | 10 of 10 results | Nov 3, 2003 | Apr 8, 2025 |
| TTHM 2950 | Organic Chemical | 9 of 20 results | Aug 30, 2004 | Apr 28, 2025 |
| Nickel 1036 | Inorganic Chemical | 9 of 10 results | Apr 5, 2004 | Apr 8, 2025 |
| Dibromochloromethane 2944 | Organic Chemical | 5 of 14 results | Jun 20, 2011 | Apr 28, 2025 |
| Gross Alpha, Incl. Radon & U 4002 | Radionuclide | 5 of 5 results | Mar 13, 2012 | Oct 9, 2012 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 4 of 20 results | Nov 29, 2005 | Sep 17, 2024 |
| Sodium 1052 | Inorganic Chemical | 4 of 4 results | Sep 18, 2019 | Mar 20, 2023 |
| Sulfate 1055 | Inorganic Chemical | 4 of 4 results | Nov 3, 2003 | Oct 28, 2021 |
| Bromodichloromethane 2943 | Organic Chemical | 3 of 14 results | Aug 28, 2024 | Apr 28, 2025 |
| Bromoform 2942 | Organic Chemical | 3 of 14 results | Jul 16, 2014 | Nov 6, 2024 |
| Chromium 1020 | Inorganic Chemical | 2 of 10 results | Nov 3, 2003 | Apr 8, 2025 |
| Chloroform 2941 | Organic Chemical | 2 of 14 results | Nov 16, 2020 | Aug 28, 2024 |
| Calcium 1016 | Inorganic Chemical | 2 of 2 results | Oct 28, 2021 | Oct 28, 2021 |
| Chloride 1017 | Inorganic Chemical | 2 of 2 results | Oct 28, 2021 | Oct 28, 2021 |
| Conductivity @ 25 C Umhos/CM 1064 | Water Quality | 2 of 2 results | Oct 28, 2021 | Oct 28, 2021 |
| Alkalinity, Total 1927 | Water Quality | 2 of 2 results | Oct 28, 2021 | Oct 28, 2021 |
| Monochloroacetic Acid 2450 | Organic Chemical | 1 of 13 results | Aug 14, 2017 | Aug 14, 2017 |
| Gross Beta Particle Activity 4100 | Radionuclide | 1 of 1 result | Mar 8, 2010 | Mar 8, 2010 |
| Combined Radium (-226 & -228) 4010 | Radionuclide | 1 of 7 results | Sep 25, 2009 | Sep 25, 2009 |
| Radium-226 4020 | Radionuclide | 1 of 7 results | Sep 25, 2009 | Sep 25, 2009 |
| Radium-228 4030 | Radionuclide | 1 of 7 results | Sep 25, 2009 | Sep 25, 2009 |
| Selenium 1045 | Inorganic Chemical | 1 of 10 results | Apr 18, 2006 | Apr 18, 2006 |
No date range is applied: this list draws on every sample on record. Show the last two years only.
The most recent samples, result by result
The table below lists 191–200 of 255 samples, newest first — collected September 18, 2007 to September 25, 2009. The summary above covers all 255.
26 results from the 10 samples listed here: 11 detected, 15 not detected. Across the whole record it is 266 of 869. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.
Units in this table
Radium-226 is recorded on this page in ug/l and pci/l.
Radium-228 is recorded on this page in ug/l and pci/l.
| Result | Analyte | Monitoring period |
|---|---|---|
|
||
| Not detected below 3 pci/l Minimum Reporting Level , sample collected Sep 25, 2009, sampling point TF080 | Gross Alpha, Excl. Radon & U 4000 | Jul 1, 2009 – Sep 30, 2009 |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 25, 2009, sampling point TF080 | Combined Uranium 4006 EPA method 200.8 | Jul 1, 2009 – Sep 30, 2009 |
| 0.55 pci/l The agency recorded which kind of limit this result was below, but stored nothing as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Sep 25, 2009, sampling point TF080 | Combined Radium (-226 & -228) 4010 | Not recorded |
| 0.156 pci/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Sep 25, 2009, sampling point TF080 | Radium-226 4020 EPA method 903 | Jul 1, 2009 – Sep 30, 2009 |
| 0.394 pci/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Sep 25, 2009, sampling point TF080 | Radium-228 4030 EPA method 904 | Jul 1, 2009 – Sep 30, 2009 |
| Not detected below 3 pci/l Minimum Reporting Level , sample collected Sep 25, 2009, sampling point TF080 | Gross Alpha Particle Activity 4109 EPA method 900 | Jul 1, 2009 – Sep 30, 2009 |
|
||
| Not detected below 0.25 mg/l Minimum Reporting Level , sample collected Jun 8, 2009, sampling point TF080 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2009 – Dec 31, 2009 |
| Not detected below 0.2 mg/l Minimum Reporting Level , sample collected Jun 8, 2009, sampling point TF080 | Nitrate 1040 EPA method 353.2 | Jan 1, 2009 – Dec 31, 2009 |
| Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jun 8, 2009, sampling point TF080 | Nitrite 1041 EPA method 353.2 | Jan 1, 2009 – Dec 31, 2009 |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jul 30, 2008, sampling point TF080 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2008 – Dec 31, 2008 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jul 30, 2008, sampling point TF080 | Nitrate 1040 EPA method 353.2 | Jan 1, 2008 – Dec 31, 2008 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jul 30, 2008, sampling point TF080 | Nitrite 1041 EPA method 353.2 | Jan 1, 2008 – Dec 31, 2008 |
|
||
| 0.0694 mg/l , sample collected Sep 18, 2007, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2007, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
|
||
| 0.0207 mg/l , sample collected Sep 18, 2007, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2007, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
|
||
| 0.0239 mg/l , sample collected Sep 18, 2007, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2007, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
|
||
| 0.0257 mg/l , sample collected Sep 18, 2007, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2007, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
|
||
| 0.0037 mg/l , sample collected Sep 18, 2007, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.0007 mg/l , sample collected Sep 18, 2007, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
|
||
| 0.0152 mg/l , sample collected Sep 18, 2007, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2007, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
|
||
| 0.0073 mg/l , sample collected Sep 18, 2007, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2007, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
-
- Collected
- Sep 25, 2009
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 02373-001
- Laboratory
- Laboratory, Ars
-
Gross Alpha, Excl. Radon & U 4000
- Result
- Not detected below 3 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2009 – Sep 30, 2009
-
Combined Uranium 4006 EPA method 200.8
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2009 – Sep 30, 2009
-
Combined Radium (-226 & -228) 4010
- Result
- 0.55 pci/l The agency recorded which kind of limit this result was below, but stored nothing as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType.
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903
- Result
- 0.156 pci/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType.
- Monitoring period
- Jul 1, 2009 – Sep 30, 2009
-
Radium-228 4030 EPA method 904
- Result
- 0.394 pci/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType.
- Monitoring period
- Jul 1, 2009 – Sep 30, 2009
-
Gross Alpha Particle Activity 4109 EPA method 900
- Result
- Not detected below 3 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2009 – Sep 30, 2009
-
- Collected
- Jun 8, 2009
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 090609-073NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2009 – Dec 31, 2009
-
Nitrate-Nitrite 1038 EPA method 353.2
- Result
- Not detected below 0.25 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method 353.2
- Result
- Not detected below 0.2 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method 353.2
- Result
- Not detected below 0.05 mg/l Minimum Reporting Level
-
- Collected
- Jul 30, 2008
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 080731-004NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2008 – Dec 31, 2008
-
Nitrate-Nitrite 1038 EPA method 353.2
- Result
- Not detected below 0.1 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method 353.2
- Result
- Not detected below 0.08 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method 353.2
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Sep 18, 2007
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 070919-442PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0694 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Sep 18, 2007
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 070919-441PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0207 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Sep 18, 2007
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 070919-440PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0239 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Sep 18, 2007
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 070919-439PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0257 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Sep 18, 2007
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 070919-438PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0037 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0007 mg/l
-
- Collected
- Sep 18, 2007
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 070919-437PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0152 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Sep 18, 2007
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 070919-436PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0073 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
Routine (10).