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 91–100 of 255 samples, newest first — collected August 14, 2017 to June 26, 2019. The summary above covers all 255.
37 results from the 10 samples listed here: 12 detected, 25 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.
| Result | Analyte | Monitoring period |
|---|---|---|
|
||
| 0.0287 mg/l , sample collected Jun 26, 2019 08:00, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| 0.0061 mg/l , sample collected Jun 26, 2019 08:00, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
|
||
| 0.0036 mg/l , sample collected Jun 26, 2019 06:00, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 26, 2019 06:00, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
|
||
| 0.0009 mg/l , sample collected Jun 26, 2019 07:00, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 26, 2019 07:00, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
|
||
| 0.0049 mg/l , sample collected Jun 26, 2019 08:00, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 26, 2019 08:00, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
|
||
| 0.0061 mg/l , sample collected Jun 26, 2019 05:30, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 26, 2019 05:30, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
|
||
| 0.0036 mg/l , sample collected Jun 26, 2019 07:45, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 26, 2019 07:45, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 20, 2019 02:00, sampling point TF080 | Arsenic 1005 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| 0.0226 mg/l , sample collected May 20, 2019 02:00, sampling point TF080 | Barium 1010 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 20, 2019 02:00, sampling point TF080 | Cadmium 1015 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 20, 2019 02:00, sampling point TF080 | Chromium 1020 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| 1.01 mg/l , sample collected May 20, 2019 02:00, sampling point TF080 | Fluoride 1025 EPA method 300.0 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 20, 2019 02:00, sampling point TF080 | Mercury 1035 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| 0.0007 mg/l , sample collected May 20, 2019 02:00, sampling point TF080 | Nickel 1036 EPA method 200.8 | Not recorded |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 20, 2019 02:00, sampling point TF080 | Selenium 1045 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 20, 2019 02:00, sampling point TF080 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 20, 2019 02:00, sampling point TF080 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 20, 2019 02:00, sampling point TF080 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 9, 2018 14:00, sampling point TF080 | Nitrate-Nitrite 1038 EPA method QC10107041C | Jan 1, 2018 – Dec 31, 2018 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 9, 2018 14:00, sampling point TF080 | Nitrate 1040 EPA method QC10107041C | Jan 1, 2018 – Dec 31, 2018 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 9, 2018 14:00, sampling point TF080 | Nitrite 1041 EPA method QC10107041C | Jan 1, 2018 – Dec 31, 2018 |
|
||
| 0.003 mg/l , sample collected Aug 14, 2017 13:50, sampling point MRT000 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 14, 2017 13:50, sampling point MRT000 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 14, 2017 13:50, sampling point MRT000 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 14, 2017 13:50, sampling point MRT000 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 14, 2017 13:50, sampling point MRT000 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 0.003 mg/l , sample collected Aug 14, 2017 13:50, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 | Jan 1, 2015 – Dec 31, 2017 |
|
||
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 14, 2017 13:50, sampling point MRT000 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 14, 2017 13:50, sampling point MRT000 | Bromoform 2942 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 14, 2017 13:50, sampling point MRT000 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 14, 2017 13:50, sampling point MRT000 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| Not detected below 4 ug/l Minimum Reporting Level , sample collected Aug 14, 2017 13:50, sampling point MRT000 | TTHM 2950 | Jan 1, 2015 – Dec 31, 2017 |
-
- Collected
- Jun 26, 2019 08:00
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 190702-019PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0287 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0061 mg/l
-
- Collected
- Jun 26, 2019 06:00
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 190702-018PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0036 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jun 26, 2019 07:00
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 190702-017PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0009 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jun 26, 2019 08:00
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 190702-016PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0049 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jun 26, 2019 05:30
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 190702-015PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0061 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jun 26, 2019 07:45
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 190702-014PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0036 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- May 20, 2019 02:00
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 190521-034IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Barium 1010 EPA method 200.8
- Result
- 0.0226 mg/l
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Chromium 1020 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Fluoride 1025 EPA method 300.0
- Result
- 1.01 mg/l
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Nickel 1036 EPA method 200.8
- Result
- 0.0007 mg/l
- Monitoring period
- Not recorded
-
Selenium 1045 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
- Collected
- Apr 9, 2018 14:00
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 180410-046NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2018 – Dec 31, 2018
-
Nitrate-Nitrite 1038 EPA method QC10107041C
- Result
- Not detected below 0.1 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method QC10107041C
- Result
- Not detected below 0.08 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method QC10107041C
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Aug 14, 2017 13:50
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 170815-013HA
- Laboratory
- MSDH Lab
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- 0.003 mg/l
- Monitoring period
- Not recorded
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Total Haloacetic Acids (Haa5) 2456
- Result
- 0.003 mg/l
- Monitoring period
- Jan 1, 2015 – Dec 31, 2017
-
- Collected
- Aug 14, 2017 13:50
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 170815-013TH
- Laboratory
- MSDH Lab
-
Chloroform 2941 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
TTHM 2950
- Result
- Not detected below 4 ug/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2015 – Dec 31, 2017
Routine (10).