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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.

Every analyte ever detected for City of Louisville, with how many results found it and when it was first and last detected. Covers the whole record, not only 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 131–140 of 255 samples, newest first — collected August 6, 2013 to August 6, 2013. The summary above covers all 255.

20 results from the 10 samples listed here: 8 detected, 12 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.

Chemical and radiological sample results for City of Louisville, every result from 131 to 140 of 255 samples shown, newest first. Not detected means the amount was below the level the laboratory can reliably report, which is given beside it.
Result Analyte Monitoring period
Collected
Aug 6, 2013 07:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130807-044PB
Laboratory
MSDH Lab
0.0072 mg/l , sample collected Aug 6, 2013 07:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 6, 2013 07:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Aug 6, 2013 05:45
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130807-043PB
Laboratory
MSDH Lab
0.0145 mg/l , sample collected Aug 6, 2013 05:45, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 6, 2013 05:45, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Aug 6, 2013 04:50
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130807-038PB
Laboratory
MSDH Lab
0.0042 mg/l , sample collected Aug 6, 2013 04:50, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 6, 2013 04:50, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Aug 6, 2013 06:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130807-037PB
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 6, 2013 06:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 6, 2013 06:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Aug 6, 2013 05:45
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130807-036PB
Laboratory
MSDH Lab
0.0059 mg/l , sample collected Aug 6, 2013 05:45, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 6, 2013 05:45, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Aug 6, 2013 09:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130807-035PB
Laboratory
MSDH Lab
0.0077 mg/l , sample collected Aug 6, 2013 09:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 6, 2013 09:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Aug 6, 2013 06:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130807-034PB
Laboratory
MSDH Lab
0.0058 mg/l , sample collected Aug 6, 2013 06:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 6, 2013 06:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Aug 6, 2013 07:03
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130807-033PB
Laboratory
MSDH Lab
0.0013 mg/l , sample collected Aug 6, 2013 07:03, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 6, 2013 07:03, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Aug 6, 2013 07:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130807-020PB
Laboratory
MSDH Lab
0.0058 mg/l , sample collected Aug 6, 2013 07:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 6, 2013 07:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Aug 6, 2013 04:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130807-019PB
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 6, 2013 04:30, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 6, 2013 04:30, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013

Routine (10).