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 211–220 of 255 samples, newest first — collected November 29, 2005 to September 18, 2007. The summary above covers all 255.
32 results from the 10 samples listed here: 10 detected, 22 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 |
|---|---|---|
|
||
| 0.0598 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 |
|
||
| 0.1005 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 |
|
||
| 0.0583 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 |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jul 23, 2007, sampling point TF080 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2007 – Dec 31, 2007 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jul 23, 2007, sampling point TF080 | Nitrate 1040 EPA method 353.2 | Jan 1, 2007 – Dec 31, 2007 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jul 23, 2007, sampling point TF080 | Nitrite 1041 EPA method 353.2 | Jan 1, 2007 – Dec 31, 2007 |
|
||
| 0.0012 mg/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 Oct 4, 2006, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Jan 1, 2006 – Dec 31, 2008 |
|
||
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Oct 4, 2006, sampling point MRT000 | Chloroform 2941 EPA method 551.1 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Oct 4, 2006, sampling point MRT000 | Bromoform 2942 EPA method 551.1 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Oct 4, 2006, sampling point MRT000 | Bromodichloromethane 2943 EPA method 551.1 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Oct 4, 2006, sampling point MRT000 | Dibromochloromethane 2944 EPA method 551.1 | Not recorded |
| 0 This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded a value but no unit of measure for it. The unit is NOT inferable from the analyte: many analytes are reported in more than one unit — TTHM and HAA5 in both MG/L and UG/L — so there is no per-analyte default to fall back on. The number is published as it stands and must not be compared to a limit. 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 Oct 4, 2006, sampling point MRT000 | TTHM 2950 EPA method 551.1 | Jan 1, 2006 – Dec 31, 2008 |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Aug 7, 2006, sampling point TF080 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2006 – Dec 31, 2006 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Aug 7, 2006, sampling point TF080 | Nitrate 1040 EPA method 353.2 | Jan 1, 2006 – Dec 31, 2006 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Aug 7, 2006, sampling point TF080 | Nitrite 1041 EPA method 353.2 | Jan 1, 2006 – Dec 31, 2006 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 18, 2006, sampling point TF080 | Arsenic 1005 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.026576 mg/l , sample collected Apr 18, 2006, sampling point TF080 | Barium 1010 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Apr 18, 2006, sampling point TF080 | Cadmium 1015 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 18, 2006, sampling point TF080 | Chromium 1020 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.662548 mg/l , sample collected Apr 18, 2006, sampling point TF080 | Fluoride 1025 EPA method 380-75WE | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0002 mg/l Minimum Reporting Level , sample collected Apr 18, 2006, sampling point TF080 | Mercury 1035 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.000689 mg/l , sample collected Apr 18, 2006, sampling point TF080 | Nickel 1036 EPA method 200.8 | Not recorded |
| 0.000525 mg/l , sample collected Apr 18, 2006, sampling point TF080 | Selenium 1045 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 18, 2006, sampling point TF080 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Apr 18, 2006, sampling point TF080 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 18, 2006, sampling point TF080 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 18, 2006, sampling point TF080 | Uranium-238 4009 | Not recorded |
|
||
| Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Apr 17, 2006, sampling point TF080 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2005 – Dec 31, 2007 |
|
||
| 0 mg/l This result is recorded as a detection, and the figure the agency wrote — ".000" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. 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 Nov 29, 2005, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Jan 1, 2005 – Dec 31, 2005 |
-
- Collected
- Sep 18, 2007
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 070919-250PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0598 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
- 070919-246PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.1005 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
- 070919-238PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0583 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jul 23, 2007
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 070724-052NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2007 – Dec 31, 2007
-
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
- Oct 4, 2006
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 061005-008HA
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2006 – Dec 31, 2008
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- 0.0012 mg/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.
-
- Collected
- Oct 4, 2006
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 061005-007TH
- Laboratory
- MSDH Lab
-
Chloroform 2941 EPA method 551.1
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 551.1
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 551.1
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 551.1
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 551.1
- Result
- 0 This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded a value but no unit of measure for it. The unit is NOT inferable from the analyte: many analytes are reported in more than one unit — TTHM and HAA5 in both MG/L and UG/L — so there is no per-analyte default to fall back on. The number is published as it stands and must not be compared to a limit. 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
- Jan 1, 2006 – Dec 31, 2008
-
- Collected
- Aug 7, 2006
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 060808-017NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2006 – Dec 31, 2006
-
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
- Apr 18, 2006
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 060419-047IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Barium 1010 EPA method 200.8
- Result
- 0.026576 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0001 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Chromium 1020 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Fluoride 1025 EPA method 380-75WE
- Result
- 0.662548 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0002 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Nickel 1036 EPA method 200.8
- Result
- 0.000689 mg/l
- Monitoring period
- Not recorded
-
Selenium 1045 EPA method 200.8
- Result
- 0.000525 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0001 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Uranium-238 4009
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
- Collected
- Apr 17, 2006
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 060418-004CN
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 0.005 mg/l Minimum Reporting Level
-
- Collected
- Nov 29, 2005
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 051130-003HA
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2005
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- 0 mg/l This result is recorded as a detection, and the figure the agency wrote — ".000" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. 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.
Routine (10).