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
MS0170025 , City of Horn Lake - Twin Lakes
22 of the 55 analytes this system has been tested for have been detected at least once, across 221 samples on record.
The other 33 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 221 samples on record, detections range from August 11, 1993 to September 29, 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 | 135 of 141 results | Aug 11, 1993 | Sep 12, 2025 |
| Lead 1030 | Inorganic Chemical | 81 of 141 results | Aug 11, 1993 | Aug 26, 2025 |
| TTHM 2950 | Organic Chemical | 19 of 20 results | Jul 10, 2007 | Sep 29, 2025 |
| Bromodichloromethane 2943 | Organic Chemical | 14 of 15 results | Jul 10, 2007 | Sep 29, 2025 |
| Dibromochloromethane 2944 | Organic Chemical | 14 of 15 results | Jul 10, 2007 | Sep 29, 2025 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 12 of 22 results | Jul 10, 2007 | Sep 29, 2025 |
| Chloroform 2941 | Organic Chemical | 12 of 15 results | Jul 10, 2007 | Sep 29, 2025 |
| Bromoform 2942 | Organic Chemical | 12 of 15 results | Jul 10, 2007 | Sep 29, 2025 |
| Barium 1010 | Inorganic Chemical | 11 of 11 results | Oct 8, 2019 | Feb 7, 2024 |
| Nickel 1036 | Inorganic Chemical | 11 of 11 results | Oct 8, 2019 | Feb 7, 2024 |
| Fluoride 1025 | Inorganic Chemical | 9 of 11 results | Dec 3, 2019 | Feb 7, 2024 |
| Dibromoacetic Acid 2454 | Organic Chemical | 7 of 16 results | Jul 18, 2019 | Sep 29, 2025 |
| Dichloroacetic Acid 2451 | Organic Chemical | 6 of 16 results | Jul 18, 2019 | Sep 29, 2025 |
| Chromium 1020 | Inorganic Chemical | 6 of 11 results | Dec 3, 2019 | Feb 7, 2024 |
| Combined Radium (-226 & -228) 4010 | Radionuclide | 2 of 2 results | Jan 27, 2020 | Jun 16, 2020 |
| Radium-228 4030 | Radionuclide | 2 of 2 results | Jan 27, 2020 | Jun 16, 2020 |
| Monochloroacetic Acid 2450 | Organic Chemical | 1 of 16 results | Jan 27, 2025 | Jan 27, 2025 |
| Nitrite 1041 | Inorganic Chemical | 1 of 9 results | Jan 10, 2022 | Jan 10, 2022 |
| Monobromoacetic Acid 2453 | Organic Chemical | 1 of 16 results | Aug 24, 2020 | Aug 24, 2020 |
| Radium-226 4020 | Radionuclide | 1 of 2 results | Jun 16, 2020 | Jun 16, 2020 |
| Gross Alpha, Incl. Radon & U 4002 | Radionuclide | 1 of 1 result | Jan 27, 2020 | Jan 27, 2020 |
| Sodium 1052 | Inorganic Chemical | 1 of 1 result | Sep 17, 2019 | Sep 17, 2019 |
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 171–180 of 221 samples, newest first — collected June 22, 1995 to June 19, 1996. The summary above covers all 221.
20 results from the 10 samples listed here: 19 detected, 1 not detected. Across the whole record it is 359 of 823. 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 |
|---|---|---|
|
||
| 0.129 mg/l , sample collected Jun 19, 1996, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.003 mg/l , sample collected Jun 19, 1996, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.062 mg/l , sample collected Jun 22, 1995, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.003 mg/l , sample collected Jun 22, 1995, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.112 mg/l , sample collected Jun 22, 1995, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.002 mg/l , sample collected Jun 22, 1995, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.179 mg/l , sample collected Jun 22, 1995, sampling point DS000 | Copper, Free 1022 | Not recorded |
| Not detected below 0.001 mg/l Method Detection Limit , sample collected Jun 22, 1995, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.146 mg/l , sample collected Jun 22, 1995, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.002 mg/l , sample collected Jun 22, 1995, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.307 mg/l , sample collected Jun 22, 1995, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.005 mg/l , sample collected Jun 22, 1995, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.115 mg/l , sample collected Jun 22, 1995, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.002 mg/l , sample collected Jun 22, 1995, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.133 mg/l , sample collected Jun 22, 1995, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.003 mg/l , sample collected Jun 22, 1995, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.142 mg/l , sample collected Jun 22, 1995, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.002 mg/l , sample collected Jun 22, 1995, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.263 mg/l , sample collected Jun 22, 1995, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.002 mg/l , sample collected Jun 22, 1995, sampling point DS000 | Lead 1030 | Not recorded |
-
- Collected
- Jun 19, 1996
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 960620-087L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.129 mg/l
-
Lead 1030
- Result
- 0.003 mg/l
-
- Collected
- Jun 22, 1995
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 950623-055L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.062 mg/l
-
Lead 1030
- Result
- 0.003 mg/l
-
- Collected
- Jun 22, 1995
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 950623-054L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.112 mg/l
-
Lead 1030
- Result
- 0.002 mg/l
-
- Collected
- Jun 22, 1995
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 950623-051L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.179 mg/l
-
Lead 1030
- Result
- Not detected below 0.001 mg/l Method Detection Limit
-
- Collected
- Jun 22, 1995
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 950623-050L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.146 mg/l
-
Lead 1030
- Result
- 0.002 mg/l
-
- Collected
- Jun 22, 1995
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 950623-049L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.307 mg/l
-
Lead 1030
- Result
- 0.005 mg/l
-
- Collected
- Jun 22, 1995
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 950623-045L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.115 mg/l
-
Lead 1030
- Result
- 0.002 mg/l
-
- Collected
- Jun 22, 1995
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 950623-044L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.133 mg/l
-
Lead 1030
- Result
- 0.003 mg/l
-
- Collected
- Jun 22, 1995
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 950623-043L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.142 mg/l
-
Lead 1030
- Result
- 0.002 mg/l
-
- Collected
- Jun 22, 1995
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 950623-042L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.263 mg/l
-
Lead 1030
- Result
- 0.002 mg/l
Routine (10).