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 181–190 of 221 samples, newest first — collected February 24, 1994 to June 22, 1995. 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 |
|---|---|---|
|
||
| 0.147 mg/l , sample collected Jun 22, 1995, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.001 mg/l , sample collected Jun 22, 1995, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.726 mg/l , sample collected Feb 24, 1994, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.004 mg/l , sample collected Feb 24, 1994, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.051 mg/l , sample collected Feb 24, 1994, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.001 mg/l , sample collected Feb 24, 1994, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.495 mg/l , sample collected Feb 24, 1994, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.009 mg/l , sample collected Feb 24, 1994, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.175 mg/l , sample collected Feb 24, 1994, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.007 mg/l , sample collected Feb 24, 1994, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.126 mg/l , sample collected Feb 24, 1994, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.007 mg/l , sample collected Feb 24, 1994, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.303 mg/l , sample collected Feb 24, 1994, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.005 mg/l , sample collected Feb 24, 1994, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.153 mg/l , sample collected Feb 24, 1994, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.002 mg/l , sample collected Feb 24, 1994, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.076 mg/l , sample collected Feb 24, 1994, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.001 mg/l , sample collected Feb 24, 1994, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| Not detected below 0.02 mg/l Method Detection Limit , sample collected Feb 24, 1994, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.001 mg/l , sample collected Feb 24, 1994, sampling point DS000 | Lead 1030 | Not recorded |
-
- Collected
- Jun 22, 1995
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 950623-041L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.147 mg/l
-
Lead 1030
- Result
- 0.001 mg/l
-
- Collected
- Feb 24, 1994
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 940225-193L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.726 mg/l
-
Lead 1030
- Result
- 0.004 mg/l
-
- Collected
- Feb 24, 1994
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 940225-192L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.051 mg/l
-
Lead 1030
- Result
- 0.001 mg/l
-
- Collected
- Feb 24, 1994
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 940225-189L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.495 mg/l
-
Lead 1030
- Result
- 0.009 mg/l
-
- Collected
- Feb 24, 1994
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 940225-188L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.175 mg/l
-
Lead 1030
- Result
- 0.007 mg/l
-
- Collected
- Feb 24, 1994
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 940225-187L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.126 mg/l
-
Lead 1030
- Result
- 0.007 mg/l
-
- Collected
- Feb 24, 1994
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 940225-185L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.303 mg/l
-
Lead 1030
- Result
- 0.005 mg/l
-
- Collected
- Feb 24, 1994
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 940225-184L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.153 mg/l
-
Lead 1030
- Result
- 0.002 mg/l
-
- Collected
- Feb 24, 1994
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 940225-183L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.076 mg/l
-
Lead 1030
- Result
- 0.001 mg/l
-
- Collected
- Feb 24, 1994
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 940225-182L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- Not detected below 0.02 mg/l Method Detection Limit
-
Lead 1030
- Result
- 0.001 mg/l
Routine (10).