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 11–20 of 221 samples, newest first — collected February 13, 2025 to August 26, 2025. The summary above covers all 221.
45 results from the 10 samples listed here: 24 detected, 21 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.
We withheld the location of 6 sampling points below. The location on record identifies a private home, and we do not publish those. That is our decision, not the agency’s. The sampling point, its type and every result taken there are published unchanged.
| Result | Analyte | Monitoring period |
|---|---|---|
|
||
| 0.103 mg/l , sample collected Aug 26, 2025 12:27, sampling point LC0022 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
| 9.2 ug/l , sample collected Aug 26, 2025 12:27, sampling point LC0022 | Lead 1030 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
|
||
| 0.0168 mg/l , sample collected Aug 26, 2025 07:30, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 26, 2025 07:30, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
|
||
| 0.0194 mg/l , sample collected Aug 26, 2025 07:00, sampling point LC0009 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 26, 2025 07:00, sampling point LC0009 | Lead 1030 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
|
||
| 0.0017 mg/l , sample collected Aug 26, 2025 08:15, sampling point LC0010 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 26, 2025 08:15, sampling point LC0010 | Lead 1030 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
|
||
| 0.0236 mg/l , sample collected Aug 26, 2025 09:30, sampling point LC0018 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
| 0.9 ug/l , sample collected Aug 26, 2025 09:30, sampling point LC0018 | Lead 1030 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
|
||
| Not detected below 2 ug/l Minimum Reporting Level , sample collected Jun 4, 2025 10:35, sampling point SM1 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| 2.8 ug/l , sample collected Jun 4, 2025 10:35, sampling point SM1 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 4, 2025 10:35, sampling point SM1 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 4, 2025 10:35, sampling point SM1 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| 2.4 ug/l , sample collected Jun 4, 2025 10:35, sampling point SM1 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 5.2 ug/l , sample collected Jun 4, 2025 10:35, sampling point SM1 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Apr 1, 2025 – Jun 30, 2025 |
| 1.1 ug/l , sample collected Jun 4, 2025 10:35, sampling point SM1 | Chloroform 2941 EPA method 524.2 | Not recorded |
| 2 ug/l , sample collected Jun 4, 2025 10:35, sampling point SM1 | Bromoform 2942 EPA method 524.2 | Not recorded |
| 2.2 ug/l , sample collected Jun 4, 2025 10:35, sampling point SM1 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| 3.3 ug/l , sample collected Jun 4, 2025 10:35, sampling point SM1 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 8.6 ug/l , sample collected Jun 4, 2025 10:35, sampling point SM1 | TTHM 2950 EPA method 524.2 | Apr 1, 2025 – Jun 30, 2025 |
|
||
| Not detected below 2 ug/l Minimum Reporting Level , sample collected Jun 4, 2025 10:45, sampling point SM2 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| 2.3 ug/l , sample collected Jun 4, 2025 10:45, sampling point SM2 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 4, 2025 10:45, sampling point SM2 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 4, 2025 10:45, sampling point SM2 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| 2.2 ug/l , sample collected Jun 4, 2025 10:45, sampling point SM2 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 4.5 ug/l , sample collected Jun 4, 2025 10:45, sampling point SM2 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Apr 1, 2025 – Jun 30, 2025 |
| 1.2 ug/l , sample collected Jun 4, 2025 10:45, sampling point SM2 | Chloroform 2941 EPA method 524.2 | Not recorded |
| 2.2 ug/l , sample collected Jun 4, 2025 10:45, sampling point SM2 | Bromoform 2942 EPA method 524.2 | Not recorded |
| 2.4 ug/l , sample collected Jun 4, 2025 10:45, sampling point SM2 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| 3.2 ug/l , sample collected Jun 4, 2025 10:45, sampling point SM2 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 9 ug/l , sample collected Jun 4, 2025 10:45, sampling point SM2 | TTHM 2950 EPA method 524.2 | Apr 1, 2025 – Jun 30, 2025 |
|
||
| Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Apr 30, 2025 10:40, sampling point TF080 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2025 – Dec 31, 2025 |
|
||
| Not detected below 2 ug/l Minimum Reporting Level , sample collected Feb 13, 2025 09:00, sampling point SM1 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 13, 2025 09:00, sampling point SM1 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 13, 2025 09:00, sampling point SM1 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 13, 2025 09:00, sampling point SM1 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 13, 2025 09:00, sampling point SM1 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| Not detected below 2 ug/l Minimum Reporting Level , sample collected Feb 13, 2025 09:00, sampling point SM1 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Jan 1, 2025 – Mar 31, 2025 |
|
||
| Not detected below 2 ug/l Minimum Reporting Level , sample collected Feb 13, 2025 09:55, sampling point SM2 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 13, 2025 09:55, sampling point SM2 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 13, 2025 09:55, sampling point SM2 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 13, 2025 09:55, sampling point SM2 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| 1.5 ug/l , sample collected Feb 13, 2025 09:55, sampling point SM2 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| Not detected below 2 ug/l Minimum Reporting Level , sample collected Feb 13, 2025 09:55, sampling point SM2 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Jan 1, 2025 – Mar 31, 2025 |
-
- Collected
- Aug 26, 2025 12:27
- Sampling point
- LC0022 Location withheld
- Sample type
- Routine
- Lab sample
- PB-250903-006
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2023 – Dec 31, 2025
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.103 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 9.2 ug/l
-
- Collected
- Aug 26, 2025 07:30
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- PB-250903-005
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2023 – Dec 31, 2025
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0168 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
-
- Collected
- Aug 26, 2025 07:00
- Sampling point
- LC0009 Location withheld
- Sample type
- Routine
- Lab sample
- PB-250903-004
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2023 – Dec 31, 2025
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0194 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
-
- Collected
- Aug 26, 2025 08:15
- Sampling point
- LC0010 Location withheld
- Sample type
- Routine
- Lab sample
- PB-250903-003
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2023 – Dec 31, 2025
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0017 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
-
- Collected
- Aug 26, 2025 09:30
- Sampling point
- LC0018 Location withheld
- Sample type
- Routine
- Lab sample
- PB-250903-001
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2023 – Dec 31, 2025
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0236 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.9 ug/l
-
- Collected
- Jun 4, 2025 10:35
- Sampling point
- SM1 Location withheld
- Sample type
- Routine
- Lab sample
- 810-151215-2
- Laboratory
- Eurofins Eaton Analytical South Bend in
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- Not detected below 2 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- 2.8 ug/l
- Monitoring period
- Not recorded
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- 2.4 ug/l
- Monitoring period
- Not recorded
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- 5.2 ug/l
- Monitoring period
- Apr 1, 2025 – Jun 30, 2025
-
Chloroform 2941 EPA method 524.2
- Result
- 1.1 ug/l
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 524.2
- Result
- 2 ug/l
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- 2.2 ug/l
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- 3.3 ug/l
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 524.2
- Result
- 8.6 ug/l
- Monitoring period
- Apr 1, 2025 – Jun 30, 2025
-
- Collected
- Jun 4, 2025 10:45
- Sampling point
- SM2 Location withheld
- Sample type
- Routine
- Lab sample
- 810-151215-1
- Laboratory
- Eurofins Eaton Analytical South Bend in
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- Not detected below 2 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- 2.3 ug/l
- Monitoring period
- Not recorded
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- 2.2 ug/l
- Monitoring period
- Not recorded
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- 4.5 ug/l
- Monitoring period
- Apr 1, 2025 – Jun 30, 2025
-
Chloroform 2941 EPA method 524.2
- Result
- 1.2 ug/l
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 524.2
- Result
- 2.2 ug/l
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- 2.4 ug/l
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- 3.2 ug/l
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 524.2
- Result
- 9 ug/l
- Monitoring period
- Apr 1, 2025 – Jun 30, 2025
-
- Collected
- Apr 30, 2025 10:40
- Sampling point
- TF080 Treatment Plant TF080
- Sample type
- Routine
- Lab sample
- CN-250430-015
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2025 – Dec 31, 2025
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 0.015 mg/l Minimum Reporting Level
-
- Collected
- Feb 13, 2025 09:00
- Sampling point
- SM1 Location withheld
- Sample type
- Routine
- Lab sample
- 810-137972-2
- Laboratory
- Eurofins Eaton Analytical South Bend in
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- Not detected below 2 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- Not detected below 2 ug/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2025 – Mar 31, 2025
-
- Collected
- Feb 13, 2025 09:55
- Sampling point
- SM2 Location withheld
- Sample type
- Routine
- Lab sample
- 810-137972-1
- Laboratory
- Eurofins Eaton Analytical South Bend in
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- Not detected below 2 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- 1.5 ug/l
- Monitoring period
- Not recorded
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- Not detected below 2 ug/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2025 – Mar 31, 2025
Routine (10).