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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

MS0170022 , City of Horn Lake

31 of the 90 analytes this system has been tested for have been detected at least once, across 830 samples on record.

The other 59 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 830 samples on record, detections range from December 10, 1992 to June 30, 2026. 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 Horn Lake, 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 354 of 376 results Dec 10, 1992 Jul 23, 2024
Lead 1030 Inorganic Chemical 147 of 376 results Dec 10, 1992 Jul 23, 2024
TTHM 2950 Organic Chemical 57 of 64 results Mar 9, 2004 Jun 30, 2026
Barium 1010 Inorganic Chemical 53 of 53 results May 14, 2002 Feb 3, 2025
Nickel 1036 Inorganic Chemical 53 of 53 results May 14, 2002 Feb 3, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 39 of 62 results Oct 13, 2005 Sep 29, 2025
Dibromochloromethane 2944 Organic Chemical 37 of 45 results Jul 26, 2006 Jun 30, 2026
Bromodichloromethane 2943 Organic Chemical 35 of 45 results Jul 26, 2006 Sep 29, 2025
Chloroform 2941 Organic Chemical 32 of 45 results Jul 26, 2006 Sep 29, 2025
Nitrate-Nitrite 1038 Inorganic Chemical 29 of 100 results May 5, 2004 Jun 2, 2026
Nitrate 1040 Inorganic Chemical 29 of 100 results May 5, 2004 Jun 2, 2026
Chromium 1020 Inorganic Chemical 23 of 53 results May 14, 2002 Jan 20, 2021
Dichloroacetic Acid 2451 Organic Chemical 22 of 40 results Jun 25, 2008 Sep 29, 2025
Fluoride 1025 Inorganic Chemical 20 of 55 results Jan 28, 2004 Feb 3, 2025
Bromoform 2942 Organic Chemical 14 of 45 results Jul 1, 2009 Sep 29, 2025
Monochloroacetic Acid 2450 Organic Chemical 13 of 40 results Jun 6, 2012 Aug 24, 2020
Dibromoacetic Acid 2454 Organic Chemical 12 of 40 results Jul 1, 2009 Sep 29, 2025
Sodium 1052 Inorganic Chemical 12 of 12 results Sep 17, 2019 Oct 14, 2024
Selenium 1045 Inorganic Chemical 11 of 53 results Jan 26, 2004 Apr 21, 2008
Cadmium 1015 Inorganic Chemical 10 of 53 results Feb 28, 2005 Apr 21, 2008
Sulfate 1055 Inorganic Chemical 10 of 10 results May 14, 2002 Jan 28, 2004
Xylenes, Total 2955 Organic Chemical 8 of 90 results Aug 31, 2005 Aug 24, 2021
Arsenic 1005 Inorganic Chemical 7 of 53 results Jan 25, 2006 Apr 2, 2008
Radium-226 4020 Radionuclide 6 of 14 results May 1, 2018 Jun 25, 2019
Combined Radium (-226 & -228) 4010 Radionuclide 4 of 14 results May 1, 2018 Jun 25, 2019
Radium-228 4030 Radionuclide 4 of 14 results May 1, 2018 Jun 25, 2019
Gross Alpha, Incl. Radon & U 4002 Radionuclide 3 of 6 results Jun 25, 2019 Jun 25, 2019
Trichloroacetic Acid 2452 Organic Chemical 3 of 40 results Jun 25, 2008 Apr 14, 2014
Thallium, Total 1085 Inorganic Chemical 2 of 53 results Oct 3, 2018 Feb 3, 2025
Monobromoacetic Acid 2453 Organic Chemical 2 of 40 results Jul 19, 2011 Aug 24, 2020
Ethylbenzene 2992 Organic Chemical 2 of 90 results Aug 31, 2005 May 21, 2013

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 31–40 of 830 samples, newest first — collected July 16, 2024 to October 14, 2024. The summary above covers all 830.

37 results from the 10 samples listed here: 20 detected, 17 not detected. Across the whole record it is 1,053 of 4,217. 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 9 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.

Chemical and radiological sample results for City of Horn Lake, every result from 31 to 40 of 830 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
Oct 14, 2024 11:25
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
NA-241015-014
Laboratory
MSDH Lab
8.89 mg/l , sample collected Oct 14, 2024 11:25, sampling point TF080 Sodium 1052 EPA method 200.7 Jan 1, 2022 – Dec 31, 2024
Collected
Sep 4, 2024 09:15
Sampling point
SM2 Location withheld
Sample type
Routine
Lab sample
810-118885-2
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Sep 4, 2024 09:15, sampling point SM2 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 4, 2024 09:15, sampling point SM2 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 4, 2024 09:15, sampling point SM2 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 4, 2024 09:15, sampling point SM2 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 4, 2024 09:15, sampling point SM2 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Sep 4, 2024 09:15, sampling point SM2 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jul 1, 2024 – Sep 30, 2024
0.86 ug/l , sample collected Sep 4, 2024 09:15, sampling point SM2 Chloroform 2941 EPA method 524.2 Not recorded
1.1 ug/l , sample collected Sep 4, 2024 09:15, sampling point SM2 Bromoform 2942 EPA method 524.2 Not recorded
2.4 ug/l , sample collected Sep 4, 2024 09:15, sampling point SM2 Bromodichloromethane 2943 EPA method 524.2 Not recorded
3.8 ug/l , sample collected Sep 4, 2024 09:15, sampling point SM2 Dibromochloromethane 2944 EPA method 524.2 Not recorded
8.16 ug/l , sample collected Sep 4, 2024 09:15, sampling point SM2 TTHM 2950 EPA method 524.2 Jul 1, 2024 – Sep 30, 2024
Collected
Sep 4, 2024 09:40
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
810-118885-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Sep 4, 2024 09:40, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 4, 2024 09:40, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 4, 2024 09:40, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 4, 2024 09:40, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 4, 2024 09:40, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Sep 4, 2024 09:40, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jul 1, 2024 – Sep 30, 2024
2.1 ug/l , sample collected Sep 4, 2024 09:40, sampling point SM1 Chloroform 2941 EPA method 524.2 Not recorded
2.3 ug/l , sample collected Sep 4, 2024 09:40, sampling point SM1 Bromoform 2942 EPA method 524.2 Not recorded
3.1 ug/l , sample collected Sep 4, 2024 09:40, sampling point SM1 Bromodichloromethane 2943 EPA method 524.2 Not recorded
4.3 ug/l , sample collected Sep 4, 2024 09:40, sampling point SM1 Dibromochloromethane 2944 EPA method 524.2 Not recorded
11.8 ug/l , sample collected Sep 4, 2024 09:40, sampling point SM1 TTHM 2950 EPA method 524.2 Jul 1, 2024 – Sep 30, 2024
Collected
Jul 23, 2024 20:45
Sampling point
LC0028 Location withheld
Sample type
Routine
Lab sample
PB-240726-021
Laboratory
MSDH Lab
0.0982 mg/l , sample collected Jul 23, 2024 20:45, sampling point LC0028 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
1.7 ug/l , sample collected Jul 23, 2024 20:45, sampling point LC0028 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 18, 2024 06:10
Sampling point
LC0014 Location withheld
Sample type
Routine
Lab sample
PB-240719-061
Laboratory
MSDH Lab
0.0742 mg/l , sample collected Jul 18, 2024 06:10, sampling point LC0014 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 18, 2024 06:10, sampling point LC0014 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 17, 2024 09:00
Sampling point
LC0004 Location withheld
Sample type
Routine
Lab sample
PB-240718-026
Laboratory
MSDH Lab
0.174 mg/l , sample collected Jul 17, 2024 09:00, sampling point LC0004 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
1.4 ug/l , sample collected Jul 17, 2024 09:00, sampling point LC0004 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 17, 2024 06:53
Sampling point
LC0060 Location withheld
Sample type
Routine
Lab sample
PB-240718-022
Laboratory
MSDH Lab
0.137 mg/l , sample collected Jul 17, 2024 06:53, sampling point LC0060 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 17, 2024 06:53, sampling point LC0060 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 17, 2024 04:00
Sampling point
LC0001 Location withheld
Sample type
Routine
Lab sample
PB-240718-021
Laboratory
MSDH Lab
0.0669 mg/l , sample collected Jul 17, 2024 04:00, sampling point LC0001 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 17, 2024 04:00, sampling point LC0001 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 17, 2024 08:10
Sampling point
LC0002 Location withheld
Sample type
Routine
Lab sample
PB-240719-062
Laboratory
MSDH Lab
0.027 mg/l , sample collected Jul 17, 2024 08:10, sampling point LC0002 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 17, 2024 08:10, sampling point LC0002 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 16, 2024 07:36
Sampling point
LC0055 Location withheld
Sample type
Routine
Lab sample
PB-240718-010
Laboratory
MSDH Lab
0.114 mg/l , sample collected Jul 16, 2024 07:36, sampling point LC0055 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 16, 2024 07:36, sampling point LC0055 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024

Routine (10).