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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

MS0170010 , Horn Lake Water Association

27 of the 61 analytes this system has been tested for have been detected at least once, across 426 samples on record.

The other 34 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 426 samples on record, detections range from August 10, 1993 to February 24, 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 Horn Lake Water Association, 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 196 of 233 results Aug 10, 1993 Jul 22, 2024
Lead 1030 Inorganic Chemical 62 of 233 results Aug 10, 1993 Jul 20, 2021
Nitrate-Nitrite 1038 Inorganic Chemical 32 of 33 results May 5, 2004 Feb 24, 2026
Nitrate 1040 Inorganic Chemical 32 of 33 results May 5, 2004 Feb 24, 2026
Barium 1010 Inorganic Chemical 20 of 20 results Apr 16, 2002 Feb 6, 2024
Fluoride 1025 Inorganic Chemical 17 of 20 results Apr 16, 2002 Feb 6, 2024
Chromium 1020 Inorganic Chemical 12 of 20 results Apr 16, 2002 Feb 6, 2024
Nickel 1036 Inorganic Chemical 10 of 20 results Apr 16, 2002 Jan 9, 2024
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 8 of 40 results Jul 10, 2007 Jun 6, 2018
TTHM 2950 Organic Chemical 7 of 41 results Jul 10, 2007 Aug 17, 2020
Sodium 1052 Inorganic Chemical 6 of 6 results Sep 17, 2019 Nov 4, 2024
Dibromochloromethane 2944 Organic Chemical 6 of 32 results Sep 16, 2008 Aug 17, 2020
Monochloroacetic Acid 2450 Organic Chemical 6 of 30 results Jun 7, 2012 Jun 6, 2018
Combined Radium (-226 & -228) 4010 Radionuclide 5 of 6 results Sep 30, 2009 Jul 20, 2020
Radium-228 4030 Radionuclide 4 of 6 results Sep 30, 2009 Jul 20, 2020
Gross Alpha Particle Activity 4109 Radionuclide 4 of 6 results Sep 30, 2009 Sep 11, 2012
Radium-226 4020 Radionuclide 3 of 6 results Sep 30, 2009 Jan 23, 2018
Bromodichloromethane 2943 Organic Chemical 2 of 32 results Aug 17, 2020 Aug 17, 2020
Gross Alpha, Incl. Radon & U 4002 Radionuclide 2 of 2 results Jan 23, 2018 Jul 20, 2020
Bromoform 2942 Organic Chemical 2 of 32 results Sep 16, 2008 Jul 11, 2012
Gross Alpha, Excl. Radon & U 4000 Radionuclide 2 of 4 results Sep 30, 2009 Mar 12, 2010
Gross Beta Particle Activity 4100 Radionuclide 2 of 2 results Sep 30, 2009 Mar 12, 2010
Selenium 1045 Inorganic Chemical 2 of 20 results Jan 26, 2004 Jan 23, 2006
Arsenic 1005 Inorganic Chemical 1 of 20 results Apr 2, 2008 Apr 2, 2008
Nitrite 1041 Inorganic Chemical 1 of 33 results Jun 14, 2006 Jun 14, 2006
Cadmium 1015 Inorganic Chemical 1 of 20 results Jan 23, 2006 Jan 23, 2006
Sulfate 1055 Inorganic Chemical 1 of 3 results Sep 10, 2003 Sep 10, 2003

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 426 samples, newest first — collected July 18, 2023 to March 13, 2024. The summary above covers all 426.

44 results from the 10 samples listed here: 14 detected, 30 not detected. Across the whole record it is 446 of 1,795. 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 2 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 Horn Lake Water Association, every result from 31 to 40 of 426 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
Mar 13, 2024 12:10
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
TH-240314-001
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 13, 2024 12:10, sampling point SM1 TTHM 2950 EPA method 524.2 Not recorded
Collected
Mar 13, 2024 11:50
Sampling point
SM2 Location withheld
Sample type
Routine
Lab sample
HA-240314-002
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 13, 2024 11:50, sampling point SM2 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded
Collected
Mar 13, 2024 12:05
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
HA-240314-001
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 13, 2024 12:05, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded
Collected
Feb 6, 2024 09:10
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
IN-240207-054
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 6, 2024 09:10, sampling point TF080 Arsenic 1005 EPA method 200.8 Jan 1, 2024 – Dec 31, 2024
0.022 mg/l , sample collected Feb 6, 2024 09:10, sampling point TF080 Barium 1010 EPA method 200.8 Jan 1, 2024 – Dec 31, 2024
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 6, 2024 09:10, sampling point TF080 Cadmium 1015 EPA method 200.8 Jan 1, 2024 – Dec 31, 2024
0.0014 mg/l , sample collected Feb 6, 2024 09:10, sampling point TF080 Chromium 1020 EPA method 200.8 Jan 1, 2024 – Dec 31, 2024
0.492 mg/l , sample collected Feb 6, 2024 09:10, sampling point TF080 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2024 – Dec 31, 2024
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 6, 2024 09:10, sampling point TF080 Mercury 1035 EPA method 200.8 Jan 1, 2024 – Dec 31, 2024
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 6, 2024 09:10, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Feb 6, 2024 09:10, sampling point TF080 Selenium 1045 EPA method 200.8 Jan 1, 2024 – Dec 31, 2024
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 6, 2024 09:10, sampling point TF080 Antimony, Total 1074 EPA method 200.8 Jan 1, 2024 – Dec 31, 2024
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 6, 2024 09:10, sampling point TF080 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2024 – Dec 31, 2024
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 6, 2024 09:10, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Jan 1, 2024 – Dec 31, 2024
Collected
Jan 29, 2024 10:30
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
NI-240130-022
Laboratory
MSDH Lab
0.672 mg/l , sample collected Jan 29, 2024 10:30, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
0.672 mg/l , sample collected Jan 29, 2024 10:30, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 29, 2024 10:30, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Collected
Jan 29, 2024 11:30
Sampling point
TF081
Sample type
Routine
Lab sample
NI-240130-021
Laboratory
MSDH Lab
0.3 mg/l , sample collected Jan 29, 2024 11:30, sampling point TF081 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
0.3 mg/l , sample collected Jan 29, 2024 11:30, sampling point TF081 Nitrate 1040 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 29, 2024 11:30, sampling point TF081 Nitrite 1041 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Collected
Jan 9, 2024 14:10
Sampling point
TF081
Sample type
Routine
Lab sample
IN-240110-005
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 9, 2024 14:10, sampling point TF081 Arsenic 1005 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
0.0221 mg/l , sample collected Jan 9, 2024 14:10, sampling point TF081 Barium 1010 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 9, 2024 14:10, sampling point TF081 Cadmium 1015 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
0.0012 mg/l , sample collected Jan 9, 2024 14:10, sampling point TF081 Chromium 1020 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
0.717 mg/l , sample collected Jan 9, 2024 14:10, sampling point TF081 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2022 – Dec 31, 2024
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 9, 2024 14:10, sampling point TF081 Mercury 1035 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
0.0006 mg/l , sample collected Jan 9, 2024 14:10, sampling point TF081 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Jan 9, 2024 14:10, sampling point TF081 Selenium 1045 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 9, 2024 14:10, sampling point TF081 Antimony, Total 1074 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 9, 2024 14:10, sampling point TF081 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 9, 2024 14:10, sampling point TF081 Thallium, Total 1085 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Oct 31, 2023 12:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
IN-231101-012
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 31, 2023 12:00, sampling point TF080 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
0.0224 mg/l , sample collected Oct 31, 2023 12:00, sampling point TF080 Barium 1010 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 31, 2023 12:00, sampling point TF080 Cadmium 1015 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 31, 2023 12:00, sampling point TF080 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
0.775 mg/l , sample collected Oct 31, 2023 12:00, sampling point TF080 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2023 – Dec 31, 2023
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 31, 2023 12:00, sampling point TF080 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
0.0005 mg/l , sample collected Oct 31, 2023 12:00, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Oct 31, 2023 12:00, sampling point TF080 Selenium 1045 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 31, 2023 12:00, sampling point TF080 Antimony, Total 1074 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 31, 2023 12:00, sampling point TF080 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 31, 2023 12:00, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
Collected
Jul 18, 2023 11:20
Sampling point
SM2 Location withheld
Sample type
Routine
Lab sample
HA-230719-006
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 18, 2023 11:20, sampling point SM2 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2023 – Dec 31, 2023
Collected
Jul 18, 2023 10:50
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
HA-230719-005
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 18, 2023 10:50, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2023 – Dec 31, 2023

Routine (10).