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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 11–20 of 426 samples, newest first — collected July 17, 2024 to July 22, 2024. The summary above covers all 426.

20 results from the 10 samples listed here: 10 detected, 10 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 10 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 11 to 20 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
Jul 22, 2024 06:15
Sampling point
LC0010 Location withheld
Sample type
Routine
Lab sample
PB-240723-009
Laboratory
MSDH Lab
0.0095 mg/l , sample collected Jul 22, 2024 06:15, sampling point LC0010 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 22, 2024 06:15, sampling point LC0010 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 19, 2024 04:49
Sampling point
LC0008 Location withheld
Sample type
Routine
Lab sample
PB-240723-007
Laboratory
MSDH Lab
0.0116 mg/l , sample collected Jul 19, 2024 04:49, sampling point LC0008 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 19, 2024 04:49, sampling point LC0008 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 18, 2024 06:00
Sampling point
LC0015 Location withheld
Sample type
Routine
Lab sample
PB-240723-008
Laboratory
MSDH Lab
0.0204 mg/l , sample collected Jul 18, 2024 06:00, sampling point LC0015 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 06:00, sampling point LC0015 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 18, 2024 04:55
Sampling point
LC0003 Location withheld
Sample type
Routine
Lab sample
PB-240723-004
Laboratory
MSDH Lab
0.0092 mg/l , sample collected Jul 18, 2024 04:55, sampling point LC0003 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 04:55, sampling point LC0003 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 17, 2024 06:15
Sampling point
LC0046 Location withheld
Sample type
Routine
Lab sample
PB-240723-020
Laboratory
MSDH Lab
0.0018 mg/l , sample collected Jul 17, 2024 06:15, sampling point LC0046 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 06:15, sampling point LC0046 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 17, 2024 08:23
Sampling point
LC0007 Location withheld
Sample type
Routine
Lab sample
PB-240723-019
Laboratory
MSDH Lab
0.0094 mg/l , sample collected Jul 17, 2024 08:23, sampling point LC0007 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 08:23, sampling point LC0007 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 17, 2024 06:30
Sampling point
LC0009 Location withheld
Sample type
Routine
Lab sample
PB-240723-018
Laboratory
MSDH Lab
0.0105 mg/l , sample collected Jul 17, 2024 06:30, sampling point LC0009 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 06:30, sampling point LC0009 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 17, 2024 05:30
Sampling point
LC0028 Location withheld
Sample type
Routine
Lab sample
PB-240723-017
Laboratory
MSDH Lab
0.0069 mg/l , sample collected Jul 17, 2024 05:30, sampling point LC0028 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 05:30, sampling point LC0028 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 17, 2024 07:02
Sampling point
LC0017 Location withheld
Sample type
Routine
Lab sample
PB-240723-016
Laboratory
MSDH Lab
0.0086 mg/l , sample collected Jul 17, 2024 07:02, sampling point LC0017 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 07:02, sampling point LC0017 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 17, 2024 07:00
Sampling point
LC0018 Location withheld
Sample type
Routine
Lab sample
PB-240723-015
Laboratory
MSDH Lab
0.0096 mg/l , sample collected Jul 17, 2024 07:00, sampling point LC0018 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 07:00, sampling point LC0018 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024

Routine (10).