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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 311–320 of 426 samples, newest first — collected February 28, 2005 to August 21, 2007. The summary above covers all 426.

42 results from the 10 samples listed here: 19 detected, 23 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.

Chemical and radiological sample results for Horn Lake Water Association, every result from 311 to 320 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
Aug 21, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070822-163PB
Laboratory
MSDH Lab
0.1031 mg/l , sample collected Aug 21, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 21, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Collected
Jul 10, 2007
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
070711-016HA
Laboratory
MSDH Lab
0.001 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Jul 10, 2007, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2005 – Dec 31, 2007
Collected
Jul 10, 2007
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
070711-015TH
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 10, 2007, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 10, 2007, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 10, 2007, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 10, 2007, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
0 This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded a value but no unit of measure for it. The unit is NOT inferable from the analyte: many analytes are reported in more than one unit — TTHM and HAA5 in both MG/L and UG/L — so there is no per-analyte default to fall back on. The number is published as it stands and must not be compared to a limit. The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Jul 10, 2007, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2005 – Dec 31, 2007
Collected
Apr 16, 2007
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
070417-043NI
Laboratory
MSDH Lab
0.32 mg/l , sample collected Apr 16, 2007, sampling point TF080 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2007 – Dec 31, 2007
0.31 mg/l , sample collected Apr 16, 2007, sampling point TF080 Nitrate 1040 EPA method 353.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 16, 2007, sampling point TF080 Nitrite 1041 EPA method 353.2 Jan 1, 2007 – Dec 31, 2007
Collected
Jun 14, 2006
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
060615-008NI
Laboratory
MSDH Lab
0.27 mg/l , sample collected Jun 14, 2006, sampling point TF080 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2006 – Dec 31, 2006
0.23 mg/l , sample collected Jun 14, 2006, sampling point TF080 Nitrate 1040 EPA method 353.2 Jan 1, 2006 – Dec 31, 2006
0.03 mg/l , sample collected Jun 14, 2006, sampling point TF080 Nitrite 1041 EPA method 353.2 Jan 1, 2006 – Dec 31, 2006
Collected
Jan 23, 2006
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
060124-044CN
Laboratory
MSDH Lab
Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Jan 23, 2006, sampling point TF080 Cyanide 1024 EPA method QC10204001X Jan 1, 2005 – Dec 31, 2007
Collected
Jan 23, 2006
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
060124-076IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 23, 2006, sampling point TF080 Arsenic 1005 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.021192 mg/l , sample collected Jan 23, 2006, sampling point TF080 Barium 1010 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.00028 mg/l , sample collected Jan 23, 2006, sampling point TF080 Cadmium 1015 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.000963 mg/l , sample collected Jan 23, 2006, sampling point TF080 Chromium 1020 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
1.020406 mg/l , sample collected Jan 23, 2006, sampling point TF080 Fluoride 1025 EPA method 380-75WE Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0002 mg/l Minimum Reporting Level , sample collected Jan 23, 2006, sampling point TF080 Mercury 1035 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.000554 mg/l , sample collected Jan 23, 2006, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
0.001354 mg/l , sample collected Jan 23, 2006, sampling point TF080 Selenium 1045 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 23, 2006, sampling point TF080 Antimony, Total 1074 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Jan 23, 2006, sampling point TF080 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 23, 2006, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 23, 2006, sampling point TF080 Uranium-238 4009 Not recorded
Collected
Jul 25, 2005
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
050726-126NI
Laboratory
MSDH Lab
0.29 mg/l , sample collected Jul 25, 2005, sampling point TF080 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2005 – Dec 31, 2005
0.29 mg/l , sample collected Jul 25, 2005, sampling point TF080 Nitrate 1040 EPA method 353.2 Jan 1, 2005 – Dec 31, 2005
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jul 25, 2005, sampling point TF080 Nitrite 1041 EPA method 353.2 Jan 1, 2005 – Dec 31, 2005
Collected
Feb 28, 2005
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
050301-088CN
Laboratory
MSDH Lab
Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Feb 28, 2005, sampling point TF080 Cyanide 1024 EPA method QC10204001X Jan 1, 2005 – Dec 31, 2007
Collected
Feb 28, 2005
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
050301-090IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 28, 2005, sampling point TF080 Arsenic 1005 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.021801 mg/l , sample collected Feb 28, 2005, sampling point TF080 Barium 1010 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Feb 28, 2005, sampling point TF080 Cadmium 1015 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 28, 2005, sampling point TF080 Chromium 1020 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.378731 mg/l , sample collected Feb 28, 2005, sampling point TF080 Fluoride 1025 EPA method 380-75WE Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0002 mg/l Minimum Reporting Level , sample collected Feb 28, 2005, sampling point TF080 Mercury 1035 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.000541 mg/l , sample collected Feb 28, 2005, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 28, 2005, sampling point TF080 Selenium 1045 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 28, 2005, sampling point TF080 Antimony, Total 1074 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Feb 28, 2005, sampling point TF080 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 28, 2005, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007

Routine (10).