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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 411–420 of 830 samples, newest first — collected October 4, 2010 to January 26, 2011. The summary above covers all 830.

74 results from the 10 samples listed here: 2 detected, 72 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.

Chemical and radiological sample results for City of Horn Lake, every result from 411 to 420 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
Jan 26, 2011
Sampling point
TF081 Treatment Plant T081
Sample type
Routine
Lab sample
110127-053NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 26, 2011, sampling point TF081 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 26, 2011, sampling point TF081 Nitrate 1040 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 26, 2011, sampling point TF081 Nitrite 1041 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Collected
Jan 26, 2011
Sampling point
TF084 Treatment Plant T084
Sample type
Routine
Lab sample
110127-041NI
Laboratory
MSDH Lab
0.37 mg/l , sample collected Jan 26, 2011, sampling point TF084 Nitrate-Nitrite 1038 EPA method 353.2 Not recorded
0.37 mg/l , sample collected Jan 26, 2011, sampling point TF084 Nitrate 1040 EPA method 353.2 Not recorded
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 26, 2011, sampling point TF084 Nitrite 1041 EPA method 353.2 Not recorded
Collected
Jan 26, 2011
Sampling point
TF083
Sample type
Routine
Lab sample
110127-012VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 26, 2011, sampling point TF083 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 26, 2011, sampling point TF083 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 26, 2011, sampling point TF083 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 26, 2011, sampling point TF083 Dichloromethane 2964 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 26, 2011, sampling point TF083 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 26, 2011, sampling point TF083 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 26, 2011, sampling point TF083 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 26, 2011, sampling point TF083 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 26, 2011, sampling point TF083 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 26, 2011, sampling point TF083 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 26, 2011, sampling point TF083 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 26, 2011, sampling point TF083 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 26, 2011, sampling point TF083 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 26, 2011, sampling point TF083 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 26, 2011, sampling point TF083 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 26, 2011, sampling point TF083 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 26, 2011, sampling point TF083 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 26, 2011, sampling point TF083 Benzene 2990 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 26, 2011, sampling point TF083 Toluene 2991 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 26, 2011, sampling point TF083 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 26, 2011, sampling point TF083 Styrene 2996 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Collected
Nov 8, 2010
Sampling point
TF084 Treatment Plant T084
Sample type
Routine
Lab sample
101109-009SA
Laboratory
MSDH Lab
Not detected below 0.025 ug/l Minimum Reporting Level , sample collected Nov 8, 2010, sampling point TF084 Benzo(a)pyrene 2306 EPA method 550.1 Not recorded
Collected
Nov 1, 2010
Sampling point
TF084 Treatment Plant T084
Sample type
Routine
Lab sample
101102-010S5
Laboratory
MSDH Lab
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Nov 1, 2010, sampling point TF084 Endrin 2005 EPA method 505 Not recorded
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Nov 1, 2010, sampling point TF084 BHC-Gamma 2010 EPA method 505 Not recorded
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Nov 1, 2010, sampling point TF084 Methoxychlor 2015 EPA method 505 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 1, 2010, sampling point TF084 Toxaphene 2020 EPA method 505 Not recorded
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Nov 1, 2010, sampling point TF084 Hexachlorocyclopentadiene 2042 EPA method 505 Not recorded
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Nov 1, 2010, sampling point TF084 Heptachlor 2065 EPA method 505 Not recorded
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Nov 1, 2010, sampling point TF084 Heptachlor Epoxide 2067 EPA method 505 Not recorded
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Nov 1, 2010, sampling point TF084 Hexachlorobenzene 2274 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Nov 1, 2010, sampling point TF084 Aroclor 1016 2388 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Nov 1, 2010, sampling point TF084 Aroclor 1221 2390 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Nov 1, 2010, sampling point TF084 Aroclor 1232 2392 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Nov 1, 2010, sampling point TF084 Aroclor 1242 2394 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Nov 1, 2010, sampling point TF084 Aroclor 1248 2396 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Nov 1, 2010, sampling point TF084 Aroclor 1254 2398 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Nov 1, 2010, sampling point TF084 Aroclor 1260 2400 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Nov 1, 2010, sampling point TF084 Chlordane 2959 EPA method 505 Not recorded
Collected
Nov 1, 2010
Sampling point
TF084 Treatment Plant T084
Sample type
Routine
Lab sample
101102-015S1
Laboratory
MSDH Lab
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Nov 1, 2010, sampling point TF084 1,2-Dibromo-3-Chloropropane 2931 EPA method 504.1 Not recorded
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Nov 1, 2010, sampling point TF084 Ethylene Dibromide 2946 EPA method 504.1 Not recorded
Collected
Oct 26, 2010
Sampling point
TF084 Treatment Plant T084
Sample type
Routine
Lab sample
101027-001S9
Laboratory
MSDH Lab
Not detected below 0.8 ug/l Minimum Reporting Level , sample collected Oct 26, 2010, sampling point TF084 Diquat 2032 EPA method 549.2 Not recorded
Collected
Oct 20, 2010
Sampling point
TF083
Sample type
Routine
Lab sample
101021-015VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 20, 2010, sampling point TF083 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 20, 2010, sampling point TF083 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 20, 2010, sampling point TF083 Xylenes, Total 2955 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 20, 2010, sampling point TF083 Dichloromethane 2964 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 20, 2010, sampling point TF083 O-Dichlorobenzene 2968 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 20, 2010, sampling point TF083 P-Dichlorobenzene 2969 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 20, 2010, sampling point TF083 Vinyl Chloride 2976 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 20, 2010, sampling point TF083 1,1-Dichloroethylene 2977 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 20, 2010, sampling point TF083 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 20, 2010, sampling point TF083 1,2-Dichloroethane 2980 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 20, 2010, sampling point TF083 1,1,1-Trichloroethane 2981 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 20, 2010, sampling point TF083 Carbon Tetrachloride 2982 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 20, 2010, sampling point TF083 1,2-Dichloropropane 2983 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 20, 2010, sampling point TF083 Trichloroethylene 2984 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 20, 2010, sampling point TF083 1,1,2-Trichloroethane 2985 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 20, 2010, sampling point TF083 Tetrachloroethylene 2987 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 20, 2010, sampling point TF083 Chlorobenzene 2989 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 20, 2010, sampling point TF083 Benzene 2990 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 20, 2010, sampling point TF083 Toluene 2991 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 20, 2010, sampling point TF083 Ethylbenzene 2992 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 20, 2010, sampling point TF083 Styrene 2996 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Collected
Oct 4, 2010
Sampling point
TF084 Treatment Plant T084
Sample type
Routine
Lab sample
101005-009SC
Laboratory
MSDH Lab
Not detected below 12.5 ug/l Minimum Reporting Level , sample collected Oct 4, 2010, sampling point TF084 Glyphosate 2034 EPA method 547 Not recorded
Collected
Oct 4, 2010
Sampling point
TF084 Treatment Plant T084
Sample type
Routine
Lab sample
101005-007S7
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 4, 2010, sampling point TF084 Oxamyl 2036 EPA method 531.1 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 4, 2010, sampling point TF084 Aldicarb Sulfoxide 2043 EPA method 531.1 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 4, 2010, sampling point TF084 Aldicarb Sulfone 2044 EPA method 531.1 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 4, 2010, sampling point TF084 Carbofuran 2046 EPA method 531.1 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 4, 2010, sampling point TF084 Aldicarb 2047 EPA method 531.1 Not recorded

Routine (10).