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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 491–500 of 830 samples, newest first — collected April 2, 2008 to April 29, 2008. The summary above covers all 830.

90 results from the 10 samples listed here: 9 detected, 81 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 491 to 500 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
Apr 29, 2008
Sampling point
TF082 Treatment Plant T082
Sample type
Routine
Lab sample
080430-009VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 29, 2008, sampling point TF082 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 29, 2008, sampling point TF082 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 29, 2008, sampling point TF082 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 29, 2008, sampling point TF082 Dichloromethane 2964 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 29, 2008, sampling point TF082 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 29, 2008, sampling point TF082 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 29, 2008, sampling point TF082 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 29, 2008, sampling point TF082 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 29, 2008, sampling point TF082 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 29, 2008, sampling point TF082 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 29, 2008, sampling point TF082 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 29, 2008, sampling point TF082 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 29, 2008, sampling point TF082 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 29, 2008, sampling point TF082 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 29, 2008, sampling point TF082 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 29, 2008, sampling point TF082 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 29, 2008, sampling point TF082 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 29, 2008, sampling point TF082 Benzene 2990 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 29, 2008, sampling point TF082 Toluene 2991 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 29, 2008, sampling point TF082 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 29, 2008, sampling point TF082 Styrene 2996 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Collected
Apr 21, 2008
Sampling point
TF081 Treatment Plant T081
Sample type
Routine
Lab sample
080422-022VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF081 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF081 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF081 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF081 Dichloromethane 2964 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF081 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF081 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF081 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF081 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF081 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF081 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF081 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF081 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF081 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF081 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF081 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF081 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF081 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF081 Benzene 2990 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF081 Toluene 2991 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF081 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF081 Styrene 2996 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Collected
Apr 21, 2008
Sampling point
TF084 Treatment Plant T084
Sample type
Routine
Lab sample
080422-039VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF084 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF084 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF084 Xylenes, Total 2955 EPA method 524.2 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF084 Dichloromethane 2964 EPA method 524.2 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF084 O-Dichlorobenzene 2968 EPA method 524.2 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF084 P-Dichlorobenzene 2969 EPA method 524.2 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF084 Vinyl Chloride 2976 EPA method 524.2 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF084 1,1-Dichloroethylene 2977 EPA method 524.2 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF084 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF084 1,2-Dichloroethane 2980 EPA method 524.2 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF084 1,1,1-Trichloroethane 2981 EPA method 524.2 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF084 Carbon Tetrachloride 2982 EPA method 524.2 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF084 1,2-Dichloropropane 2983 EPA method 524.2 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF084 Trichloroethylene 2984 EPA method 524.2 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF084 1,1,2-Trichloroethane 2985 EPA method 524.2 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF084 Tetrachloroethylene 2987 EPA method 524.2 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF084 Chlorobenzene 2989 EPA method 524.2 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF084 Benzene 2990 EPA method 524.2 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF084 Toluene 2991 EPA method 524.2 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF084 Ethylbenzene 2992 EPA method 524.2 Not recorded
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 21, 2008, sampling point TF084 Styrene 2996 EPA method 524.2 Not recorded
Collected
Apr 21, 2008
Sampling point
TF082 Treatment Plant T082
Sample type
Routine
Lab sample
080422-001IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 21, 2008, sampling point TF082 Arsenic 1005 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.015662 mg/l , sample collected Apr 21, 2008, sampling point TF082 Barium 1010 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.000124 mg/l , sample collected Apr 21, 2008, sampling point TF082 Cadmium 1015 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.000511 mg/l , sample collected Apr 21, 2008, sampling point TF082 Chromium 1020 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 21, 2008, sampling point TF082 Fluoride 1025 EPA method 380-75WE Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0002 mg/l Minimum Reporting Level , sample collected Apr 21, 2008, sampling point TF082 Mercury 1035 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.010083 mg/l , sample collected Apr 21, 2008, sampling point TF082 Nickel 1036 EPA method 200.8 Not recorded
0.000712 mg/l , sample collected Apr 21, 2008, sampling point TF082 Selenium 1045 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 21, 2008, sampling point TF082 Antimony, Total 1074 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Apr 21, 2008, sampling point TF082 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 21, 2008, sampling point TF082 Thallium, Total 1085 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
Apr 2, 2008
Sampling point
TF083
Sample type
Routine
Lab sample
080403-067CN
Laboratory
MSDH Lab
Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Apr 2, 2008, sampling point TF083 Cyanide 1024 EPA method QC10204001X Jan 1, 2008 – Dec 31, 2010
Collected
Apr 2, 2008
Sampling point
TF081 Treatment Plant T081
Sample type
Routine
Lab sample
080403-056CN
Laboratory
MSDH Lab
Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Apr 2, 2008, sampling point TF081 Cyanide 1024 EPA method QC10204001X Jan 1, 2008 – Dec 31, 2010
Collected
Apr 2, 2008
Sampling point
TF082 Treatment Plant T082
Sample type
Routine
Lab sample
080403-053CN
Laboratory
MSDH Lab
Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Apr 2, 2008, sampling point TF082 Cyanide 1024 EPA method QC10204001X Jan 1, 2008 – Dec 31, 2010
Collected
Apr 2, 2008
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
080403-052CN
Laboratory
MSDH Lab
Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Apr 2, 2008, sampling point TF080 Cyanide 1024 EPA method QC10204001X Jan 1, 2008 – Dec 31, 2010
Collected
Apr 2, 2008
Sampling point
TF084 Treatment Plant T084
Sample type
Routine
Lab sample
080403-012CN
Laboratory
MSDH Lab
Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Apr 2, 2008, sampling point TF084 Cyanide 1024 EPA method QC10204001X Not recorded
Collected
Apr 2, 2008
Sampling point
TF084 Treatment Plant T084
Sample type
Routine
Lab sample
080403-060IN
Laboratory
MSDH Lab
0.000251 mg/l , sample collected Apr 2, 2008, sampling point TF084 Arsenic 1005 EPA method 200.8 Not recorded
0.045652 mg/l , sample collected Apr 2, 2008, sampling point TF084 Barium 1010 EPA method 200.8 Not recorded
Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Apr 2, 2008, sampling point TF084 Cadmium 1015 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 2, 2008, sampling point TF084 Chromium 1020 EPA method 200.8 Not recorded
0.109 mg/l , sample collected Apr 2, 2008, sampling point TF084 Fluoride 1025 EPA method 380-75WE Not recorded
Not detected below 0.0002 mg/l Minimum Reporting Level , sample collected Apr 2, 2008, sampling point TF084 Mercury 1035 EPA method 200.8 Not recorded
0.000966 mg/l , sample collected Apr 2, 2008, sampling point TF084 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 2, 2008, sampling point TF084 Selenium 1045 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 2, 2008, sampling point TF084 Antimony, Total 1074 EPA method 200.8 Not recorded
Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Apr 2, 2008, sampling point TF084 Beryllium, Total 1075 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 2, 2008, sampling point TF084 Thallium, Total 1085 EPA method 200.8 Not recorded

Routine (10).