Skip to main content
Alpha

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

MS0170025 , City of Horn Lake - Twin Lakes

22 of the 55 analytes this system has been tested for have been detected at least once, across 221 samples on record.

The other 33 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 221 samples on record, detections range from August 11, 1993 to September 29, 2025. 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 - Twin Lakes, 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 135 of 141 results Aug 11, 1993 Sep 12, 2025
Lead 1030 Inorganic Chemical 81 of 141 results Aug 11, 1993 Aug 26, 2025
TTHM 2950 Organic Chemical 19 of 20 results Jul 10, 2007 Sep 29, 2025
Bromodichloromethane 2943 Organic Chemical 14 of 15 results Jul 10, 2007 Sep 29, 2025
Dibromochloromethane 2944 Organic Chemical 14 of 15 results Jul 10, 2007 Sep 29, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 12 of 22 results Jul 10, 2007 Sep 29, 2025
Chloroform 2941 Organic Chemical 12 of 15 results Jul 10, 2007 Sep 29, 2025
Bromoform 2942 Organic Chemical 12 of 15 results Jul 10, 2007 Sep 29, 2025
Barium 1010 Inorganic Chemical 11 of 11 results Oct 8, 2019 Feb 7, 2024
Nickel 1036 Inorganic Chemical 11 of 11 results Oct 8, 2019 Feb 7, 2024
Fluoride 1025 Inorganic Chemical 9 of 11 results Dec 3, 2019 Feb 7, 2024
Dibromoacetic Acid 2454 Organic Chemical 7 of 16 results Jul 18, 2019 Sep 29, 2025
Dichloroacetic Acid 2451 Organic Chemical 6 of 16 results Jul 18, 2019 Sep 29, 2025
Chromium 1020 Inorganic Chemical 6 of 11 results Dec 3, 2019 Feb 7, 2024
Combined Radium (-226 & -228) 4010 Radionuclide 2 of 2 results Jan 27, 2020 Jun 16, 2020
Radium-228 4030 Radionuclide 2 of 2 results Jan 27, 2020 Jun 16, 2020
Monochloroacetic Acid 2450 Organic Chemical 1 of 16 results Jan 27, 2025 Jan 27, 2025
Nitrite 1041 Inorganic Chemical 1 of 9 results Jan 10, 2022 Jan 10, 2022
Monobromoacetic Acid 2453 Organic Chemical 1 of 16 results Aug 24, 2020 Aug 24, 2020
Radium-226 4020 Radionuclide 1 of 2 results Jun 16, 2020 Jun 16, 2020
Gross Alpha, Incl. Radon & U 4002 Radionuclide 1 of 1 result Jan 27, 2020 Jan 27, 2020
Sodium 1052 Inorganic Chemical 1 of 1 result Sep 17, 2019 Sep 17, 2019

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 101–110 of 221 samples, newest first — collected January 21, 2020 to August 24, 2020. The summary above covers all 221.

75 results from the 10 samples listed here: 26 detected, 49 not detected. Across the whole record it is 359 of 823. 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 - Twin Lakes, every result from 101 to 110 of 221 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 24, 2020 13:15
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
200825-011HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Aug 24, 2020 13:15, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.002 mg/l , sample collected Aug 24, 2020 13:15, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 24, 2020 13:15, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
0.006 mg/l , sample collected Aug 24, 2020 13:15, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 24, 2020 13:15, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.008 mg/l , sample collected Aug 24, 2020 13:15, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Not recorded
Collected
Aug 24, 2020 13:15
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
200825-011TH
Laboratory
MSDH Lab
2.64 ug/l , sample collected Aug 24, 2020 13:15, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
2.53 ug/l , sample collected Aug 24, 2020 13:15, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
2.65 ug/l , sample collected Aug 24, 2020 13:15, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
3.46 ug/l , sample collected Aug 24, 2020 13:15, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
11.28 ug/l , sample collected Aug 24, 2020 13:15, sampling point MRT000 TTHM 2950 Not recorded
Collected
Jun 16, 2020 13:17
Sampling point
TF080 Treatment Plant TF080
Sample type
Routine
Lab sample
4652983
Laboratory
Eurofins Eaton Analytical South Bend in
1.71 pci/l , sample collected Jun 16, 2020 13:17, sampling point TF080 Combined Radium (-226 & -228) 4010 EPA method 7500-RA Not recorded
0.41 pci/l , sample collected Jun 16, 2020 13:17, sampling point TF080 Radium-226 4020 EPA method 7500-RAB Apr 1, 2020 – Jun 30, 2020
1.3 pci/l , sample collected Jun 16, 2020 13:17, sampling point TF080 Radium-228 4030 EPA method 7500-RAD Apr 1, 2020 – Jun 30, 2020
Collected
Apr 20, 2020 08:13
Sampling point
TF080 Treatment Plant TF080
Sample type
Routine
Lab sample
200421-040IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 20, 2020 08:13, sampling point TF080 Arsenic 1005 EPA method 200.8 Apr 1, 2020 – Jun 30, 2020
0.0515 mg/l , sample collected Apr 20, 2020 08:13, sampling point TF080 Barium 1010 EPA method 200.8 Apr 1, 2020 – Jun 30, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 20, 2020 08:13, sampling point TF080 Cadmium 1015 EPA method 200.8 Apr 1, 2020 – Jun 30, 2020
0.0017 mg/l , sample collected Apr 20, 2020 08:13, sampling point TF080 Chromium 1020 EPA method 200.8 Apr 1, 2020 – Jun 30, 2020
1.03 mg/l , sample collected Apr 20, 2020 08:13, sampling point TF080 Fluoride 1025 EPA method QC 10-109-12-2-A Apr 1, 2020 – Jun 30, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 20, 2020 08:13, sampling point TF080 Mercury 1035 EPA method 200.8 Apr 1, 2020 – Jun 30, 2020
0.0009 mg/l , sample collected Apr 20, 2020 08:13, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 20, 2020 08:13, sampling point TF080 Selenium 1045 EPA method 200.8 Apr 1, 2020 – Jun 30, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 20, 2020 08:13, sampling point TF080 Antimony, Total 1074 EPA method 200.8 Apr 1, 2020 – Jun 30, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 20, 2020 08:13, sampling point TF080 Beryllium, Total 1075 EPA method 200.8 Apr 1, 2020 – Jun 30, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 20, 2020 08:13, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Apr 1, 2020 – Jun 30, 2020
Collected
Apr 20, 2020 08:13
Sampling point
TF080 Treatment Plant TF080
Sample type
Routine
Lab sample
200421-036IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 20, 2020 08:13, sampling point TF080 Arsenic 1005 EPA method 200.8 Apr 1, 2020 – Jun 30, 2020
0.0524 mg/l , sample collected Apr 20, 2020 08:13, sampling point TF080 Barium 1010 EPA method 200.8 Apr 1, 2020 – Jun 30, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 20, 2020 08:13, sampling point TF080 Cadmium 1015 EPA method 200.8 Apr 1, 2020 – Jun 30, 2020
0.0018 mg/l , sample collected Apr 20, 2020 08:13, sampling point TF080 Chromium 1020 EPA method 200.8 Apr 1, 2020 – Jun 30, 2020
1.03 mg/l , sample collected Apr 20, 2020 08:13, sampling point TF080 Fluoride 1025 EPA method QC 10-109-12-2-A Apr 1, 2020 – Jun 30, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 20, 2020 08:13, sampling point TF080 Mercury 1035 EPA method 200.8 Apr 1, 2020 – Jun 30, 2020
0.0009 mg/l , sample collected Apr 20, 2020 08:13, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 20, 2020 08:13, sampling point TF080 Selenium 1045 EPA method 200.8 Apr 1, 2020 – Jun 30, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 20, 2020 08:13, sampling point TF080 Antimony, Total 1074 EPA method 200.8 Apr 1, 2020 – Jun 30, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 20, 2020 08:13, sampling point TF080 Beryllium, Total 1075 EPA method 200.8 Apr 1, 2020 – Jun 30, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 20, 2020 08:13, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Apr 1, 2020 – Jun 30, 2020
Collected
Mar 2, 2020 13:33
Sampling point
TF080 Treatment Plant TF080
Sample type
Routine
Lab sample
200303-006IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 2, 2020 13:33, sampling point TF080 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Mar 31, 2020
0.0496 mg/l , sample collected Mar 2, 2020 13:33, sampling point TF080 Barium 1010 EPA method 200.8 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 2, 2020 13:33, sampling point TF080 Cadmium 1015 EPA method 200.8 Jan 1, 2020 – Mar 31, 2020
0.0017 mg/l , sample collected Mar 2, 2020 13:33, sampling point TF080 Chromium 1020 EPA method 200.8 Jan 1, 2020 – Mar 31, 2020
1.02 mg/l , sample collected Mar 2, 2020 13:33, sampling point TF080 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2020 – Mar 31, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 2, 2020 13:33, sampling point TF080 Mercury 1035 EPA method 200.8 Jan 1, 2020 – Mar 31, 2020
0.001 mg/l , sample collected Mar 2, 2020 13:33, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 2, 2020 13:33, sampling point TF080 Selenium 1045 EPA method 200.8 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 2, 2020 13:33, sampling point TF080 Antimony, Total 1074 EPA method 200.8 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 2, 2020 13:33, sampling point TF080 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 2, 2020 13:33, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Jan 1, 2020 – Mar 31, 2020
Collected
Mar 2, 2020 13:35
Sampling point
TF080 Treatment Plant TF080
Sample type
Routine
Lab sample
200303-002VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 2, 2020 13:35, sampling point TF080 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 2, 2020 13:35, sampling point TF080 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 2, 2020 13:35, sampling point TF080 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 2, 2020 13:35, sampling point TF080 Dichloromethane 2964 EPA method 524.2 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 2, 2020 13:35, sampling point TF080 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 2, 2020 13:35, sampling point TF080 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 2, 2020 13:35, sampling point TF080 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 2, 2020 13:35, sampling point TF080 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 2, 2020 13:35, sampling point TF080 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 2, 2020 13:35, sampling point TF080 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 2, 2020 13:35, sampling point TF080 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 2, 2020 13:35, sampling point TF080 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 2, 2020 13:35, sampling point TF080 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 2, 2020 13:35, sampling point TF080 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 2, 2020 13:35, sampling point TF080 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 2, 2020 13:35, sampling point TF080 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 2, 2020 13:35, sampling point TF080 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 2, 2020 13:35, sampling point TF080 Benzene 2990 EPA method 524.2 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 2, 2020 13:35, sampling point TF080 Toluene 2991 EPA method 524.2 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 2, 2020 13:35, sampling point TF080 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2020 – Mar 31, 2020
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 2, 2020 13:35, sampling point TF080 Styrene 2996 EPA method 524.2 Jan 1, 2020 – Mar 31, 2020
Collected
Jan 27, 2020 08:10
Sampling point
TF080 Treatment Plant TF080
Sample type
Routine
Lab sample
4551952
Laboratory
Eurofins Eaton Analytical South Bend in
3.1 pci/l , sample collected Jan 27, 2020 08:10, sampling point TF080 Combined Radium (-226 & -228) 4010 EPA method 7500-RA Not recorded
Not detected below 0.3 pci/l Minimum Reporting Level , sample collected Jan 27, 2020 08:10, sampling point TF080 Radium-226 4020 EPA method 7500-RAB Jan 1, 2020 – Mar 31, 2020
3.1 pci/l , sample collected Jan 27, 2020 08:10, sampling point TF080 Radium-228 4030 EPA method 7500-RAD Jan 1, 2020 – Mar 31, 2020
Collected
Jan 27, 2020 08:10
Sampling point
TF080 Treatment Plant TF080
Sample type
Routine
Lab sample
4551951
Laboratory
Eurofins Eaton Analytical South Bend in
3.1 pci/l , sample collected Jan 27, 2020 08:10, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 7110B Not recorded
Collected
Jan 21, 2020 13:13
Sampling point
TF080 Treatment Plant TF080
Sample type
Routine
Lab sample
200122-002NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 21, 2020 13:13, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2020 – Mar 31, 2020
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 21, 2020 13:13, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2020 – Mar 31, 2020
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 21, 2020 13:13, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2020 – Mar 31, 2020

Routine (10).