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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

MS0820031 , Central Yazoo #4-Benton

23 of the 62 analytes this system has been tested for have been detected at least once, across 172 samples on record.

The other 39 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 172 samples on record, detections range from November 5, 2003 to February 9, 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 Central Yazoo #4-Benton, 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 63 of 63 results Aug 21, 2007 Aug 22, 2023
Lead 1030 Inorganic Chemical 40 of 63 results Aug 21, 2007 Aug 22, 2023
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 29 of 29 results Sep 22, 2004 Feb 9, 2026
TTHM 2950 Organic Chemical 27 of 28 results Sep 22, 2004 Sep 16, 2025
Dichloroacetic Acid 2451 Organic Chemical 22 of 22 results Jun 15, 2009 Feb 9, 2026
Trichloroacetic Acid 2452 Organic Chemical 22 of 22 results Jun 15, 2009 Feb 9, 2026
Chloroform 2941 Organic Chemical 21 of 21 results Jun 15, 2009 Sep 16, 2025
Bromodichloromethane 2943 Organic Chemical 21 of 21 results Jun 15, 2009 Sep 16, 2025
Dibromochloromethane 2944 Organic Chemical 11 of 21 results Dec 14, 2009 Sep 16, 2025
Fluoride 1025 Inorganic Chemical 11 of 11 results Nov 5, 2003 Apr 7, 2025
Barium 1010 Inorganic Chemical 10 of 10 results Nov 5, 2003 Apr 7, 2025
Chromium 1020 Inorganic Chemical 7 of 10 results Apr 5, 2004 Apr 7, 2025
Monochloroacetic Acid 2450 Organic Chemical 7 of 22 results Sep 14, 2009 Aug 20, 2024
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 5 results Dec 15, 2011 Jul 17, 2012
Nickel 1036 Inorganic Chemical 3 of 10 results May 10, 2010 Apr 7, 2025
Sodium 1052 Inorganic Chemical 3 of 3 results Sep 18, 2019 Mar 20, 2023
Calcium 1016 Inorganic Chemical 1 of 1 result Aug 12, 2021 Aug 12, 2021
Chloride 1017 Inorganic Chemical 1 of 1 result Aug 12, 2021 Aug 12, 2021
Conductivity @ 25 C Umhos/CM 1064 Water Quality 1 of 1 result Aug 12, 2021 Aug 12, 2021
Color 1905 Water Quality 1 of 1 result Aug 12, 2021 Aug 12, 2021
Alkalinity, Total 1927 Water Quality 1 of 1 result Aug 12, 2021 Aug 12, 2021
Selenium 1045 Inorganic Chemical 1 of 10 results Apr 5, 2004 Apr 5, 2004
Sulfate 1055 Inorganic Chemical 1 of 3 results Nov 5, 2003 Nov 5, 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 31–40 of 172 samples, newest first — collected March 28, 2022 to August 22, 2023. The summary above covers all 172.

46 results from the 10 samples listed here: 8 detected, 38 not detected. Across the whole record it is 309 of 745. 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 2 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 Central Yazoo #4-Benton, every result from 31 to 40 of 172 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 22, 2023 07:15
Sampling point
LC0028 Location withheld
Sample type
Routine
Lab sample
PB-230823-134
Laboratory
MSDH Lab
0.142 mg/l , sample collected Aug 22, 2023 07:15, sampling point LC0028 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
0.7 ug/l , sample collected Aug 22, 2023 07:15, sampling point LC0028 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 22, 2023 04:30
Sampling point
LC0027 Location withheld
Sample type
Routine
Lab sample
PB-230823-132
Laboratory
MSDH Lab
0.674 mg/l , sample collected Aug 22, 2023 04:30, sampling point LC0027 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2023 04:30, sampling point LC0027 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Mar 20, 2023 20:23
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NA-230320-007
Laboratory
MSDH Lab
251 mg/l , sample collected Mar 20, 2023 20:23, sampling point TF101 Sodium 1052 EPA method 200.7 Not recorded
Collected
Mar 20, 2023 08:23
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-230320-003
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 20, 2023 08:23, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 20, 2023 08:23, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 20, 2023 08:23, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Collected
Dec 12, 2022 11:40
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
HA-221213-024
Laboratory
MSDH Lab
49.4 ug/l , sample collected Dec 12, 2022 11:40, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2022 – Dec 31, 2022
Collected
Dec 12, 2022 11:39
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-221213-024
Laboratory
MSDH Lab
74.4 ug/l , sample collected Dec 12, 2022 11:39, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Collected
Nov 28, 2022 11:22
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-221129-008
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 28, 2022 11:22, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0123 mg/l , sample collected Nov 28, 2022 11:22, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 28, 2022 11:22, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 28, 2022 11:22, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.602 mg/l , sample collected Nov 28, 2022 11:22, sampling point TF101 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 28, 2022 11:22, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 28, 2022 11:22, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Nov 28, 2022 11:22, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 28, 2022 11:22, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 28, 2022 11:22, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 28, 2022 11:22, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Oct 24, 2022 08:59
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
CN-221024-007
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Oct 24, 2022 08:59, sampling point TF101 Cyanide 1024 EPA method QC10204001X Jan 1, 2020 – Dec 31, 2022
Collected
Oct 24, 2022 08:41
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
VO-221025-011
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 08:41, sampling point TF101 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 08:41, sampling point TF101 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 08:41, sampling point TF101 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 08:41, sampling point TF101 Dichloromethane 2964 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 08:41, sampling point TF101 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 08:41, sampling point TF101 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 08:41, sampling point TF101 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 08:41, sampling point TF101 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 08:41, sampling point TF101 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 08:41, sampling point TF101 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 08:41, sampling point TF101 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 08:41, sampling point TF101 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 08:41, sampling point TF101 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 08:41, sampling point TF101 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 08:41, sampling point TF101 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 08:41, sampling point TF101 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 08:41, sampling point TF101 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 08:41, sampling point TF101 Benzene 2990 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 08:41, sampling point TF101 Toluene 2991 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 08:41, sampling point TF101 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 08:41, sampling point TF101 Styrene 2996 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Collected
Mar 28, 2022 08:22
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-220328-010
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 28, 2022 08:22, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2022 – Dec 31, 2022
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 28, 2022 08:22, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2022 – Dec 31, 2022
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 28, 2022 08:22, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2022 – Dec 31, 2022

Routine (10).