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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 131–140 of 172 samples, newest first — collected December 1, 2008 to September 14, 2009. The summary above covers all 172.

50 results from the 10 samples listed here: 26 detected, 24 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.

Chemical and radiological sample results for Central Yazoo #4-Benton, every result from 131 to 140 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
Sep 14, 2009
Sampling point
SM2 SM2
Sample type
Routine
Lab sample
090915-016TH
Laboratory
MSDH Lab
51.1 ug/l , sample collected Sep 14, 2009, sampling point SM2 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 14, 2009, sampling point SM2 Bromoform 2942 EPA method 524.2 Not recorded
7.16 ug/l , sample collected Sep 14, 2009, sampling point SM2 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 14, 2009, sampling point SM2 Dibromochloromethane 2944 EPA method 524.2 Not recorded
58.26 ug/l , sample collected Sep 14, 2009, sampling point SM2 TTHM 2950 EPA method 524.2 Not recorded
Collected
Sep 14, 2009
Sampling point
SM1 SM1
Sample type
Routine
Lab sample
090915-015TH
Laboratory
MSDH Lab
52.3 ug/l , sample collected Sep 14, 2009, sampling point SM1 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 14, 2009, sampling point SM1 Bromoform 2942 EPA method 524.2 Not recorded
7.13 ug/l , sample collected Sep 14, 2009, sampling point SM1 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 14, 2009, sampling point SM1 Dibromochloromethane 2944 EPA method 524.2 Not recorded
59.43 ug/l , sample collected Sep 14, 2009, sampling point SM1 TTHM 2950 EPA method 524.2 Not recorded
Collected
Sep 14, 2009
Sampling point
SM2 SM2
Sample type
Routine
Lab sample
090915-056HA
Laboratory
MSDH Lab
0.002 mg/l , sample collected Sep 14, 2009, sampling point SM2 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.023 mg/l , sample collected Sep 14, 2009, sampling point SM2 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.023 mg/l , sample collected Sep 14, 2009, sampling point SM2 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 14, 2009, sampling point SM2 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 14, 2009, sampling point SM2 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.04 mg/l , sample collected Sep 14, 2009, sampling point SM2 Total Haloacetic Acids (Haa5) 2456 Not recorded
Collected
Sep 14, 2009
Sampling point
SM1 SM1
Sample type
Routine
Lab sample
090915-055HA
Laboratory
MSDH Lab
0.003 mg/l , sample collected Sep 14, 2009, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.029 mg/l , sample collected Sep 14, 2009, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.029 mg/l , sample collected Sep 14, 2009, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 14, 2009, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 14, 2009, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.06 mg/l , sample collected Sep 14, 2009, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 Not recorded
Collected
Jun 15, 2009
Sampling point
SM2 SM2
Sample type
Routine
Lab sample
090616-040TH
Laboratory
MSDH Lab
55 ug/l , sample collected Jun 15, 2009, sampling point SM2 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 15, 2009, sampling point SM2 Bromoform 2942 EPA method 524.2 Not recorded
5.85 ug/l , sample collected Jun 15, 2009, sampling point SM2 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 15, 2009, sampling point SM2 Dibromochloromethane 2944 EPA method 524.2 Not recorded
60.85 ug/l , sample collected Jun 15, 2009, sampling point SM2 TTHM 2950 EPA method 524.2 Not recorded
Collected
Jun 15, 2009
Sampling point
SM1 SM1
Sample type
Routine
Lab sample
090616-039TH
Laboratory
MSDH Lab
72.2 ug/l , sample collected Jun 15, 2009, sampling point SM1 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 15, 2009, sampling point SM1 Bromoform 2942 EPA method 524.2 Not recorded
7.41 ug/l , sample collected Jun 15, 2009, sampling point SM1 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 15, 2009, sampling point SM1 Dibromochloromethane 2944 EPA method 524.2 Not recorded
79.61 ug/l , sample collected Jun 15, 2009, sampling point SM1 TTHM 2950 EPA method 524.2 Not recorded
Collected
Jun 15, 2009
Sampling point
SM2 SM2
Sample type
Routine
Lab sample
090616-038HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Jun 15, 2009, sampling point SM2 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.018 mg/l , sample collected Jun 15, 2009, sampling point SM2 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.016 mg/l , sample collected Jun 15, 2009, sampling point SM2 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 15, 2009, sampling point SM2 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 15, 2009, sampling point SM2 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.03 mg/l , sample collected Jun 15, 2009, sampling point SM2 Total Haloacetic Acids (Haa5) 2456 Not recorded
Collected
Jun 15, 2009
Sampling point
SM1 SM1
Sample type
Routine
Lab sample
090616-037HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Jun 15, 2009, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.015 mg/l , sample collected Jun 15, 2009, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.017 mg/l , sample collected Jun 15, 2009, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 15, 2009, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 15, 2009, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.03 mg/l , sample collected Jun 15, 2009, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 Not recorded
Collected
Jun 10, 2009
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
090611-049NI
Laboratory
MSDH Lab
Not detected below 0.25 mg/l Minimum Reporting Level , sample collected Jun 10, 2009, sampling point TF101 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2009 – Dec 31, 2009
Not detected below 0.2 mg/l Minimum Reporting Level , sample collected Jun 10, 2009, sampling point TF101 Nitrate 1040 EPA method 353.2 Jan 1, 2009 – Dec 31, 2009
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jun 10, 2009, sampling point TF101 Nitrite 1041 EPA method 353.2 Jan 1, 2009 – Dec 31, 2009
Collected
Dec 1, 2008
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
081202-017NI
Laboratory
MSDH Lab
Not detected below 0.25 mg/l Minimum Reporting Level , sample collected Dec 1, 2008, sampling point TF101 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.2 mg/l Minimum Reporting Level , sample collected Dec 1, 2008, sampling point TF101 Nitrate 1040 EPA method 353.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Dec 1, 2008, sampling point TF101 Nitrite 1041 EPA method 353.2 Jan 1, 2008 – Dec 31, 2008

Routine (10).