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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.

Analytes tested for

MS0570004 , City of McComb

City of McComb has been analysed for 67 analytes.

This is what has been looked for, not what has been found. Which of them have been detected, and when, is on the sample results page.

The agency also publishes one analyte list across every system it serves. That list carries no results and no counts, and it leaves out coliform and the other microbiological analytes — which this page does not.

65 of these are chemical, radiological or water-quality analytes, and their results are on the chemical and radiological samples page — which counts 65, not 67, for that reason. The other 2 — Coliform (TCR) and E. Coli — are organisms, and their records live with the coliform and microbial samples.

Every analyte City of McComb has been analysed for, with how many results are on record and when it was last collected. A result count is not a count of detections; which analytes have been detected is on the sample results page.
Analyte Kind Results on record Last collected
1,1,1-Trichloroethane 2981 Organic Chemical 7 Aug 1, 2022
1,1,2-Trichloroethane 2985 Organic Chemical 7 Aug 1, 2022
1,1-Dichloroethylene 2977 Organic Chemical 7 Aug 1, 2022
1,2,4-Trichlorobenzene 2378 Organic Chemical 7 Aug 1, 2022
1,2-Dichloroethane 2980 Organic Chemical 7 Aug 1, 2022
1,2-Dichloropropane 2983 Organic Chemical 7 Aug 1, 2022
Alkalinity, Total 1927 Water Quality 1 Oct 15, 2021
Antimony, Total 1074 Inorganic Chemical 10 Mar 19, 2025
Arsenic 1005 Inorganic Chemical 10 Mar 19, 2025
Asbestos 1094 Inorganic Chemical 1 Sep 17, 2019
Barium 1010 Inorganic Chemical 10 Mar 19, 2025
Benzene 2990 Organic Chemical 7 Aug 1, 2022
Beryllium, Total 1075 Inorganic Chemical 10 Mar 19, 2025
Bromodichloromethane 2943 Organic Chemical 35 Dec 22, 2025
Bromoform 2942 Organic Chemical 35 Dec 22, 2025
Cadmium 1015 Inorganic Chemical 10 Mar 19, 2025
Calcium 1016 Inorganic Chemical 1 Oct 15, 2021
Carbon Tetrachloride 2982 Organic Chemical 7 Aug 1, 2022
Chloride 1017 Inorganic Chemical 1 Oct 15, 2021
Chlorobenzene 2989 Organic Chemical 7 Aug 1, 2022
Chloroform 2941 Organic Chemical 35 Dec 22, 2025
Chromium 1020 Inorganic Chemical 10 Mar 19, 2025
Cis-1,2-Dichloroethylene 2380 Organic Chemical 7 Aug 1, 2022
Coliform (TCR) 3100 Organism 4,894 Jul 22, 2026
Color 1905 Water Quality 1 Oct 15, 2021
Combined Radium (-226 & -228) 4010 Radionuclide 3 Sep 17, 2019
Combined Uranium 4006 Radionuclide 3 Jun 11, 2018
Conductivity @ 25 C Umhos/CM 1064 Water Quality 1 Oct 15, 2021
Copper, Free 1022 Inorganic Chemical 242 Aug 19, 2025
Cyanide 1024 Inorganic Chemical 11 Sep 29, 2025
Dibromoacetic Acid 2454 Organic Chemical 30 Dec 22, 2025
Dibromochloromethane 2944 Organic Chemical 35 Dec 22, 2025
Dichloroacetic Acid 2451 Organic Chemical 30 Dec 22, 2025
Dichloromethane 2964 Organic Chemical 7 Aug 1, 2022
E. Coli 3014 Organism 1,204 Jul 22, 2026
Ethylbenzene 2992 Organic Chemical 7 Aug 1, 2022
Fluoride 1025 Inorganic Chemical 11 Mar 19, 2025
Gross Alpha Particle Activity 4109 Radionuclide 2 Feb 18, 2009
Gross Alpha, Excl. Radon & U 4000 Radionuclide 2 Feb 18, 2009
Gross Alpha, Incl. Radon & U 4002 Radionuclide 1 Sep 17, 2019
Lead 1030 Inorganic Chemical 242 Aug 19, 2025
Mercury 1035 Inorganic Chemical 10 Mar 19, 2025
Monobromoacetic Acid 2453 Organic Chemical 30 Dec 22, 2025
Monochloroacetic Acid 2450 Organic Chemical 30 Dec 22, 2025
Nickel 1036 Inorganic Chemical 10 Mar 19, 2025
Nitrate 1040 Inorganic Chemical 22 Apr 2, 2025
Nitrate-Nitrite 1038 Inorganic Chemical 22 Apr 2, 2025
Nitrite 1041 Inorganic Chemical 22 Apr 2, 2025
O-Dichlorobenzene 2968 Organic Chemical 7 Aug 1, 2022
P-Dichlorobenzene 2969 Organic Chemical 7 Aug 1, 2022
Radium-226 4020 Radionuclide 3 Sep 17, 2019
Radium-228 4030 Radionuclide 3 Sep 17, 2019
Selenium 1045 Inorganic Chemical 10 Mar 19, 2025
Sodium 1052 Inorganic Chemical 3 Feb 24, 2025
Styrene 2996 Organic Chemical 7 Aug 1, 2022
Sulfate 1055 Inorganic Chemical 3 Oct 15, 2021
Tetrachloroethylene 2987 Organic Chemical 7 Aug 1, 2022
Thallium, Total 1085 Inorganic Chemical 10 Mar 19, 2025
Toluene 2991 Organic Chemical 7 Aug 1, 2022
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 46 Dec 22, 2025
Trans-1,2-Dichloroethylene 2979 Organic Chemical 7 Aug 1, 2022
Trichloroacetic Acid 2452 Organic Chemical 30 Dec 22, 2025
Trichloroethylene 2984 Organic Chemical 7 Aug 1, 2022
TTHM 2950 Organic Chemical 49 Dec 22, 2025
Uranium-238 4009 Radionuclide 1 Mar 22, 2006
Vinyl Chloride 2976 Organic Chemical 7 Aug 1, 2022
Xylenes, Total 2955 Organic Chemical 7 Aug 1, 2022

A result is one laboratory analysis for one analyte on one sample, whether or not anything was found. Counts cover every Accepted or Validated result on record, with no date range applied.

What an analyte is

“Analytes are contaminants and other elements (some of which are not necessarily contaminants), for which the drinking water is being analyzed.”

From the help text published with these pages.