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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

MS0570004 , City of McComb

25 of the 65 analytes this system has been tested for have been detected at least once, across 395 samples on record.

The other 40 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 395 samples on record, detections range from July 23, 2002 to August 19, 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 McComb, 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 242 of 242 results Jun 10, 2004 Aug 19, 2025
Lead 1030 Inorganic Chemical 159 of 242 results Jun 10, 2004 Aug 19, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 20 of 46 results Aug 8, 2005 Nov 1, 2021
Fluoride 1025 Inorganic Chemical 11 of 11 results Jul 23, 2002 Mar 19, 2025
Monochloroacetic Acid 2450 Organic Chemical 11 of 30 results Jun 11, 2012 Jun 11, 2018
Barium 1010 Inorganic Chemical 10 of 10 results Jul 23, 2002 Mar 19, 2025
Arsenic 1005 Inorganic Chemical 9 of 10 results Mar 17, 2004 Mar 19, 2025
TTHM 2950 Organic Chemical 9 of 49 results Aug 4, 2004 Aug 19, 2010
Sodium 1052 Inorganic Chemical 3 of 3 results Oct 15, 2021 Feb 24, 2025
Sulfate 1055 Inorganic Chemical 3 of 3 results Jul 23, 2002 Oct 15, 2021
Chromium 1020 Inorganic Chemical 3 of 10 results Jul 23, 2002 Dec 12, 2016
Cadmium 1015 Inorganic Chemical 2 of 10 results Apr 11, 2005 May 8, 2013
Calcium 1016 Inorganic Chemical 1 of 1 result Oct 15, 2021 Oct 15, 2021
Chloride 1017 Inorganic Chemical 1 of 1 result Oct 15, 2021 Oct 15, 2021
Conductivity @ 25 C Umhos/CM 1064 Water Quality 1 of 1 result Oct 15, 2021 Oct 15, 2021
Alkalinity, Total 1927 Water Quality 1 of 1 result Oct 15, 2021 Oct 15, 2021
Gross Alpha, Incl. Radon & U 4002 Radionuclide 1 of 1 result Sep 17, 2019 Sep 17, 2019
Combined Radium (-226 & -228) 4010 Radionuclide 1 of 3 results Sep 17, 2019 Sep 17, 2019
Radium-226 4020 Radionuclide 1 of 3 results Sep 17, 2019 Sep 17, 2019
Radium-228 4030 Radionuclide 1 of 3 results Sep 17, 2019 Sep 17, 2019
Dichloroacetic Acid 2451 Organic Chemical 1 of 30 results Dec 1, 2016 Dec 1, 2016
Nickel 1036 Inorganic Chemical 1 of 10 results May 8, 2013 May 8, 2013
Monobromoacetic Acid 2453 Organic Chemical 1 of 30 results Sep 3, 2009 Sep 3, 2009
Selenium 1045 Inorganic Chemical 1 of 10 results Apr 11, 2005 Apr 11, 2005
Dichloromethane 2964 Organic Chemical 1 of 7 results Aug 24, 2004 Aug 24, 2004

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 301–310 of 395 samples, newest first — collected September 18, 2007 to September 18, 2007. The summary above covers all 395.

20 results from the 10 samples listed here: 14 detected, 6 not detected. Across the whole record it is 495 of 1,234. 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 McComb, every result from 301 to 310 of 395 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 18, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070920-169PB
Laboratory
MSDH Lab
0.0797 mg/l , sample collected Sep 18, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Collected
Sep 18, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070920-168PB
Laboratory
MSDH Lab
0.4587 mg/l , sample collected Sep 18, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Collected
Sep 18, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070920-167PB
Laboratory
MSDH Lab
0.5804 mg/l , sample collected Sep 18, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.0056 mg/l , sample collected Sep 18, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Collected
Sep 18, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070920-166PB
Laboratory
MSDH Lab
0.2054 mg/l , sample collected Sep 18, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Collected
Sep 18, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070920-165PB
Laboratory
MSDH Lab
0.0134 mg/l , sample collected Sep 18, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Collected
Sep 18, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070920-164PB
Laboratory
MSDH Lab
0.0463 mg/l , sample collected Sep 18, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.0031 mg/l , sample collected Sep 18, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Collected
Sep 18, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070920-162PB
Laboratory
MSDH Lab
0.0873 mg/l , sample collected Sep 18, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.0012 mg/l , sample collected Sep 18, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Collected
Sep 18, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070920-161PB
Laboratory
MSDH Lab
0.0515 mg/l , sample collected Sep 18, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Collected
Sep 18, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070920-160PB
Laboratory
MSDH Lab
0.2291 mg/l , sample collected Sep 18, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.001 mg/l , sample collected Sep 18, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Collected
Sep 18, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070920-159PB
Laboratory
MSDH Lab
0.3067 mg/l , sample collected Sep 18, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007

Routine (10).