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; the list of samples further down is narrowed.
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.
| 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 |
Showing samples collected between September 26, 2024 and September 26, 2026. That is this page’s default, not a limit on what the agency records.
Choose a date range
The most recent samples, result by result
The table below lists 11–20 of 33 samples, newest first — collected June 20, 2025 to August 15, 2025. The summary above covers all 33.
20 results from the 10 samples listed here: 20 detected, 0 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.
We withheld the location of 8 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.
| Result | Analyte | Monitoring period |
|---|---|---|
|
||
| 0.0322 mg/l , sample collected Aug 15, 2025 07:00, sampling point LC010 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
| 3.3 ug/l , sample collected Aug 15, 2025 07:00, sampling point LC010 | Lead 1030 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
|
||
| 0.0063 mg/l , sample collected Aug 15, 2025 07:08, sampling point LC009 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
| 1.1 ug/l , sample collected Aug 15, 2025 07:08, sampling point LC009 | Lead 1030 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
|
||
| 0.411 mg/l , sample collected Aug 15, 2025 06:36, sampling point LC008 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
| 0.9 ug/l , sample collected Aug 15, 2025 06:36, sampling point LC008 | Lead 1030 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
|
||
| 0.154 mg/l , sample collected Aug 15, 2025 05:35, sampling point LC006 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
| 3.2 ug/l , sample collected Aug 15, 2025 05:35, sampling point LC006 | Lead 1030 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
|
||
| 0.0205 mg/l , sample collected Aug 15, 2025 07:50, sampling point LC005 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
| 1.2 ug/l , sample collected Aug 15, 2025 07:50, sampling point LC005 | Lead 1030 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
|
||
| 0.373 mg/l , sample collected Aug 15, 2025 06:00, sampling point LC002 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
| 3 ug/l , sample collected Aug 15, 2025 06:00, sampling point LC002 | Lead 1030 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
|
||
| 0.0432 mg/l , sample collected Aug 15, 2025 01:00, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
| 3.1 ug/l , sample collected Aug 15, 2025 01:00, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
|
||
| 0.0098 mg/l , sample collected Jun 30, 2025 07:00, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
| 5.6 ug/l , sample collected Jun 30, 2025 07:00, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
|
||
| 0.676 mg/l , sample collected Jun 22, 2025 07:00, sampling point LC040 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
| 7.6 ug/l , sample collected Jun 22, 2025 07:00, sampling point LC040 | Lead 1030 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
|
||
| 0.0194 mg/l , sample collected Jun 20, 2025 05:05, sampling point LC004 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
| 17.6 ug/l , sample collected Jun 20, 2025 05:05, sampling point LC004 | Lead 1030 EPA method 200.8 | Jan 1, 2023 – Dec 31, 2025 |
-
- Collected
- Aug 15, 2025 07:00
- Sampling point
- LC010 Location withheld
- Sample type
- Routine
- Lab sample
- PB-250821-091
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2023 – Dec 31, 2025
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0322 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 3.3 ug/l
-
- Collected
- Aug 15, 2025 07:08
- Sampling point
- LC009 Location withheld
- Sample type
- Routine
- Lab sample
- PB-250821-100
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2023 – Dec 31, 2025
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0063 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 1.1 ug/l
-
- Collected
- Aug 15, 2025 06:36
- Sampling point
- LC008 Location withheld
- Sample type
- Routine
- Lab sample
- PB-250821-092
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2023 – Dec 31, 2025
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.411 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.9 ug/l
-
- Collected
- Aug 15, 2025 05:35
- Sampling point
- LC006 Location withheld
- Sample type
- Routine
- Lab sample
- PB-250821-093
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2023 – Dec 31, 2025
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.154 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 3.2 ug/l
-
- Collected
- Aug 15, 2025 07:50
- Sampling point
- LC005 Location withheld
- Sample type
- Routine
- Lab sample
- PB-250821-098
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2023 – Dec 31, 2025
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0205 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 1.2 ug/l
-
- Collected
- Aug 15, 2025 06:00
- Sampling point
- LC002 Location withheld
- Sample type
- Routine
- Lab sample
- PB-250821-095
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2023 – Dec 31, 2025
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.373 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 3 ug/l
-
- Collected
- Aug 15, 2025 01:00
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- PB-250821-096
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2023 – Dec 31, 2025
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0432 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 3.1 ug/l
-
- Collected
- Jun 30, 2025 07:00
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- PB-250701-059
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2023 – Dec 31, 2025
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0098 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 5.6 ug/l
-
- Collected
- Jun 22, 2025 07:00
- Sampling point
- LC040 Location withheld
- Sample type
- Routine
- Lab sample
- PB-250701-043
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2023 – Dec 31, 2025
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.676 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 7.6 ug/l
-
- Collected
- Jun 20, 2025 05:05
- Sampling point
- LC004 Location withheld
- Sample type
- Routine
- Lab sample
- PB-250701-067
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2023 – Dec 31, 2025
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0194 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 17.6 ug/l
Routine (10).