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.
| 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 291–300 of 395 samples, newest first — collected September 18, 2007 to July 16, 2008. The summary above covers all 395.
29 results from the 10 samples listed here: 13 detected, 16 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.
| Result | Analyte | Monitoring period |
|---|---|---|
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jul 16, 2008, sampling point TF080 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2008 – Dec 31, 2008 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jul 16, 2008, sampling point TF080 | Nitrate 1040 EPA method 353.2 | Jan 1, 2008 – Dec 31, 2008 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jul 16, 2008, sampling point TF080 | Nitrite 1041 EPA method 353.2 | Jan 1, 2008 – Dec 31, 2008 |
|
||
| Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Jul 1, 2008, sampling point MRT000 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 1, 2008, sampling point MRT000 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 1, 2008, sampling point MRT000 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 1, 2008, sampling point MRT000 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 1, 2008, sampling point MRT000 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| Not detected below 0.006 mg/l Minimum Reporting Level , sample collected Jul 1, 2008, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 | Jan 1, 2008 – Dec 31, 2008 |
|
||
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 1, 2008, sampling point MRT000 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 1, 2008, sampling point MRT000 | Bromoform 2942 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 1, 2008, sampling point MRT000 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 1, 2008, sampling point MRT000 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 0 This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded a value but no unit of measure for it. The unit is NOT inferable from the analyte: many analytes are reported in more than one unit — TTHM and HAA5 in both MG/L and UG/L — so there is no per-analyte default to fall back on. The number is published as it stands and must not be compared to a limit. The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Jul 1, 2008, sampling point MRT000 | TTHM 2950 EPA method 524.2 | Jan 1, 2008 – Dec 31, 2008 |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Nov 13, 2007, sampling point TF080 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2007 – Dec 31, 2007 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Nov 13, 2007, sampling point TF080 | Nitrate 1040 EPA method 353.2 | Jan 1, 2007 – Dec 31, 2007 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Nov 13, 2007, sampling point TF080 | Nitrite 1041 EPA method 353.2 | Jan 1, 2007 – Dec 31, 2007 |
|
||
| 0.468 mg/l , sample collected Sep 19, 2007, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.0027 mg/l , sample collected Sep 19, 2007, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
|
||
| 0.3334 mg/l , sample collected Sep 18, 2007, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.0011 mg/l , sample collected Sep 18, 2007, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
|
||
| 0.4268 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 |
|
||
| 0.0296 mg/l , sample collected Sep 18, 2007, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.002 mg/l , sample collected Sep 18, 2007, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
|
||
| 0.0383 mg/l , sample collected Sep 18, 2007, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.005 mg/l , sample collected Sep 18, 2007, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
|
||
| 0.311 mg/l , sample collected Sep 18, 2007, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.0011 mg/l , sample collected Sep 18, 2007, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
-
- Collected
- Jul 16, 2008
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 080717-045NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2008 – Dec 31, 2008
-
Nitrate-Nitrite 1038 EPA method 353.2
- Result
- Not detected below 0.1 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method 353.2
- Result
- Not detected below 0.08 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method 353.2
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Jul 1, 2008
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 080702-019HA
- Laboratory
- MSDH Lab
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- Not detected below 0.002 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Total Haloacetic Acids (Haa5) 2456
- Result
- Not detected below 0.006 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2008 – Dec 31, 2008
-
- Collected
- Jul 1, 2008
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 080702-019TH
- Laboratory
- MSDH Lab
-
Chloroform 2941 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 524.2
- Result
- 0 This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded a value but no unit of measure for it. The unit is NOT inferable from the analyte: many analytes are reported in more than one unit — TTHM and HAA5 in both MG/L and UG/L — so there is no per-analyte default to fall back on. The number is published as it stands and must not be compared to a limit. The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType.
- Monitoring period
- Jan 1, 2008 – Dec 31, 2008
-
- Collected
- Nov 13, 2007
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 071114-023NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2007 – Dec 31, 2007
-
Nitrate-Nitrite 1038 EPA method 353.2
- Result
- Not detected below 0.1 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method 353.2
- Result
- Not detected below 0.08 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method 353.2
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Sep 19, 2007
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 070920-163PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.468 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0027 mg/l
-
- Collected
- Sep 18, 2007
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 070920-174PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.3334 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0011 mg/l
-
- Collected
- Sep 18, 2007
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 070920-173PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.4268 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.001 mg/l
-
- Collected
- Sep 18, 2007
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 070920-172PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0296 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.002 mg/l
-
- Collected
- Sep 18, 2007
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 070920-171PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0383 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.005 mg/l
-
- Collected
- Sep 18, 2007
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 070920-170PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.311 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0011 mg/l
Routine (10).