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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

MS0150020 , Copiah W/A - Bayou Pierre #2

11 of the 13 analytes this system has been tested for have been detected at least once, across 135 samples on record.

The other 2 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 135 samples on record, detections range from May 4, 1994 to September 30, 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.

Every analyte ever detected for Copiah W/A - Bayou Pierre #2, 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 83 of 113 results Dec 28, 2000 Sep 30, 2025
Lead 1030 Inorganic Chemical 48 of 113 results May 4, 1994 Apr 6, 2022
TTHM 2950 Organic Chemical 9 of 11 results May 19, 2004 Oct 30, 2018
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 8 of 11 results Jun 27, 2007 Feb 5, 2025
Dibromochloromethane 2944 Organic Chemical 5 of 8 results Dec 28, 2009 Oct 30, 2018
Dichloroacetic Acid 2451 Organic Chemical 3 of 7 results Jul 10, 2012 Aug 27, 2014
Trichloroacetic Acid 2452 Organic Chemical 3 of 7 results Aug 14, 2008 Aug 27, 2014
Bromodichloromethane 2943 Organic Chemical 3 of 8 results Dec 28, 2009 Aug 27, 2014
Chloroform 2941 Organic Chemical 2 of 8 results Jun 25, 2013 Aug 27, 2014
Monochloroacetic Acid 2450 Organic Chemical 2 of 7 results Dec 28, 2009 Jul 10, 2012
Dibromoacetic Acid 2454 Organic Chemical 1 of 7 results Jun 25, 2013 Jun 25, 2013

Showing samples collected between September 25, 2024 and September 25, 2026. That is this page’s default, not a limit on what the agency records.

Show every sample on record

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The most recent samples, result by result

The table below lists 1–10 of 12 samples, newest first — collected September 30, 2024 to September 30, 2025. The summary above covers all 12.

18 results from the 10 samples listed here: 9 detected, 9 not detected. Across the whole record it is 167 of 315. 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 5 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.

Chemical and radiological sample results for Copiah W/A - Bayou Pierre #2, every result from 1 to 10 of 12 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 30, 2025 05:30
Sampling point
LC0001 Location withheld
Sample type
Routine
Lab sample
PB-251001-046
Laboratory
MSDH Lab
0.0959 mg/l , sample collected Sep 30, 2025 05:30, sampling point LC0001 Copper, Free 1022 EPA method 200.8 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 30, 2025 05:30, sampling point LC0001 Lead 1030 EPA method 200.8 Jan 1, 2025 – Dec 31, 2025
Collected
Sep 30, 2025 05:50
Sampling point
LC0002 Location withheld
Sample type
Routine
Lab sample
PB-251001-050
Laboratory
MSDH Lab
0.0898 mg/l , sample collected Sep 30, 2025 05:50, sampling point LC0002 Copper, Free 1022 EPA method 200.8 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 30, 2025 05:50, sampling point LC0002 Lead 1030 EPA method 200.8 Jan 1, 2025 – Dec 31, 2025
Collected
Sep 30, 2025 05:50
Sampling point
LC0003 Location withheld
Sample type
Routine
Lab sample
PB-251001-047
Laboratory
MSDH Lab
0.0937 mg/l , sample collected Sep 30, 2025 05:50, sampling point LC0003 Copper, Free 1022 EPA method 200.8 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 30, 2025 05:50, sampling point LC0003 Lead 1030 EPA method 200.8 Jan 1, 2025 – Dec 31, 2025
Collected
Sep 30, 2025 06:05
Sampling point
LC0004 Location withheld
Sample type
Routine
Lab sample
PB-251001-048
Laboratory
MSDH Lab
0.0917 mg/l , sample collected Sep 30, 2025 06:05, sampling point LC0004 Copper, Free 1022 EPA method 200.8 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 30, 2025 06:05, sampling point LC0004 Lead 1030 EPA method 200.8 Jan 1, 2025 – Dec 31, 2025
Collected
Sep 30, 2025 06:30
Sampling point
LC0004 Location withheld
Sample type
Routine
Lab sample
PB-251001-049
Laboratory
MSDH Lab
0.0896 mg/l , sample collected Sep 30, 2025 06:30, sampling point LC0004 Copper, Free 1022 EPA method 200.8 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 30, 2025 06:30, sampling point LC0004 Lead 1030 EPA method 200.8 Jan 1, 2025 – Dec 31, 2025
Collected
Feb 5, 2025 11:00
Sampling point
SMD Location withheld
Sample type
Routine
Lab sample
HA-250206-056
Laboratory
MSDH Lab
5.15 ug/l , sample collected Feb 5, 2025 11:00, sampling point SMD Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2023 – Dec 31, 2025
Collected
Feb 5, 2025 11:00
Sampling point
SMD Location withheld
Sample type
Routine
Lab sample
TH-250206-056
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 5, 2025 11:00, sampling point SMD TTHM 2950 EPA method 524.2 Jan 1, 2023 – Dec 31, 2025
Collected
Sep 30, 2024 05:45
Sampling point
LC0003 Location withheld
Sample type
Routine
Lab sample
PB-241001-034
Laboratory
MSDH Lab
0.0133 mg/l , sample collected Sep 30, 2024 05:45, sampling point LC0003 Copper, Free 1022 EPA method 200.8 Jan 1, 2024 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 30, 2024 05:45, sampling point LC0003 Lead 1030 EPA method 200.8 Jan 1, 2024 – Dec 31, 2024
Collected
Sep 30, 2024 06:03
Sampling point
LC0002 Location withheld
Sample type
Routine
Lab sample
PB-241001-030
Laboratory
MSDH Lab
0.0132 mg/l , sample collected Sep 30, 2024 06:03, sampling point LC0002 Copper, Free 1022 EPA method 200.8 Jan 1, 2024 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 30, 2024 06:03, sampling point LC0002 Lead 1030 EPA method 200.8 Jan 1, 2024 – Dec 31, 2024
Collected
Sep 30, 2024 06:15
Sampling point
LC0004 Location withheld
Sample type
Routine
Lab sample
PB-241001-033
Laboratory
MSDH Lab
0.013 mg/l , sample collected Sep 30, 2024 06:15, sampling point LC0004 Copper, Free 1022 EPA method 200.8 Jan 1, 2024 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 30, 2024 06:15, sampling point LC0004 Lead 1030 EPA method 200.8 Jan 1, 2024 – Dec 31, 2024

Routine (10).