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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

MS0150001 , Copiah W/A - Bayou Pierre #1

23 of the 62 analytes this system has been tested for have been detected at least once, across 466 samples on record.

The other 39 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 466 samples on record, detections range from May 4, 1994 to June 2, 2026. 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 Copiah W/A - Bayou Pierre #1, 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 153 of 223 results Dec 27, 2001 Sep 30, 2025
Lead 1030 Inorganic Chemical 127 of 223 results May 4, 1994 Sep 30, 2025
Barium 1010 Inorganic Chemical 34 of 34 results Nov 20, 2003 Feb 5, 2025
Fluoride 1025 Inorganic Chemical 31 of 35 results Nov 20, 2003 Feb 5, 2025
Nickel 1036 Inorganic Chemical 14 of 34 results Nov 20, 2003 May 23, 2022
Chromium 1020 Inorganic Chemical 13 of 34 results Nov 20, 2003 Feb 5, 2025
Gross Alpha, Incl. Radon & U 4002 Radionuclide 10 of 15 results Mar 22, 2012 Oct 9, 2012
Sodium 1052 Inorganic Chemical 9 of 9 results Oct 28, 2019 Oct 15, 2024
TTHM 2950 Organic Chemical 7 of 12 results Jun 27, 2007 Jun 2, 2026
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 7 of 13 results Jun 27, 2007 Mar 13, 2024
Sulfate 1055 Inorganic Chemical 7 of 7 results Nov 20, 2003 Mar 11, 2021
Chloroform 2941 Organic Chemical 3 of 8 results Aug 27, 2014 Jun 2, 2026
Bromodichloromethane 2943 Organic Chemical 3 of 8 results Aug 27, 2014 Jun 2, 2026
Dibromochloromethane 2944 Organic Chemical 3 of 8 results Aug 27, 2014 Jun 2, 2026
Cadmium 1015 Inorganic Chemical 3 of 34 results Mar 2, 2005 Mar 2, 2005
Selenium 1045 Inorganic Chemical 3 of 34 results Mar 2, 2005 Mar 2, 2005
Dichloroacetic Acid 2451 Organic Chemical 2 of 7 results Aug 27, 2014 Aug 11, 2020
Trichloroacetic Acid 2452 Organic Chemical 2 of 7 results Aug 27, 2014 Aug 11, 2020
Xylenes, Total 2955 Organic Chemical 2 of 53 results Dec 28, 2004 Jan 24, 2005
Ethylbenzene 2992 Organic Chemical 2 of 53 results Dec 28, 2004 Jan 24, 2005
Chloride 1017 Inorganic Chemical 1 of 1 result Mar 11, 2021 Mar 11, 2021
Conductivity @ 25 C Umhos/CM 1064 Water Quality 1 of 1 result Mar 11, 2021 Mar 11, 2021
Alkalinity, Total 1927 Water Quality 1 of 1 result Mar 11, 2021 Mar 11, 2021

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 101–110 of 466 samples, newest first — collected April 27, 2022 to December 28, 2022. The summary above covers all 466.

84 results from the 10 samples listed here: 13 detected, 71 not detected. Across the whole record it is 438 of 2,348. 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 4 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 #1, every result from 101 to 110 of 466 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
Dec 28, 2022 08:30
Sampling point
LC0029 Location withheld
Sample type
Routine
Lab sample
PB-221229-004
Laboratory
MSDH Lab
0.017 mg/l , sample collected Dec 28, 2022 08:30, sampling point LC0029 Copper, Free 1022 EPA method 200.8 Jul 1, 2022 – Dec 31, 2022
0.8 ug/l , sample collected Dec 28, 2022 08:30, sampling point LC0029 Lead 1030 EPA method 200.8 Jul 1, 2022 – Dec 31, 2022
Collected
Dec 28, 2022 07:00
Sampling point
LC0017 Location withheld
Sample type
Routine
Lab sample
PB-221229-009
Laboratory
MSDH Lab
0.0085 mg/l , sample collected Dec 28, 2022 07:00, sampling point LC0017 Copper, Free 1022 EPA method 200.8 Jul 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 28, 2022 07:00, sampling point LC0017 Lead 1030 EPA method 200.8 Jul 1, 2022 – Dec 31, 2022
Collected
Dec 28, 2022 08:30
Sampling point
LC0028 Location withheld
Sample type
Routine
Lab sample
PB-221229-005
Laboratory
MSDH Lab
0.0602 mg/l , sample collected Dec 28, 2022 08:30, sampling point LC0028 Copper, Free 1022 EPA method 200.8 Jul 1, 2022 – Dec 31, 2022
0.6 ug/l , sample collected Dec 28, 2022 08:30, sampling point LC0028 Lead 1030 EPA method 200.8 Jul 1, 2022 – Dec 31, 2022
Collected
Dec 28, 2022 06:00
Sampling point
LC0015 Location withheld
Sample type
Routine
Lab sample
PB-221229-010
Laboratory
MSDH Lab
0.113 mg/l , sample collected Dec 28, 2022 06:00, sampling point LC0015 Copper, Free 1022 EPA method 200.8 Jul 1, 2022 – Dec 31, 2022
0.5 ug/l , sample collected Dec 28, 2022 06:00, sampling point LC0015 Lead 1030 EPA method 200.8 Jul 1, 2022 – Dec 31, 2022
Collected
Dec 28, 2022 09:40
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-221229-003
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 28, 2022 09:40, sampling point MRT000 TTHM 2950 EPA method 524.2 Not recorded
Collected
May 23, 2022 11:30
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
IN-220524-010
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 11:30, sampling point TF103 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0199 mg/l , sample collected May 23, 2022 11:30, sampling point TF103 Barium 1010 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 11:30, sampling point TF103 Cadmium 1015 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 11:30, sampling point TF103 Chromium 1020 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected May 23, 2022 11:30, sampling point TF103 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 11:30, sampling point TF103 Mercury 1035 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0015 mg/l , sample collected May 23, 2022 11:30, sampling point TF103 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected May 23, 2022 11:30, sampling point TF103 Selenium 1045 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 11:30, sampling point TF103 Antimony, Total 1074 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 11:30, sampling point TF103 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 11:30, sampling point TF103 Thallium, Total 1085 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
May 23, 2022 11:40
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
IN-220524-011
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 11:40, sampling point TF102 Arsenic 1005 EPA method 200.8 Not recorded
0.0197 mg/l , sample collected May 23, 2022 11:40, sampling point TF102 Barium 1010 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 11:40, sampling point TF102 Cadmium 1015 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 11:40, sampling point TF102 Chromium 1020 EPA method 200.8 Not recorded
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected May 23, 2022 11:40, sampling point TF102 Fluoride 1025 EPA method QC 10-109-12-2-A Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 11:40, sampling point TF102 Mercury 1035 EPA method 200.8 Not recorded
0.001 mg/l , sample collected May 23, 2022 11:40, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected May 23, 2022 11:40, sampling point TF102 Selenium 1045 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 11:40, sampling point TF102 Antimony, Total 1074 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 11:40, sampling point TF102 Beryllium, Total 1075 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 11:40, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Not recorded
Collected
May 23, 2022 12:00
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-220524-012
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 12:00, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0196 mg/l , sample collected May 23, 2022 12:00, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 12:00, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 12:00, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected May 23, 2022 12:00, sampling point TF101 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 12:00, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0016 mg/l , sample collected May 23, 2022 12:00, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected May 23, 2022 12:00, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 12:00, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 12:00, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 23, 2022 12:00, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Apr 27, 2022 12:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
VO-220428-002
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:00, sampling point TF102 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:00, sampling point TF102 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:00, sampling point TF102 Xylenes, Total 2955 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:00, sampling point TF102 Dichloromethane 2964 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:00, sampling point TF102 O-Dichlorobenzene 2968 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:00, sampling point TF102 P-Dichlorobenzene 2969 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:00, sampling point TF102 Vinyl Chloride 2976 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:00, sampling point TF102 1,1-Dichloroethylene 2977 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:00, sampling point TF102 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:00, sampling point TF102 1,2-Dichloroethane 2980 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:00, sampling point TF102 1,1,1-Trichloroethane 2981 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:00, sampling point TF102 Carbon Tetrachloride 2982 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:00, sampling point TF102 1,2-Dichloropropane 2983 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:00, sampling point TF102 Trichloroethylene 2984 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:00, sampling point TF102 1,1,2-Trichloroethane 2985 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:00, sampling point TF102 Tetrachloroethylene 2987 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:00, sampling point TF102 Chlorobenzene 2989 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:00, sampling point TF102 Benzene 2990 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:00, sampling point TF102 Toluene 2991 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:00, sampling point TF102 Ethylbenzene 2992 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:00, sampling point TF102 Styrene 2996 EPA method 524.2 Not recorded
Collected
Apr 27, 2022 12:25
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
VO-220428-001
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:25, sampling point TF101 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:25, sampling point TF101 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:25, sampling point TF101 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:25, sampling point TF101 Dichloromethane 2964 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:25, sampling point TF101 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:25, sampling point TF101 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:25, sampling point TF101 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:25, sampling point TF101 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:25, sampling point TF101 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:25, sampling point TF101 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:25, sampling point TF101 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:25, sampling point TF101 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:25, sampling point TF101 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:25, sampling point TF101 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:25, sampling point TF101 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:25, sampling point TF101 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:25, sampling point TF101 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:25, sampling point TF101 Benzene 2990 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:25, sampling point TF101 Toluene 2991 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:25, sampling point TF101 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 27, 2022 12:25, sampling point TF101 Styrene 2996 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022

Routine (10).