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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 281–290 of 466 samples, newest first — collected October 12, 2010 to November 10, 2011. The summary above covers all 466.

83 results from the 10 samples listed here: 0 detected, 83 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.

Chemical and radiological sample results for Copiah W/A - Bayou Pierre #1, every result from 281 to 290 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
Nov 10, 2011 09:15
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
111111-002NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Nov 10, 2011 09:15, sampling point TF103 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Nov 10, 2011 09:15, sampling point TF103 Nitrate 1040 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Nov 10, 2011 09:15, sampling point TF103 Nitrite 1041 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Collected
Nov 10, 2011 09:15
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
111111-001NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Nov 10, 2011 09:15, sampling point TF102 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Nov 10, 2011 09:15, sampling point TF102 Nitrate 1040 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Nov 10, 2011 09:15, sampling point TF102 Nitrite 1041 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Collected
Aug 25, 2011 12:05
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
110826-005CN
Laboratory
MSDH Lab
Not detected below 15 ug/l Minimum Reporting Level , sample collected Aug 25, 2011 12:05, sampling point TF103 Cyanide 1024 EPA method QC10204001X Jan 1, 2011 – Dec 31, 2013
Collected
Aug 25, 2011 12:05
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
110826-004CN
Laboratory
MSDH Lab
Not detected below 15 ug/l Minimum Reporting Level , sample collected Aug 25, 2011 12:05, sampling point TF102 Cyanide 1024 EPA method QC10204001X Jan 1, 2011 – Dec 31, 2013
Collected
Aug 25, 2011 12:05
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
110826-003CN
Laboratory
MSDH Lab
Not detected below 15 ug/l Minimum Reporting Level , sample collected Aug 25, 2011 12:05, sampling point TF101 Cyanide 1024 EPA method QC10204001X Jan 1, 2011 – Dec 31, 2013
Collected
Aug 25, 2011 12:20
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
110826-002HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Aug 25, 2011 12:20, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 25, 2011 12:20, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 25, 2011 12:20, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 25, 2011 12:20, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 25, 2011 12:20, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 0.006 mg/l Minimum Reporting Level , sample collected Aug 25, 2011 12:20, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2011 – Dec 31, 2013
Collected
Aug 25, 2011 12:20
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
110826-007TH
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 25, 2011 12:20, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 25, 2011 12:20, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 25, 2011 12:20, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 25, 2011 12:20, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
Not detected below 4 ug/l Minimum Reporting Level , sample collected Aug 25, 2011 12:20, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2011 – Dec 31, 2013
Collected
Apr 18, 2011
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
110419-038VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 18, 2011, sampling point TF103 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 18, 2011, sampling point TF103 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 18, 2011, sampling point TF103 Xylenes, Total 2955 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 18, 2011, sampling point TF103 Dichloromethane 2964 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 18, 2011, sampling point TF103 O-Dichlorobenzene 2968 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 18, 2011, sampling point TF103 P-Dichlorobenzene 2969 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 18, 2011, sampling point TF103 Vinyl Chloride 2976 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 18, 2011, sampling point TF103 1,1-Dichloroethylene 2977 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 18, 2011, sampling point TF103 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 18, 2011, sampling point TF103 1,2-Dichloroethane 2980 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 18, 2011, sampling point TF103 1,1,1-Trichloroethane 2981 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 18, 2011, sampling point TF103 Carbon Tetrachloride 2982 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 18, 2011, sampling point TF103 1,2-Dichloropropane 2983 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 18, 2011, sampling point TF103 Trichloroethylene 2984 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 18, 2011, sampling point TF103 1,1,2-Trichloroethane 2985 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 18, 2011, sampling point TF103 Tetrachloroethylene 2987 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 18, 2011, sampling point TF103 Chlorobenzene 2989 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 18, 2011, sampling point TF103 Benzene 2990 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 18, 2011, sampling point TF103 Toluene 2991 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 18, 2011, sampling point TF103 Ethylbenzene 2992 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 18, 2011, sampling point TF103 Styrene 2996 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Collected
Jan 24, 2011
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
110125-007VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 24, 2011, sampling point TF103 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 24, 2011, sampling point TF103 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 24, 2011, sampling point TF103 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 24, 2011, sampling point TF103 Dichloromethane 2964 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 24, 2011, sampling point TF103 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 24, 2011, sampling point TF103 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 24, 2011, sampling point TF103 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 24, 2011, sampling point TF103 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 24, 2011, sampling point TF103 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 24, 2011, sampling point TF103 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 24, 2011, sampling point TF103 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 24, 2011, sampling point TF103 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 24, 2011, sampling point TF103 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 24, 2011, sampling point TF103 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 24, 2011, sampling point TF103 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 24, 2011, sampling point TF103 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 24, 2011, sampling point TF103 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 24, 2011, sampling point TF103 Benzene 2990 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 24, 2011, sampling point TF103 Toluene 2991 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 24, 2011, sampling point TF103 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jan 24, 2011, sampling point TF103 Styrene 2996 EPA method 524.2 Jan 1, 2011 – Mar 31, 2011
Collected
Oct 12, 2010
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
101013-011VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 12, 2010, sampling point TF103 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 12, 2010, sampling point TF103 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 12, 2010, sampling point TF103 Xylenes, Total 2955 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 12, 2010, sampling point TF103 Dichloromethane 2964 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 12, 2010, sampling point TF103 O-Dichlorobenzene 2968 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 12, 2010, sampling point TF103 P-Dichlorobenzene 2969 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 12, 2010, sampling point TF103 Vinyl Chloride 2976 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 12, 2010, sampling point TF103 1,1-Dichloroethylene 2977 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 12, 2010, sampling point TF103 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 12, 2010, sampling point TF103 1,2-Dichloroethane 2980 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 12, 2010, sampling point TF103 1,1,1-Trichloroethane 2981 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 12, 2010, sampling point TF103 Carbon Tetrachloride 2982 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 12, 2010, sampling point TF103 1,2-Dichloropropane 2983 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 12, 2010, sampling point TF103 Trichloroethylene 2984 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 12, 2010, sampling point TF103 1,1,2-Trichloroethane 2985 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 12, 2010, sampling point TF103 Tetrachloroethylene 2987 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 12, 2010, sampling point TF103 Chlorobenzene 2989 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 12, 2010, sampling point TF103 Benzene 2990 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 12, 2010, sampling point TF103 Toluene 2991 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 12, 2010, sampling point TF103 Ethylbenzene 2992 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Oct 12, 2010, sampling point TF103 Styrene 2996 EPA method 524.2 Oct 1, 2010 – Dec 31, 2010

Routine (10).