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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 271–280 of 466 samples, newest first — collected November 10, 2011 to March 22, 2012. The summary above covers all 466.

27 results from the 10 samples listed here: 2 detected, 25 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 271 to 280 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
Mar 22, 2012 11:00
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
120323-003
Laboratory
Radiation Safety Engineering
0.8 pci/l , sample collected Mar 22, 2012 11:00, sampling point TF103 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.593 pci/l Minimum Reporting Level , sample collected Mar 22, 2012 11:00, sampling point TF103 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.593 pci/l Minimum Reporting Level , sample collected Mar 22, 2012 11:00, sampling point TF103 Radium-226 4020 EPA method 903.1 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.56 pci/l Minimum Reporting Level , sample collected Mar 22, 2012 11:00, sampling point TF103 Radium-228 4030 EPA method 904.0 Jan 1, 2012 – Mar 31, 2012
Collected
Mar 22, 2012 10:40
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120323-002
Laboratory
Radiation Safety Engineering
Not detected below 0.42 pci/l Minimum Reporting Level , sample collected Mar 22, 2012 10:40, sampling point TF102 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.8 pci/l Minimum Reporting Level , sample collected Mar 22, 2012 10:40, sampling point TF102 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.727 pci/l Minimum Reporting Level , sample collected Mar 22, 2012 10:40, sampling point TF102 Radium-226 4020 EPA method 903.1 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.8 pci/l Minimum Reporting Level , sample collected Mar 22, 2012 10:40, sampling point TF102 Radium-228 4030 EPA method 904.0 Jan 1, 2012 – Mar 31, 2012
Collected
Mar 22, 2012 10:30
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
120323-001
Laboratory
Radiation Safety Engineering
0.6 pci/l , sample collected Mar 22, 2012 10:30, sampling point TF101 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.752 pci/l Minimum Reporting Level , sample collected Mar 22, 2012 10:30, sampling point TF101 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.752 pci/l Minimum Reporting Level , sample collected Mar 22, 2012 10:30, sampling point TF101 Radium-226 4020 EPA method 903.1 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.44 pci/l Minimum Reporting Level , sample collected Mar 22, 2012 10:30, sampling point TF101 Radium-228 4030 EPA method 904.0 Jan 1, 2012 – Mar 31, 2012
Collected
Mar 22, 2012 11:00
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
120323-003RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 22, 2012 11:00, sampling point TF103 Combined Uranium 4006 EPA method 200.8 Jan 1, 2012 – Mar 31, 2012
Collected
Mar 22, 2012 10:40
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120323-002RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 22, 2012 10:40, sampling point TF102 Combined Uranium 4006 EPA method 200.8 Jan 1, 2012 – Mar 31, 2012
Collected
Mar 22, 2012 10:30
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
120323-001RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 22, 2012 10:30, sampling point TF101 Combined Uranium 4006 EPA method 200.8 Jan 1, 2012 – Mar 31, 2012
Collected
Jan 17, 2012 07:40
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120118-049NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 17, 2012 07:40, sampling point TF102 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 17, 2012 07:40, sampling point TF102 Nitrate 1040 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 17, 2012 07:40, sampling point TF102 Nitrite 1041 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Collected
Jan 17, 2012 07:40
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
120118-048NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 17, 2012 07:40, sampling point TF103 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 17, 2012 07:40, sampling point TF103 Nitrate 1040 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 17, 2012 07:40, sampling point TF103 Nitrite 1041 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Collected
Jan 17, 2012 07:40
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
120118-047NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 17, 2012 07:40, sampling point TF101 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 17, 2012 07:40, sampling point TF101 Nitrate 1040 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 17, 2012 07:40, sampling point TF101 Nitrite 1041 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Collected
Nov 10, 2011 09:15
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
111111-003NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Nov 10, 2011 09:15, sampling point TF101 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 TF101 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 TF101 Nitrite 1041 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011

Routine (10).