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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

MS0040008 , Possumneck-Carmack W/A

24 of the 57 analytes this system has been tested for have been detected at least once, across 354 samples on record.

The other 33 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 354 samples on record, detections range from September 8, 1993 to December 17, 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.

Every analyte ever detected for Possumneck-Carmack W/A, 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 142 of 150 results Sep 8, 1993 Sep 23, 2025
Lead 1030 Inorganic Chemical 78 of 150 results Sep 8, 1993 Sep 23, 2025
TTHM 2950 Organic Chemical 40 of 41 results May 3, 2004 Dec 17, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 37 of 41 results Jun 21, 2005 Dec 17, 2025
Chloroform 2941 Organic Chemical 25 of 26 results Mar 27, 2006 Dec 17, 2025
Bromodichloromethane 2943 Organic Chemical 24 of 26 results Mar 27, 2006 Dec 17, 2025
Dibromochloromethane 2944 Organic Chemical 24 of 26 results Mar 27, 2006 Dec 17, 2025
Barium 1010 Inorganic Chemical 24 of 24 results Jan 29, 2002 Mar 5, 2025
Dichloroacetic Acid 2451 Organic Chemical 18 of 20 results Jan 29, 2008 Dec 17, 2025
Trichloroacetic Acid 2452 Organic Chemical 18 of 20 results Jan 29, 2008 Dec 17, 2025
Chromium 1020 Inorganic Chemical 15 of 24 results Jan 29, 2002 Jan 29, 2025
Dibromoacetic Acid 2454 Organic Chemical 14 of 20 results Jan 29, 2008 Dec 17, 2025
Fluoride 1025 Inorganic Chemical 11 of 24 results Sep 8, 2003 Mar 5, 2025
Gross Alpha, Incl. Radon & U 4002 Radionuclide 10 of 10 results Dec 6, 2011 Jul 10, 2012
Bromoform 2942 Organic Chemical 8 of 26 results May 4, 2009 Dec 17, 2025
Sodium 1052 Inorganic Chemical 6 of 6 results Sep 30, 2019 Oct 30, 2024
Arsenic 1005 Inorganic Chemical 6 of 24 results Jan 12, 2004 Apr 1, 2020
Selenium 1045 Inorganic Chemical 6 of 24 results Sep 8, 2003 May 4, 2011
Nickel 1036 Inorganic Chemical 5 of 24 results Mar 10, 2008 Jan 29, 2025
Monochloroacetic Acid 2450 Organic Chemical 5 of 20 results Nov 9, 2009 Apr 15, 2019
Monobromoacetic Acid 2453 Organic Chemical 4 of 20 results Sep 11, 2017 Dec 17, 2020
Sulfate 1055 Inorganic Chemical 2 of 6 results Jan 29, 2002 Jan 12, 2004
Xylenes, Total 2955 Organic Chemical 1 of 14 results May 2, 2022 May 2, 2022
Cyanide 1024 Inorganic Chemical 1 of 20 results Apr 16, 2018 Apr 16, 2018

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 131–140 of 354 samples, newest first — collected July 9, 2012 to June 10, 2014. The summary above covers all 354.

31 results from the 10 samples listed here: 5 detected, 26 not detected. Across the whole record it is 524 of 1,360. 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 Possumneck-Carmack W/A, every result from 131 to 140 of 354 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
Jun 10, 2014 06:10
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140611-056PB
Laboratory
MSDH Lab
0.2772 mg/l , sample collected Jun 10, 2014 06:10, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 10, 2014 06:10, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Jan 21, 2014 01:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
140122-014NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 21, 2014 01:00, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2014 – Dec 31, 2014
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 21, 2014 01:00, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2014 – Dec 31, 2014
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 21, 2014 01:00, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2014 – Dec 31, 2014
Collected
Jan 21, 2014 01:30
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
140122-013NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 21, 2014 01:30, sampling point TF103 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2014 – Dec 31, 2014
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 21, 2014 01:30, sampling point TF103 Nitrate 1040 EPA method QC10107041C Jan 1, 2014 – Dec 31, 2014
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 21, 2014 01:30, sampling point TF103 Nitrite 1041 EPA method QC10107041C Jan 1, 2014 – Dec 31, 2014
Collected
Jan 14, 2013 03:30
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
130115-029NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 14, 2013 03:30, sampling point TF103 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 14, 2013 03:30, sampling point TF103 Nitrate 1040 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 14, 2013 03:30, sampling point TF103 Nitrite 1041 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Collected
Jan 14, 2013 02:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
130115-028NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 14, 2013 02:00, sampling point TF102 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 14, 2013 02:00, sampling point TF102 Nitrate 1040 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 14, 2013 02:00, sampling point TF102 Nitrite 1041 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Collected
Jul 10, 2012 02:00
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
201211290073
Laboratory
Radiation Safety Engineering
0.8 pci/l , sample collected Jul 10, 2012 02:00, sampling point TF103 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.39 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 02:00, sampling point TF103 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.235 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 02:00, sampling point TF103 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.39 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 02:00, sampling point TF103 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 10, 2012 01:30
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
201211290071
Laboratory
Radiation Safety Engineering
0.7 pci/l , sample collected Jul 10, 2012 01:30, sampling point TF102 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.508 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 01:30, sampling point TF102 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.508 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 01:30, sampling point TF102 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.27 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 01:30, sampling point TF102 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 9, 2012 16:00
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
120710-074
Laboratory
Radiation Safety Engineering
0.8 pci/l , sample collected Jul 9, 2012 16:00, sampling point TF103 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.39 pci/l Minimum Reporting Level , sample collected Jul 9, 2012 16:00, sampling point TF103 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.235 pci/l Minimum Reporting Level , sample collected Jul 9, 2012 16:00, sampling point TF103 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.39 pci/l Minimum Reporting Level , sample collected Jul 9, 2012 16:00, sampling point TF103 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 9, 2012 15:45
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120710-073
Laboratory
Radiation Safety Engineering
0.7 pci/l , sample collected Jul 9, 2012 15:45, sampling point TF102 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.508 pci/l Minimum Reporting Level , sample collected Jul 9, 2012 15:45, sampling point TF102 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.508 pci/l Minimum Reporting Level , sample collected Jul 9, 2012 15:45, sampling point TF102 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.27 pci/l Minimum Reporting Level , sample collected Jul 9, 2012 15:45, sampling point TF102 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 9, 2012 16:00
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
120710-074RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 9, 2012 16:00, sampling point TF103 Combined Uranium 4006 EPA method 200.8 Jul 1, 2012 – Sep 30, 2012

Routine (10).