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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 61–70 of 354 samples, newest first — collected January 14, 2020 to January 19, 2021. The summary above covers all 354.

41 results from the 10 samples listed here: 14 detected, 27 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 61 to 70 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
Jan 19, 2021 15:00
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
NA-210120-001
Laboratory
MSDH Lab
109 mg/l , sample collected Jan 19, 2021 15:00, sampling point TF103 Sodium 1052 EPA method 200.7 Not recorded
Collected
Jan 19, 2021 14:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NA-210120-018
Laboratory
MSDH Lab
57.7 mg/l , sample collected Jan 19, 2021 14:00, sampling point TF102 Sodium 1052 EPA method 200.7 Not recorded
Collected
Jan 19, 2021 15:00
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
NI-210120-027
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 19, 2021 15:00, sampling point TF103 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 19, 2021 15:00, sampling point TF103 Nitrate 1040 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 19, 2021 15:00, sampling point TF103 Nitrite 1041 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021
Collected
Jan 19, 2021 14:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-210120-028
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 19, 2021 14:00, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 19, 2021 14:00, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 19, 2021 14:00, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021
Collected
Dec 17, 2020 13:30
Sampling point
SM2 Emmitt Erving 3675 Ar 3007
Sample type
Routine
Lab sample
201218-001HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Dec 17, 2020 13:30, sampling point SM2 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.01 mg/l , sample collected Dec 17, 2020 13:30, sampling point SM2 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.011 mg/l , sample collected Dec 17, 2020 13:30, sampling point SM2 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
0.002 mg/l , sample collected Dec 17, 2020 13:30, sampling point SM2 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
0.003 mg/l , sample collected Dec 17, 2020 13:30, sampling point SM2 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.03 mg/l , sample collected Dec 17, 2020 13:30, sampling point SM2 Total Haloacetic Acids (Haa5) 2456 Not recorded
Collected
Apr 9, 2020 14:30
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
CN-200410-005
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Apr 9, 2020 14:30, sampling point TF103 Cyanide 1024 EPA method QC10204001X Jan 1, 2020 – Dec 31, 2022
Collected
Apr 9, 2020 14:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
CN-200410-004
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Apr 9, 2020 14:00, sampling point TF102 Cyanide 1024 EPA method QC10204001X Jan 1, 2020 – Dec 31, 2022
Collected
Apr 1, 2020 13:00
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
200402-004IN
Laboratory
MSDH Lab
0.0007 mg/l , sample collected Apr 1, 2020 13:00, sampling point TF103 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0149 mg/l , sample collected Apr 1, 2020 13:00, 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 Apr 1, 2020 13:00, sampling point TF103 Cadmium 1015 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0036 mg/l , sample collected Apr 1, 2020 13:00, sampling point TF103 Chromium 1020 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.138 mg/l , sample collected Apr 1, 2020 13:00, 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 Apr 1, 2020 13:00, sampling point TF103 Mercury 1035 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 1, 2020 13:00, sampling point TF103 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 1, 2020 13:00, 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 Apr 1, 2020 13:00, 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 Apr 1, 2020 13:00, 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 Apr 1, 2020 13:00, sampling point TF103 Thallium, Total 1085 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Apr 1, 2020 12:30
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
200402-003IN
Laboratory
MSDH Lab
0.001 mg/l , sample collected Apr 1, 2020 12:30, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0251 mg/l , sample collected Apr 1, 2020 12:30, sampling point TF102 Barium 1010 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 1, 2020 12:30, sampling point TF102 Cadmium 1015 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0019 mg/l , sample collected Apr 1, 2020 12:30, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 1, 2020 12:30, sampling point TF102 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 Apr 1, 2020 12:30, sampling point TF102 Mercury 1035 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 1, 2020 12:30, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 1, 2020 12:30, sampling point TF102 Selenium 1045 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 1, 2020 12:30, sampling point TF102 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 Apr 1, 2020 12:30, sampling point TF102 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 Apr 1, 2020 12:30, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Jan 14, 2020 13:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
200115-048NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 14, 2020 13:00, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2020 – Dec 31, 2020
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 14, 2020 13:00, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2020 – Dec 31, 2020
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 14, 2020 13:00, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2020 – Dec 31, 2020

Routine (10).