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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

MS0060008 , Town of Duncan

27 of the 58 analytes this system has been tested for have been detected at least once, across 278 samples on record.

The other 31 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 278 samples on record, detections range from July 20, 1993 to September 18, 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 Town of Duncan, 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 65 of 84 results Jul 20, 1993 Sep 18, 2025
Lead 1030 Inorganic Chemical 55 of 84 results Jul 20, 1993 Sep 18, 2025
TTHM 2950 Organic Chemical 43 of 45 results Sep 27, 2004 Mar 18, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 36 of 40 results Jun 21, 2007 Mar 18, 2025
Chloroform 2941 Organic Chemical 24 of 24 results Jun 21, 2007 Oct 15, 2020
Bromodichloromethane 2943 Organic Chemical 24 of 24 results Jun 21, 2007 Oct 15, 2020
Dibromochloromethane 2944 Organic Chemical 24 of 24 results Jun 21, 2007 Oct 15, 2020
Dichloroacetic Acid 2451 Organic Chemical 22 of 22 results Aug 18, 2008 Oct 15, 2020
Trichloroacetic Acid 2452 Organic Chemical 22 of 22 results Aug 18, 2008 Oct 15, 2020
Dibromoacetic Acid 2454 Organic Chemical 22 of 22 results Aug 18, 2008 Oct 15, 2020
Bromoform 2942 Organic Chemical 21 of 24 results Aug 18, 2008 Oct 15, 2020
Barium 1010 Inorganic Chemical 20 of 20 results Jan 29, 2002 Jan 15, 2025
Chromium 1020 Inorganic Chemical 16 of 20 results Jan 29, 2002 Jan 15, 2025
Fluoride 1025 Inorganic Chemical 15 of 15 results Jan 29, 2002 Jan 15, 2025
Selenium 1045 Inorganic Chemical 10 of 20 results Jan 28, 2004 Mar 27, 2024
Nickel 1036 Inorganic Chemical 9 of 20 results Mar 21, 2005 May 2, 2017
Arsenic 1005 Inorganic Chemical 8 of 20 results Mar 21, 2005 Jan 15, 2025
Monochloroacetic Acid 2450 Organic Chemical 5 of 22 results Aug 18, 2008 Jan 13, 2020
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 5 results Dec 7, 2011 Jul 11, 2012
Monobromoacetic Acid 2453 Organic Chemical 4 of 22 results Jun 26, 2018 Oct 15, 2020
Xylenes, Total 2955 Organic Chemical 4 of 23 results Sep 18, 2012 Jul 11, 2013
Gross Alpha Particle Activity 4109 Radionuclide 4 of 4 results Jun 21, 2012 Jan 23, 2013
Nitrite 1041 Inorganic Chemical 2 of 35 results Jan 10, 2022 Jan 10, 2022
Sodium 1052 Inorganic Chemical 2 of 2 results Oct 28, 2019 Oct 28, 2019
Thallium, Total 1085 Inorganic Chemical 1 of 20 results Aug 19, 2008 Aug 19, 2008
Antimony, Total 1074 Inorganic Chemical 1 of 20 results Mar 21, 2005 Mar 21, 2005
Beryllium, Total 1075 Inorganic Chemical 1 of 20 results Mar 21, 2005 Mar 21, 2005

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 11–20 of 278 samples, newest first — collected September 18, 2024 to January 15, 2025. The summary above covers all 278.

14 results from the 10 samples listed here: 8 detected, 6 not detected. Across the whole record it is 465 of 1,323. 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 2 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 Town of Duncan, every result from 11 to 20 of 278 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 15, 2025 13:55
Sampling point
TF103 Treatment Facility TF103
Sample type
Routine
Lab sample
NI-250116-018
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 15, 2025 13:55, sampling point TF103 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 15, 2025 13:55, sampling point TF103 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 15, 2025 13:55, sampling point TF103 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Jan 15, 2025 14:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-250116-017
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 15, 2025 14:00, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 15, 2025 14:00, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 15, 2025 14:00, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Dec 9, 2024 13:53
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
HA-241210-004
Laboratory
MSDH Lab
15 ug/l , sample collected Dec 9, 2024 13:53, sampling point SMT Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2024 – Dec 31, 2024
Collected
Dec 9, 2024 13:45
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
HA-241210-003
Laboratory
MSDH Lab
14.3 ug/l , sample collected Dec 9, 2024 13:45, sampling point SMH Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2024 – Dec 31, 2024
Collected
Dec 9, 2024 13:53
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
TH-241210-004
Laboratory
MSDH Lab
56.9 ug/l , sample collected Dec 9, 2024 13:53, sampling point SMT TTHM 2950 EPA method 524.2 Jan 1, 2024 – Dec 31, 2024
Collected
Dec 9, 2024 13:45
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
TH-241210-003
Laboratory
MSDH Lab
65.4 ug/l , sample collected Dec 9, 2024 13:45, sampling point SMH TTHM 2950 EPA method 524.2 Jan 1, 2024 – Dec 31, 2024
Collected
Sep 18, 2024 14:00
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
HA-240919-005
Laboratory
MSDH Lab
12.1 ug/l , sample collected Sep 18, 2024 14:00, sampling point SMT Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2024 – Dec 31, 2024
Collected
Sep 18, 2024 13:48
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
HA-240919-004
Laboratory
MSDH Lab
15.6 ug/l , sample collected Sep 18, 2024 13:48, sampling point SMH Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2024 – Dec 31, 2024
Collected
Sep 18, 2024 14:00
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
TH-240919-005
Laboratory
MSDH Lab
47.6 ug/l , sample collected Sep 18, 2024 14:00, sampling point SMT TTHM 2950 EPA method 524.2 Jan 1, 2024 – Dec 31, 2024
Collected
Sep 18, 2024 13:48
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
TH-240919-004
Laboratory
MSDH Lab
50.9 ug/l , sample collected Sep 18, 2024 13:48, sampling point SMH TTHM 2950 EPA method 524.2 Jan 1, 2024 – Dec 31, 2024

Routine (10).