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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 31–40 of 278 samples, newest first — collected April 11, 2022 to November 9, 2022. The summary above covers all 278.

25 results from the 10 samples listed here: 17 detected, 8 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 7 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 31 to 40 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
Nov 9, 2022 14:10
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
TH-221110-015
Laboratory
MSDH Lab
58.8 ug/l , sample collected Nov 9, 2022 14:10, sampling point SMH TTHM 2950 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Collected
Jul 20, 2022 13:33
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
TH-220721-004
Laboratory
MSDH Lab
9.97 ug/l , sample collected Jul 20, 2022 13:33, sampling point SMT TTHM 2950 EPA method 524.2 Jul 1, 2022 – Sep 30, 2022
Collected
Jul 20, 2022 13:25
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
TH-220721-003
Laboratory
MSDH Lab
11.5 ug/l , sample collected Jul 20, 2022 13:25, sampling point SMH TTHM 2950 EPA method 524.2 Jul 1, 2022 – Sep 30, 2022
Collected
Jun 13, 2022 05:40
Sampling point
LC0015 Location withheld
Sample type
Routine
Lab sample
PB-220614-076
Laboratory
MSDH Lab
0.0391 mg/l , sample collected Jun 13, 2022 05:40, sampling point LC0015 Copper, Free 1022 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
1 ug/l , sample collected Jun 13, 2022 05:40, sampling point LC0015 Lead 1030 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Jun 13, 2022 09:35
Sampling point
LC0001 Location withheld
Sample type
Routine
Lab sample
PB-220614-075
Laboratory
MSDH Lab
0.082 mg/l , sample collected Jun 13, 2022 09:35, sampling point LC0001 Copper, Free 1022 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.7 ug/l , sample collected Jun 13, 2022 09:35, sampling point LC0001 Lead 1030 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Jun 13, 2022 05:30
Sampling point
LC0017 Location withheld
Sample type
Routine
Lab sample
PB-220614-074
Laboratory
MSDH Lab
0.146 mg/l , sample collected Jun 13, 2022 05:30, sampling point LC0017 Copper, Free 1022 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2022 05:30, sampling point LC0017 Lead 1030 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Jun 13, 2022 09:30
Sampling point
LC0016 Location withheld
Sample type
Routine
Lab sample
PB-220614-073
Laboratory
MSDH Lab
0.649 mg/l , sample collected Jun 13, 2022 09:30, sampling point LC0016 Copper, Free 1022 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.6 ug/l , sample collected Jun 13, 2022 09:30, sampling point LC0016 Lead 1030 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Jun 13, 2022 10:20
Sampling point
LC0005 Location withheld
Sample type
Routine
Lab sample
PB-220614-072
Laboratory
MSDH Lab
0.343 mg/l , sample collected Jun 13, 2022 10:20, sampling point LC0005 Copper, Free 1022 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 13, 2022 10:20, sampling point LC0005 Lead 1030 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
May 2, 2022 12:30
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
IN-220503-001
Laboratory
MSDH Lab
0.0009 mg/l , sample collected May 2, 2022 12:30, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.009 mg/l , sample collected May 2, 2022 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 May 2, 2022 12:30, sampling point TF102 Cadmium 1015 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0009 mg/l , sample collected May 2, 2022 12:30, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.355 mg/l , sample collected May 2, 2022 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 May 2, 2022 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 May 2, 2022 12:30, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
0.0052 mg/l , sample collected May 2, 2022 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 May 2, 2022 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 May 2, 2022 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 May 2, 2022 12:30, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Apr 11, 2022 12:21
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
HA-220412-006
Laboratory
MSDH Lab
12.6 ug/l , sample collected Apr 11, 2022 12:21, sampling point SMT Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Apr 1, 2022 – Jun 30, 2022

Routine (10).