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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

MS0070007 , Duncan Hill Water Supply

39 of the 73 analytes this system has been tested for have been detected at least once, across 259 samples on record.

The other 34 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 259 samples on record, detections range from September 8, 1993 to July 25, 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 Duncan Hill Water Supply, 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 68 of 80 results Sep 8, 1993 Jul 25, 2026
Lead 1030 Inorganic Chemical 37 of 80 results Sep 8, 1993 Jul 25, 2026
Fluoride 1025 Inorganic Chemical 27 of 27 results Jul 2, 2002 Jan 14, 2025
Barium 1010 Inorganic Chemical 26 of 26 results Jul 2, 2002 Jan 14, 2025
Arsenic 1005 Inorganic Chemical 25 of 26 results Jul 2, 2002 Jan 14, 2025
Nickel 1036 Inorganic Chemical 21 of 26 results Jul 2, 2002 Jan 14, 2025
Selenium 1045 Inorganic Chemical 16 of 26 results Jul 2, 2002 Feb 20, 2024
Xylenes, Total 2955 Organic Chemical 15 of 32 results Jan 25, 2018 Jan 17, 2023
Chromium 1020 Inorganic Chemical 12 of 26 results Jan 21, 2004 Jan 14, 2025
TTHM 2950 Organic Chemical 7 of 8 results May 5, 2004 Sep 12, 2022
Combined Radium (-226 & -228) 4010 Radionuclide 7 of 16 results Dec 6, 2011 Jan 28, 2013
Radium-226 4020 Radionuclide 7 of 16 results Dec 6, 2011 Jan 28, 2013
Sodium 1052 Inorganic Chemical 6 of 6 results Mar 14, 2017 Oct 22, 2024
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 6 of 8 results Jun 25, 2007 Sep 12, 2022
Nitrate-Nitrite 1038 Inorganic Chemical 5 of 48 results May 5, 2004 Mar 4, 2013
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 12 results Dec 6, 2011 Jul 11, 2012
Radium-228 4030 Radionuclide 5 of 16 results Dec 6, 2011 Jul 11, 2012
Nitrite 1041 Inorganic Chemical 4 of 48 results Apr 9, 2007 Jan 10, 2024
Dibromoacetic Acid 2454 Organic Chemical 4 of 4 results Aug 11, 2008 Sep 6, 2017
Bromoform 2942 Organic Chemical 4 of 4 results Jun 25, 2007 Sep 6, 2017
Nitrate 1040 Inorganic Chemical 4 of 48 results May 5, 2004 Mar 4, 2013
Gross Alpha Particle Activity 4109 Radionuclide 2 of 4 results Dec 12, 2012 Jan 28, 2013
Monochloroacetic Acid 2450 Organic Chemical 1 of 4 results Sep 6, 2017 Sep 6, 2017
Calcium 1016 Inorganic Chemical 1 of 1 result Mar 14, 2017 Mar 14, 2017
Chloride 1017 Inorganic Chemical 1 of 1 result Mar 14, 2017 Mar 14, 2017
Iron 1028 Inorganic Chemical 1 of 1 result Mar 14, 2017 Mar 14, 2017
Magnesium 1031 Inorganic Chemical 1 of 1 result Mar 14, 2017 Mar 14, 2017
Manganese 1032 Inorganic Chemical 1 of 1 result Mar 14, 2017 Mar 14, 2017
Potassium 1042 Inorganic Chemical 1 of 1 result Mar 14, 2017 Mar 14, 2017
Residue, Total, Filterable 1057 Water Quality 1 of 1 result Mar 14, 2017 Mar 14, 2017
Carbon Dioxide 1901 Water Quality 1 of 1 result Mar 14, 2017 Mar 14, 2017
Color 1905 Water Quality 1 of 1 result Mar 14, 2017 Mar 14, 2017
Hardness, Total (As Caco3) 1915 Water Quality 1 of 1 result Mar 14, 2017 Mar 14, 2017
Alkalinity, Total 1927 Water Quality 1 of 1 result Mar 14, 2017 Mar 14, 2017
Iron, Field Result FEFD Inorganic Chemical 1 of 1 result Mar 14, 2017 Mar 14, 2017
Calculated Sodium NACA Water Quality 1 of 1 result Mar 14, 2017 Mar 14, 2017
PH, Field Result PHFD Water Quality 1 of 1 result Mar 14, 2017 Mar 14, 2017
Dichloroacetic Acid 2451 Organic Chemical 1 of 4 results Aug 11, 2014 Aug 11, 2014
Dibromochloromethane 2944 Organic Chemical 1 of 4 results Jul 11, 2011 Jul 11, 2011

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 21–30 of 259 samples, newest first — collected September 26, 2023 to January 10, 2024. The summary above covers all 259.

31 results from the 10 samples listed here: 11 detected, 20 not detected. Across the whole record it is 330 of 1,445. 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 5 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 Duncan Hill Water Supply, every result from 21 to 30 of 259 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 10, 2024 12:15
Sampling point
TF103 Treatment Facility TF103
Sample type
Routine
Lab sample
NI-240111-006
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 10, 2024 12:15, sampling point TF103 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 10, 2024 12:15, sampling point TF103 Nitrate 1040 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 10, 2024 12:15, sampling point TF103 Nitrite 1041 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Collected
Jan 10, 2024 12:25
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-240111-005
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 10, 2024 12:25, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 10, 2024 12:25, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
0.0421 mg/l , sample collected Jan 10, 2024 12:25, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Collected
Nov 1, 2023 15:10
Sampling point
TF103 Treatment Facility TF103
Sample type
Routine
Lab sample
IN-231102-015
Laboratory
MSDH Lab
0.0026 mg/l , sample collected Nov 1, 2023 15:10, sampling point TF103 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
0.142 mg/l , sample collected Nov 1, 2023 15:10, sampling point TF103 Barium 1010 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 1, 2023 15:10, sampling point TF103 Cadmium 1015 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 1, 2023 15:10, sampling point TF103 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
0.263 mg/l , sample collected Nov 1, 2023 15:10, sampling point TF103 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2023 – Dec 31, 2023
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 1, 2023 15:10, sampling point TF103 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
0.0007 mg/l , sample collected Nov 1, 2023 15:10, sampling point TF103 Nickel 1036 EPA method 200.8 Not recorded
0.0031 mg/l , sample collected Nov 1, 2023 15:10, sampling point TF103 Selenium 1045 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 1, 2023 15:10, sampling point TF103 Antimony, Total 1074 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 1, 2023 15:10, sampling point TF103 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 1, 2023 15:10, sampling point TF103 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
Collected
Oct 25, 2023 12:35
Sampling point
TF103 Treatment Facility TF103
Sample type
Routine
Lab sample
NI-231026-006
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Oct 25, 2023 12:35, sampling point TF103 Nitrate-Nitrite 1038 EPA method QC10107041C Oct 1, 2023 – Dec 31, 2023
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Oct 25, 2023 12:35, sampling point TF103 Nitrate 1040 EPA method QC10107041C Oct 1, 2023 – Dec 31, 2023
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Oct 25, 2023 12:35, sampling point TF103 Nitrite 1041 EPA method QC10107041C Oct 1, 2023 – Dec 31, 2023
Collected
Oct 16, 2023 12:45
Sampling point
TF103 Treatment Facility TF103
Sample type
Routine
Lab sample
CN-231017-005
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Oct 16, 2023 12:45, sampling point TF103 Cyanide 1024 EPA method QC10204001X Oct 1, 2023 – Dec 31, 2023
Collected
Sep 26, 2023 05:25
Sampling point
LC0010 Location withheld
Sample type
Routine
Lab sample
PB-230927-095
Laboratory
MSDH Lab
0.053 mg/l , sample collected Sep 26, 2023 05:25, sampling point LC0010 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2023 05:25, sampling point LC0010 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Sep 26, 2023 06:15
Sampling point
LC0004 Location withheld
Sample type
Routine
Lab sample
PB-230927-094
Laboratory
MSDH Lab
0.0517 mg/l , sample collected Sep 26, 2023 06:15, sampling point LC0004 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2023 06:15, sampling point LC0004 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Sep 26, 2023 05:50
Sampling point
LC0008 Location withheld
Sample type
Routine
Lab sample
PB-230927-096
Laboratory
MSDH Lab
0.0173 mg/l , sample collected Sep 26, 2023 05:50, sampling point LC0008 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2023 05:50, sampling point LC0008 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Sep 26, 2023 06:20
Sampling point
LC0001 Location withheld
Sample type
Routine
Lab sample
PB-230927-093
Laboratory
MSDH Lab
0.0557 mg/l , sample collected Sep 26, 2023 06:20, sampling point LC0001 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2023 06:20, sampling point LC0001 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Sep 26, 2023 06:10
Sampling point
LC0009 Location withheld
Sample type
Routine
Lab sample
PB-230927-092
Laboratory
MSDH Lab
0.0764 mg/l , sample collected Sep 26, 2023 06:10, sampling point LC0009 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2023 06:10, sampling point LC0009 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025

Routine (10).