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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 221–230 of 259 samples, newest first — collected June 4, 1996 to July 2, 2002. The summary above covers all 259.

38 results from the 10 samples listed here: 18 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.

Chemical and radiological sample results for Duncan Hill Water Supply, every result from 221 to 230 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
Jul 2, 2002
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
020703-008IN
Laboratory
MSDH Lab
0.002 mg/l , sample collected Jul 2, 2002, sampling point TF102 Arsenic 1005 EPA method 200.8 Not recorded
0.185 mg/l , sample collected Jul 2, 2002, sampling point TF102 Barium 1010 EPA method 200.8 Not recorded
Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Jul 2, 2002, sampling point TF102 Cadmium 1015 EPA method 200.8 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 2, 2002, sampling point TF102 Chromium 1020 EPA method 200.8 Not recorded
0.21 mg/l , sample collected Jul 2, 2002, sampling point TF102 Fluoride 1025 EPA method 300.0 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 2, 2002, sampling point TF102 Mercury 1035 EPA method 200.8 Not recorded
0.001 mg/l , sample collected Jul 2, 2002, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
0.007 mg/l , sample collected Jul 2, 2002, sampling point TF102 Selenium 1045 EPA method 200.8 Not recorded
Not detected below 2.5 mg/l Minimum Reporting Level , sample collected Jul 2, 2002, sampling point TF102 Sulfate 1055 EPA method 300.0 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 2, 2002, sampling point TF102 Antimony, Total 1074 EPA method 200.8 Not recorded
Not detected below 0.0003 mg/l Minimum Reporting Level , sample collected Jul 2, 2002, sampling point TF102 Beryllium, Total 1075 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 2, 2002, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Not recorded
Collected
Jul 2, 2002
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
020703-007IN
Laboratory
MSDH Lab
0.002 mg/l , sample collected Jul 2, 2002, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
0.115 mg/l , sample collected Jul 2, 2002, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Jul 2, 2002, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 2, 2002, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
0.297 mg/l , sample collected Jul 2, 2002, sampling point TF101 Fluoride 1025 EPA method 300.0 Jan 1, 2002 – Dec 31, 2004
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 2, 2002, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
0.001 mg/l , sample collected Jul 2, 2002, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
0.006 mg/l , sample collected Jul 2, 2002, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Not detected below 2.5 mg/l Minimum Reporting Level , sample collected Jul 2, 2002, sampling point TF101 Sulfate 1055 EPA method 300.0 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 2, 2002, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Not detected below 0.0003 mg/l Minimum Reporting Level , sample collected Jul 2, 2002, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 2, 2002, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Collected
Jan 22, 2002
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
020123-031CN
Laboratory
MSDH Lab
Not detected below 0.01 mg/l Minimum Reporting Level , sample collected Jan 22, 2002, sampling point TF102 Cyanide 1024 EPA method 335.4 Jan 1, 2002 – Dec 31, 2004
Collected
Jan 22, 2002
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
020123-030CN
Laboratory
MSDH Lab
Not detected below 0.01 mg/l Minimum Reporting Level , sample collected Jan 22, 2002, sampling point TF101 Cyanide 1024 EPA method 335.4 Jan 1, 2002 – Dec 31, 2004
Collected
Sep 19, 2000
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
000920-158L
Laboratory
MSDH Lab
0.063 mg/l , sample collected Sep 19, 2000, sampling point DS000 Copper, Free 1022 Not recorded
0.002 mg/l , sample collected Sep 19, 2000, sampling point DS000 Lead 1030 Not recorded
Collected
Sep 19, 2000
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
000920-157L
Laboratory
MSDH Lab
0.009 mg/l , sample collected Sep 19, 2000, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Sep 19, 2000, sampling point DS000 Lead 1030 Not recorded
Collected
Sep 19, 2000
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
000920-156L
Laboratory
MSDH Lab
0.048 mg/l , sample collected Sep 19, 2000, sampling point DS000 Copper, Free 1022 Not recorded
0.004 mg/l , sample collected Sep 19, 2000, sampling point DS000 Lead 1030 Not recorded
Collected
Sep 19, 2000
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
000920-155L
Laboratory
MSDH Lab
0.056 mg/l , sample collected Sep 19, 2000, sampling point DS000 Copper, Free 1022 Not recorded
0.001 mg/l , sample collected Sep 19, 2000, sampling point DS000 Lead 1030 Not recorded
Collected
Sep 19, 2000
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
000920-154L
Laboratory
MSDH Lab
0.125 mg/l , sample collected Sep 19, 2000, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Sep 19, 2000, sampling point DS000 Lead 1030 Not recorded
Collected
Jun 4, 1996
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
960605-102L
Laboratory
MSDH Lab
Not detected below 0.02 mg/l Method Detection Limit , sample collected Jun 4, 1996, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Jun 4, 1996, sampling point DS000 Lead 1030 Not recorded

Routine (10).