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.
| 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 121–130 of 259 samples, newest first — collected July 10, 2012 to June 10, 2014. The summary above covers all 259.
41 results from the 10 samples listed here: 21 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.
| Result | Analyte | Monitoring period |
|---|---|---|
|
||
| 0.2365 mg/l , sample collected Jun 10, 2014 06:00, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2012 – Dec 31, 2014 |
| 0.0024 mg/l , sample collected Jun 10, 2014 06:00, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2012 – Dec 31, 2014 |
|
||
| 0.0079 mg/l , sample collected Jun 10, 2014 07:25, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2012 – Dec 31, 2014 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 10, 2014 07:25, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2012 – Dec 31, 2014 |
|
||
| 0.0012 mg/l , sample collected May 5, 2014 12:05, sampling point TF102 | Arsenic 1005 EPA method 200.8 | Jan 1, 2014 – Dec 31, 2016 |
| 0.1476 mg/l , sample collected May 5, 2014 12:05, sampling point TF102 | Barium 1010 EPA method 200.8 | Jan 1, 2014 – Dec 31, 2016 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 5, 2014 12:05, sampling point TF102 | Cadmium 1015 EPA method 200.8 | Jan 1, 2014 – Dec 31, 2016 |
| 0.0045 mg/l , sample collected May 5, 2014 12:05, sampling point TF102 | Chromium 1020 EPA method 200.8 | Jan 1, 2014 – Dec 31, 2016 |
| 0.191 mg/l , sample collected May 5, 2014 12:05, sampling point TF102 | Fluoride 1025 EPA method 300.0 | Jan 1, 2014 – Dec 31, 2016 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 5, 2014 12:05, sampling point TF102 | Mercury 1035 EPA method 200.8 | Jan 1, 2014 – Dec 31, 2016 |
| 0.0007 mg/l , sample collected May 5, 2014 12:05, sampling point TF102 | Nickel 1036 EPA method 200.8 | Not recorded |
| 0.0039 mg/l , sample collected May 5, 2014 12:05, sampling point TF102 | Selenium 1045 EPA method 200.8 | Jan 1, 2014 – Dec 31, 2016 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 5, 2014 12:05, sampling point TF102 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2014 – Dec 31, 2016 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 5, 2014 12:05, sampling point TF102 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2014 – Dec 31, 2016 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 5, 2014 12:05, sampling point TF102 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2014 – Dec 31, 2016 |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 21, 2014 01:25, sampling point TF102 | Nitrate-Nitrite 1038 EPA method QC10107041C | Jan 1, 2014 – Dec 31, 2014 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 21, 2014 01:25, sampling point TF102 | Nitrate 1040 EPA method QC10107041C | Jan 1, 2014 – Dec 31, 2014 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 21, 2014 01:25, sampling point TF102 | Nitrite 1041 EPA method QC10107041C | Jan 1, 2014 – Dec 31, 2014 |
|
||
| 0.16 mg/l , sample collected Mar 4, 2013 01:35, sampling point TF102 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2013 – Dec 31, 2013 |
| 0.16 mg/l , sample collected Mar 4, 2013 01:35, sampling point TF102 | Nitrate 1040 EPA method 353.2 | Jan 1, 2013 – Dec 31, 2013 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 4, 2013 01:35, sampling point TF102 | Nitrite 1041 EPA method 353.2 | Jan 1, 2013 – Dec 31, 2013 |
|
||
| 9 pci/l , sample collected Jan 28, 2013 10:44, sampling point TF101 | Combined Radium (-226 & -228) 4010 | Not recorded |
| 9 pci/l , sample collected Jan 28, 2013 10:44, sampling point TF101 | Radium-226 4020 EPA method 903.1 | Jan 1, 2013 – Mar 31, 2013 |
| Not detected below 0.29 pci/l Minimum Reporting Level , sample collected Jan 28, 2013 10:44, sampling point TF101 | Radium-228 4030 EPA method 904 | Jan 1, 2013 – Mar 31, 2013 |
| 22.6 pci/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Jan 28, 2013 10:44, sampling point TF101 | Gross Alpha Particle Activity 4109 EPA method 00-02 | Jan 1, 2013 – Mar 31, 2013 |
|
||
| 9.8 pci/l , sample collected Dec 12, 2012 11:04, sampling point TF101 | Combined Radium (-226 & -228) 4010 | Not recorded |
| 9.8 pci/l , sample collected Dec 12, 2012 11:04, sampling point TF101 | Radium-226 4020 EPA method 903.1 | Oct 1, 2012 – Dec 31, 2012 |
| Not detected below 0.26 pci/l Minimum Reporting Level , sample collected Dec 12, 2012 11:04, sampling point TF101 | Radium-228 4030 EPA method 904 | Oct 1, 2012 – Dec 31, 2012 |
| 18.4 pci/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Dec 12, 2012 11:04, sampling point TF101 | Gross Alpha Particle Activity 4109 EPA method 00-02 | Oct 1, 2012 – Dec 31, 2012 |
|
||
| Not detected below 0.31 pci/l Minimum Reporting Level , sample collected Jul 11, 2012 12:59, sampling point TF102 | Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 | Not recorded |
| Not detected below 0.31 pci/l Minimum Reporting Level , sample collected Jul 11, 2012 12:59, sampling point TF102 | Combined Radium (-226 & -228) 4010 | Not recorded |
| Not detected below 0.177 pci/l Minimum Reporting Level , sample collected Jul 11, 2012 12:59, sampling point TF102 | Radium-226 4020 EPA method 903.1 | Jul 1, 2012 – Sep 30, 2012 |
| Not detected below 0.31 pci/l Minimum Reporting Level , sample collected Jul 11, 2012 12:59, sampling point TF102 | Radium-228 4030 EPA method 904.0 | Jul 1, 2012 – Sep 30, 2012 |
|
||
| 17 pci/l , sample collected Jul 11, 2012 12:20, sampling point TF101 | Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 | Not recorded |
| 8.4 pci/l , sample collected Jul 11, 2012 12:20, sampling point TF101 | Combined Radium (-226 & -228) 4010 | Not recorded |
| 7.5 pci/l , sample collected Jul 11, 2012 12:20, sampling point TF101 | Radium-226 4020 EPA method 903.1 | Jul 1, 2012 – Sep 30, 2012 |
| 0.9 pci/l , sample collected Jul 11, 2012 12:20, sampling point TF101 | Radium-228 4030 EPA method 904.0 | Jul 1, 2012 – Sep 30, 2012 |
|
||
| Not detected below 0.31 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 14:30, sampling point TF102 | Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 | Not recorded |
| Not detected below 0.31 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 14:30, sampling point TF102 | Combined Radium (-226 & -228) 4010 | Not recorded |
| Not detected below 0.177 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 14:30, sampling point TF102 | Radium-226 4020 EPA method 903.1 | Jul 1, 2012 – Sep 30, 2012 |
| Not detected below 0.31 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 14:30, sampling point TF102 | Radium-228 4030 EPA method 904.0 | Jul 1, 2012 – Sep 30, 2012 |
-
- Collected
- Jun 10, 2014 06:00
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 140611-098PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2012 – Dec 31, 2014
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.2365 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0024 mg/l
-
- Collected
- Jun 10, 2014 07:25
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 140611-097PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2012 – Dec 31, 2014
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0079 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- May 5, 2014 12:05
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 140506-045IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- 0.0012 mg/l
- Monitoring period
- Jan 1, 2014 – Dec 31, 2016
-
Barium 1010 EPA method 200.8
- Result
- 0.1476 mg/l
- Monitoring period
- Jan 1, 2014 – Dec 31, 2016
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2014 – Dec 31, 2016
-
Chromium 1020 EPA method 200.8
- Result
- 0.0045 mg/l
- Monitoring period
- Jan 1, 2014 – Dec 31, 2016
-
Fluoride 1025 EPA method 300.0
- Result
- 0.191 mg/l
- Monitoring period
- Jan 1, 2014 – Dec 31, 2016
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2014 – Dec 31, 2016
-
Nickel 1036 EPA method 200.8
- Result
- 0.0007 mg/l
- Monitoring period
- Not recorded
-
Selenium 1045 EPA method 200.8
- Result
- 0.0039 mg/l
- Monitoring period
- Jan 1, 2014 – Dec 31, 2016
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2014 – Dec 31, 2016
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2014 – Dec 31, 2016
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2014 – Dec 31, 2016
-
- Collected
- Jan 21, 2014 01:25
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 140122-076NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2014 – Dec 31, 2014
-
Nitrate-Nitrite 1038 EPA method QC10107041C
- Result
- Not detected below 0.1 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method QC10107041C
- Result
- Not detected below 0.08 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method QC10107041C
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Mar 4, 2013 01:35
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 130305-007NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2013 – Dec 31, 2013
-
Nitrate-Nitrite 1038 EPA method 353.2
- Result
- 0.16 mg/l
-
Nitrate 1040 EPA method 353.2
- Result
- 0.16 mg/l
-
Nitrite 1041 EPA method 353.2
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Jan 28, 2013 10:44
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 201302260016
- Laboratory
- Radiation Safety Engineering
-
Combined Radium (-226 & -228) 4010
- Result
- 9 pci/l
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- 9 pci/l
- Monitoring period
- Jan 1, 2013 – Mar 31, 2013
-
Radium-228 4030 EPA method 904
- Result
- Not detected below 0.29 pci/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2013 – Mar 31, 2013
-
Gross Alpha Particle Activity 4109 EPA method 00-02
- Result
- 22.6 pci/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType.
- Monitoring period
- Jan 1, 2013 – Mar 31, 2013
-
- Collected
- Dec 12, 2012 11:04
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 201212190022
- Laboratory
- Radiation Safety Engineering
-
Combined Radium (-226 & -228) 4010
- Result
- 9.8 pci/l
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- 9.8 pci/l
- Monitoring period
- Oct 1, 2012 – Dec 31, 2012
-
Radium-228 4030 EPA method 904
- Result
- Not detected below 0.26 pci/l Minimum Reporting Level
- Monitoring period
- Oct 1, 2012 – Dec 31, 2012
-
Gross Alpha Particle Activity 4109 EPA method 00-02
- Result
- 18.4 pci/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType.
- Monitoring period
- Oct 1, 2012 – Dec 31, 2012
-
- Collected
- Jul 11, 2012 12:59
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 201211120063
- Laboratory
- Radiation Safety Engineering
-
Gross Alpha, Incl. Radon & U 4002 EPA method 00-02
- Result
- Not detected below 0.31 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Combined Radium (-226 & -228) 4010
- Result
- Not detected below 0.31 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- Not detected below 0.177 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
-
Radium-228 4030 EPA method 904.0
- Result
- Not detected below 0.31 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
-
- Collected
- Jul 11, 2012 12:20
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 201211120062
- Laboratory
- Radiation Safety Engineering
-
Gross Alpha, Incl. Radon & U 4002 EPA method 00-02
- Result
- 17 pci/l
- Monitoring period
- Not recorded
-
Combined Radium (-226 & -228) 4010
- Result
- 8.4 pci/l
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- 7.5 pci/l
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
-
Radium-228 4030 EPA method 904.0
- Result
- 0.9 pci/l
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
-
- Collected
- Jul 10, 2012 14:30
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 120711-068
- Laboratory
- Radiation Safety Engineering
-
Gross Alpha, Incl. Radon & U 4002 EPA method 00-02
- Result
- Not detected below 0.31 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Combined Radium (-226 & -228) 4010
- Result
- Not detected below 0.31 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- Not detected below 0.177 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
-
Radium-228 4030 EPA method 904.0
- Result
- Not detected below 0.31 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
Routine (10).