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
MS0710003 , Dennis Water Association
14 of the 103 analytes this system has been tested for have been detected at least once, across 232 samples on record.
The other 89 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 232 samples on record, detections range from October 29, 2003 to July 29, 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 | 87 of 89 results | Sep 18, 2007 | Sep 23, 2025 |
| Lead 1030 | Inorganic Chemical | 28 of 89 results | Sep 18, 2007 | Sep 23, 2025 |
| Nitrate-Nitrite 1038 | Inorganic Chemical | 21 of 21 results | Jun 14, 2004 | Jul 29, 2026 |
| Nitrate 1040 | Inorganic Chemical | 21 of 21 results | Jun 14, 2004 | Jul 29, 2026 |
| Barium 1010 | Inorganic Chemical | 10 of 10 results | Oct 29, 2003 | Apr 1, 2025 |
| Nickel 1036 | Inorganic Chemical | 6 of 10 results | Oct 29, 2003 | Apr 1, 2025 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 5 of 19 results | Sep 10, 2007 | Oct 19, 2022 |
| Gross Alpha Particle Activity 4109 | Radionuclide | 4 of 4 results | Sep 19, 2011 | Apr 2, 2012 |
| Sodium 1052 | Inorganic Chemical | 2 of 3 results | Sep 25, 2019 | Mar 29, 2023 |
| TTHM 2950 | Organic Chemical | 2 of 18 results | Sep 10, 2007 | Jul 12, 2010 |
| Chromium 1020 | Inorganic Chemical | 1 of 10 results | Apr 1, 2025 | Apr 1, 2025 |
| Monobromoacetic Acid 2453 | Organic Chemical | 1 of 13 results | Oct 28, 2020 | Oct 28, 2020 |
| Diquat 2032 | Organic Chemical | 1 of 8 results | Aug 16, 2010 | Aug 16, 2010 |
| Selenium 1045 | Inorganic Chemical | 1 of 10 results | Mar 1, 2010 | Mar 1, 2010 |
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 141–150 of 232 samples, newest first — collected November 29, 2010 to January 24, 2012. The summary above covers all 232.
21 results from the 10 samples listed here: 5 detected, 16 not detected. Across the whole record it is 190 of 920. 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 |
|---|---|---|
|
||
| Not detected below 0.8 pci/l Minimum Reporting Level , sample collected Jan 24, 2012 14:30, sampling point TF080 | Combined Radium (-226 & -228) 4010 | Not recorded |
| Not detected below 0.3 pci/l Minimum Reporting Level , sample collected Jan 24, 2012 14:30, sampling point TF080 | Radium-226 4020 EPA method 903.1 | Jan 1, 2012 – Mar 31, 2012 |
| Not detected below 0.8 pci/l Minimum Reporting Level , sample collected Jan 24, 2012 14:30, sampling point TF080 | Radium-228 4030 EPA method 904 | Jan 1, 2012 – Mar 31, 2012 |
| 0.7 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 24, 2012 14:30, sampling point TF080 | Gross Alpha Particle Activity 4109 EPA method 00-02 | Jan 1, 2012 – Mar 31, 2012 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 24, 2012 14:30, sampling point TF080 | Combined Uranium 4006 EPA method 200.8 | Jan 1, 2012 – Mar 31, 2012 |
|
||
| Not detected below 0.8 ug/l Minimum Reporting Level , sample collected Dec 14, 2011 02:00, sampling point TF080 | Diquat 2032 EPA method 549.2 | Not recorded |
|
||
| Not detected below 0.8 pci/l Minimum Reporting Level , sample collected Dec 6, 2011 14:00, sampling point TF080 | Combined Radium (-226 & -228) 4010 | Not recorded |
| Not detected below 0.3 pci/l Minimum Reporting Level , sample collected Dec 6, 2011 14:00, sampling point TF080 | Radium-226 4020 EPA method 903.1 | Oct 1, 2011 – Dec 31, 2011 |
| Not detected below 0.8 pci/l Minimum Reporting Level , sample collected Dec 6, 2011 14:00, sampling point TF080 | Radium-228 4030 EPA method 904 | Oct 1, 2011 – Dec 31, 2011 |
| 0.7 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 6, 2011 14:00, sampling point TF080 | Gross Alpha Particle Activity 4109 EPA method 00-02 | Oct 1, 2011 – Dec 31, 2011 |
|
||
| Not detected below 0.8 pci/l Minimum Reporting Level , sample collected Sep 19, 2011 14:30, sampling point TF080 | Combined Radium (-226 & -228) 4010 | Not recorded |
| Not detected below 0.3 pci/l Minimum Reporting Level , sample collected Sep 19, 2011 14:30, sampling point TF080 | Radium-226 4020 EPA method 903.1 | Jul 1, 2011 – Sep 30, 2011 |
| Not detected below 0.8 pci/l Minimum Reporting Level , sample collected Sep 19, 2011 14:30, sampling point TF080 | Radium-228 4030 EPA method 904 | Jul 1, 2011 – Sep 30, 2011 |
| 0.7 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 Sep 19, 2011 14:30, sampling point TF080 | Gross Alpha Particle Activity 4109 EPA method 00-02 | Jul 1, 2011 – Sep 30, 2011 |
|
||
| Not detected below 0.8 ug/l Minimum Reporting Level , sample collected Jul 18, 2011 03:00, sampling point TF080 | Diquat 2032 EPA method 549.2 | Not recorded |
|
||
| Not detected below 0.8 ug/l Minimum Reporting Level , sample collected Jun 20, 2011, sampling point TF080 | Diquat 2032 EPA method 549.2 | Not recorded |
|
||
| 0.82 mg/l , sample collected Apr 4, 2011, sampling point TF080 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2011 – Dec 31, 2011 |
| 0.81 mg/l , sample collected Apr 4, 2011, sampling point TF080 | Nitrate 1040 EPA method 353.2 | Jan 1, 2011 – Dec 31, 2011 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 4, 2011, sampling point TF080 | Nitrite 1041 EPA method 353.2 | Jan 1, 2011 – Dec 31, 2011 |
|
||
| Not detected below 0.8 ug/l Minimum Reporting Level , sample collected Mar 28, 2011, sampling point TF080 | Diquat 2032 EPA method 549.2 | Not recorded |
|
||
| Not detected below 0.025 ug/l Minimum Reporting Level , sample collected Nov 29, 2010, sampling point TF080 | Benzo(a)pyrene 2306 EPA method 550.1 | Not recorded |
-
- Collected
- Jan 24, 2012 14:30
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 120125-001
- Laboratory
- Radiation Safety Engineering
-
Combined Radium (-226 & -228) 4010
- Result
- Not detected below 0.8 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- Not detected below 0.3 pci/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2012 – Mar 31, 2012
-
Radium-228 4030 EPA method 904
- Result
- Not detected below 0.8 pci/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2012 – Mar 31, 2012
-
Gross Alpha Particle Activity 4109 EPA method 00-02
- Result
- 0.7 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, 2012 – Mar 31, 2012
-
- Collected
- Jan 24, 2012 14:30
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 120125-001RU
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2012 – Mar 31, 2012
-
Combined Uranium 4006 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Dec 14, 2011 02:00
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 111215-001S9
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Diquat 2032 EPA method 549.2
- Result
- Not detected below 0.8 ug/l Minimum Reporting Level
-
- Collected
- Dec 6, 2011 14:00
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 111207-019
- Laboratory
- Radiation Safety Engineering
-
Combined Radium (-226 & -228) 4010
- Result
- Not detected below 0.8 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- Not detected below 0.3 pci/l Minimum Reporting Level
- Monitoring period
- Oct 1, 2011 – Dec 31, 2011
-
Radium-228 4030 EPA method 904
- Result
- Not detected below 0.8 pci/l Minimum Reporting Level
- Monitoring period
- Oct 1, 2011 – Dec 31, 2011
-
Gross Alpha Particle Activity 4109 EPA method 00-02
- Result
- 0.7 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, 2011 – Dec 31, 2011
-
- Collected
- Sep 19, 2011 14:30
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 110920-001
- Laboratory
- Radiation Safety Engineering
-
Combined Radium (-226 & -228) 4010
- Result
- Not detected below 0.8 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- Not detected below 0.3 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2011 – Sep 30, 2011
-
Radium-228 4030 EPA method 904
- Result
- Not detected below 0.8 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2011 – Sep 30, 2011
-
Gross Alpha Particle Activity 4109 EPA method 00-02
- Result
- 0.7 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
- Jul 1, 2011 – Sep 30, 2011
-
- Collected
- Jul 18, 2011 03:00
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 110719-001S9
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Diquat 2032 EPA method 549.2
- Result
- Not detected below 0.8 ug/l Minimum Reporting Level
-
- Collected
- Jun 20, 2011
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 110621-001S9
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Diquat 2032 EPA method 549.2
- Result
- Not detected below 0.8 ug/l Minimum Reporting Level
-
- Collected
- Apr 4, 2011
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 110405-089NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2011 – Dec 31, 2011
-
Nitrate-Nitrite 1038 EPA method 353.2
- Result
- 0.82 mg/l
-
Nitrate 1040 EPA method 353.2
- Result
- 0.81 mg/l
-
Nitrite 1041 EPA method 353.2
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Mar 28, 2011
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 110329-001S9
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Diquat 2032 EPA method 549.2
- Result
- Not detected below 0.8 ug/l Minimum Reporting Level
-
- Collected
- Nov 29, 2010
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 101130-010SA
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Benzo(a)pyrene 2306 EPA method 550.1
- Result
- Not detected below 0.025 ug/l Minimum Reporting Level
Routine (10).