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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

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.

Every analyte ever detected for Dennis Water Association, 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 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 191–200 of 232 samples, newest first — collected September 18, 2007 to March 1, 2010. The summary above covers all 232.

31 results from the 10 samples listed here: 14 detected, 17 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.

Chemical and radiological sample results for Dennis Water Association, every result from 191 to 200 of 232 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
Mar 1, 2010
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
100302-072IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 1, 2010, sampling point TF080 Arsenic 1005 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.0136 mg/l , sample collected Mar 1, 2010, sampling point TF080 Barium 1010 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Mar 1, 2010, sampling point TF080 Cadmium 1015 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 1, 2010, sampling point TF080 Chromium 1020 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 1, 2010, sampling point TF080 Fluoride 1025 EPA method 380-75WE Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0002 mg/l Minimum Reporting Level , sample collected Mar 1, 2010, sampling point TF080 Mercury 1035 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 1, 2010, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
0.0024 mg/l , sample collected Mar 1, 2010, sampling point TF080 Selenium 1045 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 1, 2010, sampling point TF080 Antimony, Total 1074 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Mar 1, 2010, sampling point TF080 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 1, 2010, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
Jun 1, 2009
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
090602-001NI
Laboratory
MSDH Lab
0.87 mg/l , sample collected Jun 1, 2009, sampling point TF080 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2009 – Dec 31, 2009
0.87 mg/l , sample collected Jun 1, 2009, sampling point TF080 Nitrate 1040 EPA method 353.2 Jan 1, 2009 – Dec 31, 2009
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jun 1, 2009, sampling point TF080 Nitrite 1041 EPA method 353.2 Jan 1, 2009 – Dec 31, 2009
Collected
Jul 28, 2008
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
080729-018NI
Laboratory
MSDH Lab
0.95 mg/l , sample collected Jul 28, 2008, sampling point TF080 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2008 – Dec 31, 2008
0.95 mg/l , sample collected Jul 28, 2008, sampling point TF080 Nitrate 1040 EPA method 353.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jul 28, 2008, sampling point TF080 Nitrite 1041 EPA method 353.2 Jan 1, 2008 – Dec 31, 2008
Collected
Sep 18, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070920-395PB
Laboratory
MSDH Lab
0.004 mg/l , sample collected Sep 18, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.0008 mg/l , sample collected Sep 18, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Collected
Sep 18, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070920-146PB
Laboratory
MSDH Lab
0.0027 mg/l , sample collected Sep 18, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Collected
Sep 18, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070919-425PB
Laboratory
MSDH Lab
0.0033 mg/l , sample collected Sep 18, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Collected
Sep 18, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070919-424PB
Laboratory
MSDH Lab
0.0031 mg/l , sample collected Sep 18, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Collected
Sep 18, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070919-423PB
Laboratory
MSDH Lab
0.002 mg/l , sample collected Sep 18, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Collected
Sep 18, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070919-422PB
Laboratory
MSDH Lab
0.004 mg/l , sample collected Sep 18, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Collected
Sep 18, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070919-421PB
Laboratory
MSDH Lab
0.0024 mg/l , sample collected Sep 18, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 18, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007

Routine (10).