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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 161–170 of 232 samples, newest first — collected August 10, 2010 to September 14, 2010. The summary above covers all 232.

36 results from the 10 samples listed here: 11 detected, 25 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.

Units in this table

Diquat is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

Chemical and radiological sample results for Dennis Water Association, every result from 161 to 170 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
Sep 14, 2010
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
100915-005S1
Laboratory
MSDH Lab
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Sep 14, 2010, sampling point TF080 1,2-Dibromo-3-Chloropropane 2931 EPA method 504.1 Not recorded
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Sep 14, 2010, sampling point TF080 Ethylene Dibromide 2946 EPA method 504.1 Not recorded
Collected
Sep 14, 2010
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
100915-010S2
Laboratory
MSDH Lab
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Sep 14, 2010, sampling point TF080 DI(2-Ethylhexyl) Adipate 2035 EPA method 525.2 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Sep 14, 2010, sampling point TF080 Simazine 2037 EPA method 525.2 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Sep 14, 2010, sampling point TF080 DI(2-Ethylhexyl) Phthalate 2039 EPA method 525.2 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Sep 14, 2010, sampling point TF080 Atrazine 2050 EPA method 525.2 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Sep 14, 2010, sampling point TF080 Lasso 2051 EPA method 525.2 Not recorded
Collected
Aug 23, 2010
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
100824-009S5
Laboratory
MSDH Lab
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Aug 23, 2010, sampling point TF080 Endrin 2005 EPA method 505 Not recorded
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Aug 23, 2010, sampling point TF080 BHC-Gamma 2010 EPA method 505 Not recorded
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Aug 23, 2010, sampling point TF080 Methoxychlor 2015 EPA method 505 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 23, 2010, sampling point TF080 Toxaphene 2020 EPA method 505 Not recorded
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Aug 23, 2010, sampling point TF080 Hexachlorocyclopentadiene 2042 EPA method 505 Not recorded
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Aug 23, 2010, sampling point TF080 Heptachlor 2065 EPA method 505 Not recorded
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Aug 23, 2010, sampling point TF080 Heptachlor Epoxide 2067 EPA method 505 Not recorded
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Aug 23, 2010, sampling point TF080 Hexachlorobenzene 2274 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Aug 23, 2010, sampling point TF080 Aroclor 1016 2388 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Aug 23, 2010, sampling point TF080 Aroclor 1221 2390 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Aug 23, 2010, sampling point TF080 Aroclor 1232 2392 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Aug 23, 2010, sampling point TF080 Aroclor 1242 2394 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Aug 23, 2010, sampling point TF080 Aroclor 1248 2396 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Aug 23, 2010, sampling point TF080 Aroclor 1254 2398 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Aug 23, 2010, sampling point TF080 Aroclor 1260 2400 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Aug 23, 2010, sampling point TF080 Chlordane 2959 EPA method 505 Not recorded
Collected
Aug 16, 2010
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
100817-015S9
Laboratory
MSDH Lab
1.04 ug/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 Aug 16, 2010, sampling point TF080 Diquat 2032 EPA method 549.2 Not recorded
Collected
Aug 10, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100811-165PB
Laboratory
MSDH Lab
0.0118 mg/l , sample collected Aug 10, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.0005 mg/l , sample collected Aug 10, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
Aug 10, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100811-164PB
Laboratory
MSDH Lab
0.096 mg/l , sample collected Aug 10, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 10, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
Aug 10, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100811-163PB
Laboratory
MSDH Lab
0.0349 mg/l , sample collected Aug 10, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.002 mg/l , sample collected Aug 10, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
Aug 10, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100811-162PB
Laboratory
MSDH Lab
0.1224 mg/l , sample collected Aug 10, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 10, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
Aug 10, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100811-161PB
Laboratory
MSDH Lab
0.0292 mg/l , sample collected Aug 10, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.0006 mg/l , sample collected Aug 10, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
Aug 10, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100811-160PB
Laboratory
MSDH Lab
0.065 mg/l , sample collected Aug 10, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.0009 mg/l , sample collected Aug 10, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010

Routine (10).