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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 51–60 of 232 samples, newest first — collected August 6, 2019 to May 5, 2021. The summary above covers all 232.

25 results from the 10 samples listed here: 8 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 51 to 60 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
May 5, 2021 14:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
NI-210506-003
Laboratory
MSDH Lab
0.864 mg/l , sample collected May 5, 2021 14:00, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021
0.864 mg/l , sample collected May 5, 2021 14:00, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected May 5, 2021 14:00, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2021 – Dec 31, 2021
Collected
Oct 28, 2020 13:45
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
201029-005HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Oct 28, 2020 13:45, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Oct 28, 2020 13:45, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Oct 28, 2020 13:45, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
0.004 mg/l , sample collected Oct 28, 2020 13:45, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Oct 28, 2020 13:45, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.004 mg/l , sample collected Oct 28, 2020 13:45, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Not recorded
Collected
May 20, 2020 15:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
200521-014NI
Laboratory
MSDH Lab
0.85 mg/l , sample collected May 20, 2020 15:00, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2020 – Dec 31, 2020
0.85 mg/l , sample collected May 20, 2020 15:00, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2020 – Dec 31, 2020
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected May 20, 2020 15:00, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2020 – Dec 31, 2020
Collected
Dec 3, 2019 13:10
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
191204-001S7
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 3, 2019 13:10, sampling point TF080 Oxamyl 2036 EPA method 531.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 3, 2019 13:10, sampling point TF080 Aldicarb Sulfoxide 2043 EPA method 531.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 3, 2019 13:10, sampling point TF080 Aldicarb Sulfone 2044 EPA method 531.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 3, 2019 13:10, sampling point TF080 Carbofuran 2046 EPA method 531.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 3, 2019 13:10, sampling point TF080 Aldicarb 2047 EPA method 531.2 Not recorded
Collected
Nov 6, 2019 09:30
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
4478761
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 0.4 ug/l Minimum Reporting Level , sample collected Nov 6, 2019 09:30, sampling point TF080 Diquat 2032 EPA method 549.2 Not recorded
Collected
Sep 25, 2019 14:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
680-175057-8
Laboratory
Test America-Savannah
1100 ug/l , sample collected Sep 25, 2019 14:00, sampling point TF080 Sodium 1052 EPA method 200.7 Not recorded
Collected
Sep 25, 2019
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
041923858-0001
Laboratory
Emsl Analytical, Inc.
Not detected below 0.18 mfl Minimum Reporting Level , sample collected Sep 25, 2019, sampling point DS000 Asbestos 1094 EPA method 100.2 Not recorded
Collected
Sep 25, 2019 13:50
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
190926-001SC
Laboratory
MSDH Lab
Not detected below 6 ug/l Minimum Reporting Level , sample collected Sep 25, 2019 13:50, sampling point TF080 Glyphosate 2034 EPA method 547 Not recorded
Collected
Sep 10, 2019 14:25
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
190911-002S1
Laboratory
MSDH Lab
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Sep 10, 2019 14:25, 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 10, 2019 14:25, sampling point TF080 Ethylene Dibromide 2946 EPA method 504.1 Not recorded
Collected
Aug 6, 2019 08:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
190807-053PB
Laboratory
MSDH Lab
0.3613 mg/l , sample collected Aug 6, 2019 08:30, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 6, 2019 08:30, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019

Routine (10).