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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 21–30 of 232 samples, newest first — collected March 29, 2023 to July 8, 2024. The summary above covers all 232.

52 results from the 10 samples listed here: 3 detected, 49 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.

We withheld the location of 2 sampling points below. The location on record identifies a private home, and we do not publish those. That is our decision, not the agency’s. The sampling point, its type and every result taken there are published unchanged.

Chemical and radiological sample results for Dennis Water Association, every result from 21 to 30 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
Jul 8, 2024 13:20
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
HA-240709-004
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 8, 2024 13:20, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2024 – Dec 31, 2024
Collected
Jul 8, 2024 13:20
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-240709-004
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 8, 2024 13:20, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2024 – Dec 31, 2024
Collected
Jun 20, 2024 09:30
Sampling point
SM2 Location withheld
Sample type
Routine
Lab sample
810-109136-2
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM2 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM2 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM2 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM2 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM2 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM2 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Apr 1, 2024 – Jun 30, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM2 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM2 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM2 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM2 Dibromochloromethane 2944 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM2 TTHM 2950 EPA method 524.2 Apr 1, 2024 – Jun 30, 2024
Collected
Jun 20, 2024 09:30
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
810-109136-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Apr 1, 2024 – Jun 30, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM1 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM1 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM1 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM1 Dibromochloromethane 2944 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 20, 2024 09:30, sampling point SM1 TTHM 2950 EPA method 524.2 Apr 1, 2024 – Jun 30, 2024
Collected
Apr 17, 2024 14:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
NI-240418-057
Laboratory
MSDH Lab
0.59 mg/l , sample collected Apr 17, 2024 14:00, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
0.59 mg/l , sample collected Apr 17, 2024 14:00, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 17, 2024 14:00, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Collected
Mar 26, 2024 09:00
Sampling point
SM2 Location withheld
Sample type
Routine
Lab sample
810-98566-2
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:00, sampling point SM2 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:00, sampling point SM2 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:00, sampling point SM2 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:00, sampling point SM2 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:00, sampling point SM2 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:00, sampling point SM2 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2024 – Mar 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:00, sampling point SM2 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:00, sampling point SM2 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:00, sampling point SM2 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:00, sampling point SM2 Dibromochloromethane 2944 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:00, sampling point SM2 TTHM 2950 EPA method 524.2 Jan 1, 2024 – Mar 31, 2024
Collected
Mar 26, 2024 09:30
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
810-98566-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:30, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:30, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:30, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:30, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:30, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:30, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2024 – Mar 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:30, sampling point SM1 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:30, sampling point SM1 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:30, sampling point SM1 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:30, sampling point SM1 Dibromochloromethane 2944 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 26, 2024 09:30, sampling point SM1 TTHM 2950 EPA method 524.2 Jan 1, 2024 – Mar 31, 2024
Collected
Sep 12, 2023 13:45
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-230913-008
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 12, 2023 13:45, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Collected
Sep 12, 2023 13:45
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
HA-230913-008
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 12, 2023 13:45, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2023 – Dec 31, 2023
Collected
Mar 29, 2023 13:45
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
NA-230330-018
Laboratory
MSDH Lab
1.42 mg/l , sample collected Mar 29, 2023 13:45, sampling point TF080 Sodium 1052 EPA method 200.7 Not recorded

Routine (10).