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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 91–100 of 232 samples, newest first — collected November 12, 2014 to August 24, 2016. The summary above covers all 232.

37 results from the 10 samples listed here: 8 detected, 29 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 91 to 100 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
Aug 24, 2016 01:15
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
160825-018TH
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 24, 2016 01:15, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 24, 2016 01:15, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 24, 2016 01:15, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 24, 2016 01:15, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
Not detected below 4 ug/l Minimum Reporting Level , sample collected Aug 24, 2016 01:15, sampling point MRT000 TTHM 2950 Jan 1, 2014 – Dec 31, 2016
Collected
Aug 23, 2016 22:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
160825-067PB
Laboratory
MSDH Lab
0.5471 mg/l , sample collected Aug 23, 2016 22:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
0.0015 mg/l , sample collected Aug 23, 2016 22:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Collected
Jul 21, 2016 11:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
201607220203
Laboratory
Eea Laboratories
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 21, 2016 11:00, sampling point TF080 Dalapon 2031 EPA method 515.4 Not recorded
Not detected below 5 ug/l Minimum Reporting Level , sample collected Jul 21, 2016 11:00, sampling point TF080 Endothall 2033 EPA method 548.1 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Jul 21, 2016 11:00, sampling point TF080 Picloram 2040 EPA method 515.4 Not recorded
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Jul 21, 2016 11:00, sampling point TF080 Dinoseb 2041 EPA method 515.4 Not recorded
Not detected below 0.005 ng/l Minimum Reporting Level , sample collected Jul 21, 2016 11:00, sampling point TF080 2,3,7,8-TCDD 2063 EPA method 1613B Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Jul 21, 2016 11:00, sampling point TF080 2,4-D 2105 EPA method 515.4 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Jul 21, 2016 11:00, sampling point TF080 2,4-DB 2106 EPA method 515.4 Not recorded
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Jul 21, 2016 11:00, sampling point TF080 2,4,5-TP 2110 EPA method 515.4 Not recorded
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Jul 21, 2016 11:00, sampling point TF080 2,4,5-T 2111 EPA method 515.4 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 21, 2016 11:00, sampling point TF080 Dichlorprop 2206 EPA method 515.4 Not recorded
Not detected below 0.04 ug/l Minimum Reporting Level , sample collected Jul 21, 2016 11:00, sampling point TF080 Pentachlorophenol 2326 EPA method 515.4 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Jul 21, 2016 11:00, sampling point TF080 Dicamba 2440 EPA method 515.4 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 21, 2016 11:00, sampling point TF080 Bentazon 2625 EPA method 515.4 Not recorded
Collected
Jul 19, 2016 02:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
160720-016SC
Laboratory
MSDH Lab
Not detected below 6 ug/l Minimum Reporting Level , sample collected Jul 19, 2016 02:00, sampling point TF080 Glyphosate 2034 EPA method 547 Not recorded
Collected
Jun 28, 2016 02:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
160629-003CN
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Jun 28, 2016 02:00, sampling point TF080 Cyanide 1024 EPA method QC10204001X Jan 1, 2014 – Dec 31, 2016
Collected
May 31, 2016 14:30
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
160601-043NI
Laboratory
MSDH Lab
0.82 mg/l , sample collected May 31, 2016 14:30, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2016 – Dec 31, 2016
0.82 mg/l , sample collected May 31, 2016 14:30, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2016 – Dec 31, 2016
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected May 31, 2016 14:30, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2016 – Dec 31, 2016
Collected
Apr 26, 2016 02:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
160427-005SC
Laboratory
MSDH Lab
Not detected below 6 ug/l Minimum Reporting Level , sample collected Apr 26, 2016 02:00, sampling point TF080 Glyphosate 2034 EPA method 547 Not recorded
Collected
Apr 26, 2016 02:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
160427-005S7
Laboratory
MSDH Lab
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Apr 26, 2016 02:00, sampling point TF080 Oxamyl 2036 EPA method 531.2 Not recorded
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Apr 26, 2016 02:00, sampling point TF080 Aldicarb Sulfoxide 2043 EPA method 531.2 Not recorded
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Apr 26, 2016 02:00, sampling point TF080 Aldicarb Sulfone 2044 EPA method 531.2 Not recorded
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Apr 26, 2016 02:00, sampling point TF080 Carbofuran 2046 EPA method 531.2 Not recorded
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Apr 26, 2016 02:00, sampling point TF080 Aldicarb 2047 EPA method 531.2 Not recorded
Collected
May 18, 2015 14:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
150519-036NI
Laboratory
MSDH Lab
0.7 mg/l , sample collected May 18, 2015 14:00, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2015 – Dec 31, 2015
0.7 mg/l , sample collected May 18, 2015 14:00, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2015 – Dec 31, 2015
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected May 18, 2015 14:00, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2015 – Dec 31, 2015
Collected
Nov 12, 2014 14:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
141113-017NI
Laboratory
MSDH Lab
0.71 mg/l , sample collected Nov 12, 2014 14:00, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2014 – Dec 31, 2014
0.71 mg/l , sample collected Nov 12, 2014 14:00, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2014 – Dec 31, 2014
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Nov 12, 2014 14:00, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2014 – Dec 31, 2014

Routine (10).