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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 71–80 of 232 samples, newest first — collected September 6, 2016 to July 9, 2019. The summary above covers all 232.

70 results from the 10 samples listed here: 4 detected, 66 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 71 to 80 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 9, 2019 01:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
190710-017CN
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Jul 9, 2019 01:00, sampling point TF080 Cyanide 1024 EPA method QC10204001X Jan 1, 2017 – Dec 31, 2019
Collected
May 15, 2019 03:25
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
190516-007IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 15, 2019 03:25, sampling point TF080 Arsenic 1005 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
0.014 mg/l , sample collected May 15, 2019 03:25, sampling point TF080 Barium 1010 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 15, 2019 03:25, sampling point TF080 Cadmium 1015 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 15, 2019 03:25, sampling point TF080 Chromium 1020 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected May 15, 2019 03:25, sampling point TF080 Fluoride 1025 EPA method 300.0 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 15, 2019 03:25, sampling point TF080 Mercury 1035 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 15, 2019 03:25, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 15, 2019 03:25, sampling point TF080 Selenium 1045 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 15, 2019 03:25, sampling point TF080 Antimony, Total 1074 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 15, 2019 03:25, sampling point TF080 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 15, 2019 03:25, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Collected
Apr 23, 2019 13:30
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
190424-002SC
Laboratory
MSDH Lab
Not detected below 0.6 ug/l Minimum Reporting Level , sample collected Apr 23, 2019 13:30, sampling point TF080 Glyphosate 2034 EPA method 547 Not recorded
Collected
Nov 13, 2018 12:15
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
181114-015NI
Laboratory
MSDH Lab
0.8 mg/l , sample collected Nov 13, 2018 12:15, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2018 – Dec 31, 2018
0.8 mg/l , sample collected Nov 13, 2018 12:15, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2018 – Dec 31, 2018
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Nov 13, 2018 12:15, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2018 – Dec 31, 2018
Collected
Dec 13, 2016 12:30
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
161214-077IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 13, 2016 12:30, sampling point TF080 Arsenic 1005 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
0.0132 mg/l , sample collected Dec 13, 2016 12:30, sampling point TF080 Barium 1010 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 13, 2016 12:30, sampling point TF080 Cadmium 1015 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 13, 2016 12:30, sampling point TF080 Chromium 1020 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Dec 13, 2016 12:30, sampling point TF080 Fluoride 1025 EPA method 300.0 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 13, 2016 12:30, sampling point TF080 Mercury 1035 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 13, 2016 12:30, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Dec 13, 2016 12:30, sampling point TF080 Selenium 1045 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 13, 2016 12:30, sampling point TF080 Antimony, Total 1074 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 13, 2016 12:30, sampling point TF080 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 13, 2016 12:30, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Collected
Nov 15, 2016 11:20
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
201611160511
Laboratory
Eea Laboratories
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 15, 2016 11:20, sampling point TF080 Dalapon 2031 EPA method 515.4 Not recorded
Not detected below 5 ug/l Minimum Reporting Level , sample collected Nov 15, 2016 11:20, sampling point TF080 Endothall 2033 EPA method 548.1 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Nov 15, 2016 11:20, sampling point TF080 Picloram 2040 EPA method 515.4 Not recorded
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Nov 15, 2016 11:20, sampling point TF080 Dinoseb 2041 EPA method 515.4 Not recorded
Not detected below 0.005 ng/l Minimum Reporting Level , sample collected Nov 15, 2016 11:20, 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 Nov 15, 2016 11:20, sampling point TF080 2,4-D 2105 EPA method 515.4 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Nov 15, 2016 11:20, 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 Nov 15, 2016 11:20, 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 Nov 15, 2016 11:20, 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 Nov 15, 2016 11:20, sampling point TF080 Dichlorprop 2206 EPA method 515.4 Not recorded
Not detected below 0.04 ug/l Minimum Reporting Level , sample collected Nov 15, 2016 11:20, sampling point TF080 Pentachlorophenol 2326 EPA method 515.4 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Nov 15, 2016 11:20, sampling point TF080 Dicamba 2440 EPA method 515.4 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 15, 2016 11:20, sampling point TF080 Bentazon 2625 EPA method 515.4 Not recorded
Collected
Oct 18, 2016 01:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
161019-001S1
Laboratory
MSDH Lab
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Oct 18, 2016 01:00, 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 Oct 18, 2016 01:00, sampling point TF080 Ethylene Dibromide 2946 EPA method 504.1 Not recorded
Collected
Sep 27, 2016 12:45
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
160928-008S1
Laboratory
MSDH Lab
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Sep 27, 2016 12:45, 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 27, 2016 12:45, sampling point TF080 Ethylene Dibromide 2946 EPA method 504.1 Not recorded
Collected
Sep 27, 2016 12:40
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
160928-001S7
Laboratory
MSDH Lab
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Sep 27, 2016 12:40, sampling point TF080 Oxamyl 2036 EPA method 531.2 Not recorded
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Sep 27, 2016 12:40, sampling point TF080 Aldicarb Sulfoxide 2043 EPA method 531.2 Not recorded
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Sep 27, 2016 12:40, sampling point TF080 Aldicarb Sulfone 2044 EPA method 531.2 Not recorded
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Sep 27, 2016 12:40, sampling point TF080 Carbofuran 2046 EPA method 531.2 Not recorded
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Sep 27, 2016 12:40, sampling point TF080 Aldicarb 2047 EPA method 531.2 Not recorded
Collected
Sep 6, 2016 01:30
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
160907-005VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2016 01:30, sampling point TF080 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2016 01:30, sampling point TF080 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2016 01:30, sampling point TF080 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2016 01:30, sampling point TF080 Dichloromethane 2964 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2016 01:30, sampling point TF080 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2016 01:30, sampling point TF080 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2016 01:30, sampling point TF080 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2016 01:30, sampling point TF080 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2016 01:30, sampling point TF080 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2016 01:30, sampling point TF080 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2016 01:30, sampling point TF080 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2016 01:30, sampling point TF080 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2016 01:30, sampling point TF080 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2016 01:30, sampling point TF080 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2016 01:30, sampling point TF080 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2016 01:30, sampling point TF080 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2016 01:30, sampling point TF080 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2016 01:30, sampling point TF080 Benzene 2990 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2016 01:30, sampling point TF080 Toluene 2991 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2016 01:30, sampling point TF080 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 6, 2016 01:30, sampling point TF080 Styrene 2996 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016

Routine (10).