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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 111–120 of 232 samples, newest first — collected August 6, 2013 to October 7, 2013. The summary above covers all 232.

52 results from the 10 samples listed here: 0 detected, 52 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 111 to 120 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
Oct 7, 2013 02:30
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
131008-017S5
Laboratory
MSDH Lab
Not detected below 0.01 ug/l Minimum Reporting Level , sample collected Oct 7, 2013 02:30, sampling point TF080 Endrin 2005 EPA method 505 Not recorded
Not detected below 0.01 ug/l Minimum Reporting Level , sample collected Oct 7, 2013 02:30, sampling point TF080 BHC-Gamma 2010 EPA method 505 Not recorded
Not detected below 0.01 ug/l Minimum Reporting Level , sample collected Oct 7, 2013 02:30, sampling point TF080 Methoxychlor 2015 EPA method 505 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Oct 7, 2013 02:30, sampling point TF080 Toxaphene 2020 EPA method 505 Not recorded
Not detected below 0.01 ug/l Minimum Reporting Level , sample collected Oct 7, 2013 02:30, sampling point TF080 Heptachlor 2065 EPA method 505 Not recorded
Not detected below 0.01 ug/l Minimum Reporting Level , sample collected Oct 7, 2013 02:30, sampling point TF080 Heptachlor Epoxide 2067 EPA method 505 Not recorded
Not detected below 0.01 ug/l Minimum Reporting Level , sample collected Oct 7, 2013 02:30, sampling point TF080 Hexachlorobenzene 2274 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Oct 7, 2013 02:30, sampling point TF080 Aroclor 1016 2388 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Oct 7, 2013 02:30, sampling point TF080 Aroclor 1221 2390 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Oct 7, 2013 02:30, sampling point TF080 Aroclor 1232 2392 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Oct 7, 2013 02:30, sampling point TF080 Aroclor 1242 2394 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Oct 7, 2013 02:30, sampling point TF080 Aroclor 1248 2396 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Oct 7, 2013 02:30, sampling point TF080 Aroclor 1254 2398 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Oct 7, 2013 02:30, sampling point TF080 Aroclor 1260 2400 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Oct 7, 2013 02:30, sampling point TF080 Chlordane 2959 EPA method 505 Not recorded
Collected
Sep 30, 2013 02:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
131001-017CN
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Sep 30, 2013 02:00, sampling point TF080 Cyanide 1024 EPA method QC10204001X Jan 1, 2011 – Dec 31, 2013
Collected
Sep 23, 2013 02:30
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
130924-020SC
Laboratory
MSDH Lab
Not detected below 6 ug/l Minimum Reporting Level , sample collected Sep 23, 2013 02:30, sampling point TF080 Glyphosate 2034 EPA method 547 Not recorded
Collected
Sep 16, 2013 02:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
130917-010SA
Laboratory
MSDH Lab
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Sep 16, 2013 02:00, sampling point TF080 Benzo(a)pyrene 2306 EPA method 550.1 Not recorded
Collected
Sep 16, 2013 02:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
130917-009S2
Laboratory
MSDH Lab
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Sep 16, 2013 02:00, 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 16, 2013 02:00, sampling point TF080 Simazine 2037 EPA method 525.2 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Sep 16, 2013 02:00, 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 16, 2013 02:00, sampling point TF080 Atrazine 2050 EPA method 525.2 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Sep 16, 2013 02:00, sampling point TF080 Lasso 2051 EPA method 525.2 Not recorded
Collected
Sep 16, 2013 02:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
130917-028S5
Laboratory
MSDH Lab
Not detected below 0.01 ug/l Minimum Reporting Level , sample collected Sep 16, 2013 02:00, sampling point TF080 Endrin 2005 EPA method 505 Not recorded
Not detected below 0.01 ug/l Minimum Reporting Level , sample collected Sep 16, 2013 02:00, sampling point TF080 BHC-Gamma 2010 EPA method 505 Not recorded
Not detected below 0.01 ug/l Minimum Reporting Level , sample collected Sep 16, 2013 02:00, sampling point TF080 Methoxychlor 2015 EPA method 505 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 16, 2013 02:00, sampling point TF080 Toxaphene 2020 EPA method 505 Not recorded
Not detected below 0.02 ug/l Minimum Reporting Level , sample collected Sep 16, 2013 02:00, sampling point TF080 Hexachlorocyclopentadiene 2042 EPA method 505 Not recorded
Not detected below 0.01 ug/l Minimum Reporting Level , sample collected Sep 16, 2013 02:00, sampling point TF080 Heptachlor 2065 EPA method 505 Not recorded
Not detected below 0.01 ug/l Minimum Reporting Level , sample collected Sep 16, 2013 02:00, sampling point TF080 Heptachlor Epoxide 2067 EPA method 505 Not recorded
Not detected below 0.01 ug/l Minimum Reporting Level , sample collected Sep 16, 2013 02:00, sampling point TF080 Hexachlorobenzene 2274 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Sep 16, 2013 02:00, sampling point TF080 Aroclor 1016 2388 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Sep 16, 2013 02:00, sampling point TF080 Aroclor 1221 2390 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Sep 16, 2013 02:00, sampling point TF080 Aroclor 1232 2392 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Sep 16, 2013 02:00, sampling point TF080 Aroclor 1242 2394 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Sep 16, 2013 02:00, sampling point TF080 Aroclor 1248 2396 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Sep 16, 2013 02:00, sampling point TF080 Aroclor 1254 2398 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Sep 16, 2013 02:00, sampling point TF080 Aroclor 1260 2400 EPA method 505 Not recorded
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Sep 16, 2013 02:00, sampling point TF080 Chlordane 2959 EPA method 505 Not recorded
Collected
Sep 11, 2013 03:00
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
130912-011HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Sep 11, 2013 03:00, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 11, 2013 03:00, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 11, 2013 03:00, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 11, 2013 03:00, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 11, 2013 03:00, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 0.006 mg/l Minimum Reporting Level , sample collected Sep 11, 2013 03:00, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2011 – Dec 31, 2013
Collected
Sep 11, 2013 03:00
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
130912-011TH
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 11, 2013 03:00, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 11, 2013 03:00, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 11, 2013 03:00, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 11, 2013 03:00, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
Not detected below 4 ug/l Minimum Reporting Level , sample collected Sep 11, 2013 03:00, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2011 – Dec 31, 2013
Collected
Aug 6, 2013 14:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
201308071107-SDI
Laboratory
Eurofins Eaton Analytical
Not detected below 0.005 ng/l Minimum Reporting Level , sample collected Aug 6, 2013 14:00, sampling point TF080 2,3,7,8-TCDD 2063 EPA method 1613 Not recorded
Collected
Aug 6, 2013 14:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
201308071107-SEN
Laboratory
Eurofins Eaton Analytical
Not detected below 5 ug/l Minimum Reporting Level , sample collected Aug 6, 2013 14:00, sampling point TF080 Endothall 2033 EPA method 548.1 Not recorded

Routine (10).