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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

MS0450007 , East Madison Water Assn-West

37 of the 61 analytes this system has been tested for have been detected at least once, across 742 samples on record.

The other 24 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 742 samples on record, detections range from October 6, 2003 to August 12, 2025. 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 East Madison Water Assn-West, 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 159 of 159 results Jun 17, 2004 Jul 30, 2024
Lead 1030 Inorganic Chemical 110 of 159 results Jun 17, 2004 Jul 29, 2024
TTHM 2950 Organic Chemical 104 of 104 results Jul 13, 2004 Aug 12, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 101 of 101 results Jul 13, 2004 Aug 12, 2025
Chloroform 2941 Organic Chemical 87 of 87 results Jun 12, 2007 Aug 12, 2025
Bromodichloromethane 2943 Organic Chemical 87 of 87 results Jun 12, 2007 Aug 12, 2025
Dichloroacetic Acid 2451 Organic Chemical 85 of 86 results Feb 26, 2008 Aug 12, 2025
Trichloroacetic Acid 2452 Organic Chemical 85 of 86 results Feb 26, 2008 Aug 12, 2025
Barium 1010 Inorganic Chemical 45 of 45 results Oct 6, 2003 Mar 11, 2025
Fluoride 1025 Inorganic Chemical 45 of 45 results Oct 6, 2003 Mar 11, 2025
Chromium 1020 Inorganic Chemical 31 of 45 results Oct 6, 2003 Jan 11, 2024
Dibromochloromethane 2944 Organic Chemical 26 of 87 results Dec 9, 2013 Aug 12, 2025
Bromoform 2942 Organic Chemical 22 of 87 results Dec 9, 2013 Aug 12, 2025
Dibromoacetic Acid 2454 Organic Chemical 21 of 86 results Dec 9, 2013 Dec 1, 2020
Monochloroacetic Acid 2450 Organic Chemical 21 of 86 results Dec 2, 2009 Jul 9, 2020
Gross Alpha, Incl. Radon & U 4002 Radionuclide 20 of 20 results Mar 13, 2012 Oct 12, 2012
Sodium 1052 Inorganic Chemical 15 of 15 results Sep 24, 2019 Feb 25, 2025
Monobromoacetic Acid 2453 Organic Chemical 13 of 86 results Feb 26, 2008 Sep 1, 2020
Nickel 1036 Inorganic Chemical 11 of 45 results Oct 6, 2003 Apr 9, 2019
Xylenes, Total 2955 Organic Chemical 9 of 79 results Feb 16, 2005 Apr 30, 2013
Gross Alpha, Excl. Radon & U 4000 Radionuclide 9 of 9 results Sep 22, 2009 Apr 3, 2012
Combined Radium (-226 & -228) 4010 Radionuclide 9 of 33 results Sep 22, 2009 Apr 3, 2012
Gross Alpha Particle Activity 4109 Radionuclide 9 of 13 results Sep 22, 2009 Apr 3, 2012
Radium-228 4030 Radionuclide 8 of 33 results Sep 22, 2009 Apr 3, 2012
Selenium 1045 Inorganic Chemical 7 of 45 results Dec 12, 2005 Apr 28, 2020
Radium-226 4020 Radionuclide 7 of 33 results Sep 22, 2009 Mar 12, 2010
Arsenic 1005 Inorganic Chemical 6 of 45 results Dec 12, 2005 Feb 13, 2024
Gross Beta Particle Activity 4100 Radionuclide 6 of 6 results Sep 22, 2009 Mar 12, 2010
Sulfate 1055 Inorganic Chemical 5 of 6 results Oct 6, 2003 Mar 10, 2004
Nitrite 1041 Inorganic Chemical 4 of 101 results Aug 15, 2005 Feb 28, 2023
Ethylbenzene 2992 Organic Chemical 3 of 79 results Feb 16, 2005 Oct 2, 2012
Antimony, Total 1074 Inorganic Chemical 2 of 45 results Mar 31, 2014 Mar 31, 2014
Thallium, Total 1085 Inorganic Chemical 1 of 45 results Apr 28, 2020 Apr 28, 2020
Carbon Tetrachloride 2982 Organic Chemical 1 of 79 results Apr 30, 2013 Apr 30, 2013
Cadmium 1015 Inorganic Chemical 1 of 45 results Dec 12, 2005 Dec 12, 2005
Cyanide 1024 Inorganic Chemical 1 of 42 results Apr 4, 2005 Apr 4, 2005
Dichloromethane 2964 Organic Chemical 1 of 79 results Aug 10, 2004 Aug 10, 2004

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 481–490 of 742 samples, newest first — collected May 23, 2012 to August 7, 2012. The summary above covers all 742.

52 results from the 10 samples listed here: 9 detected, 43 not detected. Across the whole record it is 1,177 of 4,007. 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 East Madison Water Assn-West, every result from 481 to 490 of 742 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 7, 2012 12:00
Sampling point
TF104 Treatment Plant T104
Sample type
Routine
Lab sample
120808-030RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 7, 2012 12:00, sampling point TF104 Combined Uranium 4006 EPA method 200.8 Jul 1, 2012 – Sep 30, 2012
Collected
Aug 7, 2012 12:30
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
120808-029RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 7, 2012 12:30, sampling point TF103 Combined Uranium 4006 EPA method 200.8 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 11, 2012 10:00
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
120712-003IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 10:00, sampling point TF103 Arsenic 1005 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.00507 mg/l , sample collected Jul 11, 2012 10:00, sampling point TF103 Barium 1010 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 10:00, sampling point TF103 Cadmium 1015 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 10:00, sampling point TF103 Chromium 1020 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.991 mg/l , sample collected Jul 11, 2012 10:00, sampling point TF103 Fluoride 1025 EPA method 380-75WE Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 10:00, sampling point TF103 Mercury 1035 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 10:00, sampling point TF103 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 10:00, sampling point TF103 Selenium 1045 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 10:00, sampling point TF103 Antimony, Total 1074 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 10:00, sampling point TF103 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 10:00, sampling point TF103 Thallium, Total 1085 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Jul 11, 2012 10:30
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
120712-002IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 10:30, sampling point TF103 Arsenic 1005 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.00533 mg/l , sample collected Jul 11, 2012 10:30, sampling point TF103 Barium 1010 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 10:30, sampling point TF103 Cadmium 1015 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 10:30, sampling point TF103 Chromium 1020 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
1.02 mg/l , sample collected Jul 11, 2012 10:30, sampling point TF103 Fluoride 1025 EPA method 380-75WE Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 10:30, sampling point TF103 Mercury 1035 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 10:30, sampling point TF103 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 10:30, sampling point TF103 Selenium 1045 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 10:30, sampling point TF103 Antimony, Total 1074 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 10:30, sampling point TF103 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 10:30, sampling point TF103 Thallium, Total 1085 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Jul 11, 2012 01:00
Sampling point
TF105 Treatment Plant T105
Sample type
Routine
Lab sample
120712-001IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:00, sampling point TF105 Arsenic 1005 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.01021 mg/l , sample collected Jul 11, 2012 01:00, sampling point TF105 Barium 1010 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:00, sampling point TF105 Cadmium 1015 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:00, sampling point TF105 Chromium 1020 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.935 mg/l , sample collected Jul 11, 2012 01:00, sampling point TF105 Fluoride 1025 EPA method 380-75WE Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:00, sampling point TF105 Mercury 1035 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:00, sampling point TF105 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:00, sampling point TF105 Selenium 1045 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:00, sampling point TF105 Antimony, Total 1074 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:00, sampling point TF105 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:00, sampling point TF105 Thallium, Total 1085 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Jun 19, 2012 13:40
Sampling point
TF107 Treatment Facility TF107
Sample type
Routine
Lab sample
120620-010
Laboratory
Radiation Safety Engineering
Not detected below 0.354 pci/l Minimum Reporting Level , sample collected Jun 19, 2012 13:40, sampling point TF107 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.354 pci/l Minimum Reporting Level , sample collected Jun 19, 2012 13:40, sampling point TF107 Radium-226 4020 EPA method 903.1 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.31 pci/l Minimum Reporting Level , sample collected Jun 19, 2012 13:40, sampling point TF107 Radium-228 4030 EPA method 904 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.46 pci/l Minimum Reporting Level , sample collected Jun 19, 2012 13:40, sampling point TF107 Gross Alpha Particle Activity 4109 EPA method 00-02 Apr 1, 2012 – Jun 30, 2012
Collected
Jun 19, 2012 13:40
Sampling point
TF107 Treatment Facility TF107
Sample type
Routine
Lab sample
120620-010RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 19, 2012 13:40, sampling point TF107 Combined Uranium 4006 EPA method 200.8 Apr 1, 2012 – Jun 30, 2012
Collected
May 23, 2012 12:28
Sampling point
TF104 Treatment Plant T104
Sample type
Routine
Lab sample
120524-004
Laboratory
Radiation Safety Engineering
1 pci/l , sample collected May 23, 2012 12:28, sampling point TF104 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.49 pci/l Minimum Reporting Level , sample collected May 23, 2012 12:28, sampling point TF104 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.3 pci/l Minimum Reporting Level , sample collected May 23, 2012 12:28, sampling point TF104 Radium-226 4020 EPA method 903.1 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.49 pci/l Minimum Reporting Level , sample collected May 23, 2012 12:28, sampling point TF104 Radium-228 4030 EPA method 904.0 Apr 1, 2012 – Jun 30, 2012
Collected
May 23, 2012 12:52
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
120524-003
Laboratory
Radiation Safety Engineering
0.9 pci/l , sample collected May 23, 2012 12:52, sampling point TF103 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.46 pci/l Minimum Reporting Level , sample collected May 23, 2012 12:52, sampling point TF103 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.258 pci/l Minimum Reporting Level , sample collected May 23, 2012 12:52, sampling point TF103 Radium-226 4020 EPA method 903.1 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.46 pci/l Minimum Reporting Level , sample collected May 23, 2012 12:52, sampling point TF103 Radium-228 4030 EPA method 904.0 Apr 1, 2012 – Jun 30, 2012
Collected
May 23, 2012 12:04
Sampling point
TF105 Treatment Plant T105
Sample type
Routine
Lab sample
120524-011
Laboratory
Radiation Safety Engineering
1.5 pci/l , sample collected May 23, 2012 12:04, sampling point TF105 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.566 pci/l Minimum Reporting Level , sample collected May 23, 2012 12:04, sampling point TF105 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.566 pci/l Minimum Reporting Level , sample collected May 23, 2012 12:04, sampling point TF105 Radium-226 4020 EPA method 903.1 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.54 pci/l Minimum Reporting Level , sample collected May 23, 2012 12:04, sampling point TF105 Radium-228 4030 EPA method 904.0 Apr 1, 2012 – Jun 30, 2012

Routine (10).