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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 411–420 of 742 samples, newest first — collected August 7, 2013 to December 9, 2013. The summary above covers all 742.

62 results from the 10 samples listed here: 18 detected, 44 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.

We withheld the location of 1 sampling point 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 East Madison Water Assn-West, every result from 411 to 420 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
Dec 9, 2013 08:00
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
131210-033HA
Laboratory
MSDH Lab
0.005 mg/l , sample collected Dec 9, 2013 08:00, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.007 mg/l , sample collected Dec 9, 2013 08:00, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.004 mg/l , sample collected Dec 9, 2013 08:00, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
0.029 mg/l , sample collected Dec 9, 2013 08:00, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
0.01 mg/l , sample collected Dec 9, 2013 08:00, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.055 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Dec 9, 2013 08:00, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Oct 1, 2013 – Dec 31, 2013
Collected
Nov 7, 2013 11:00
Sampling point
TF107 Treatment Facility TF107
Sample type
Routine
Lab sample
131108-019VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 11:00, sampling point TF107 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 11:00, sampling point TF107 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 11:00, sampling point TF107 Xylenes, Total 2955 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 11:00, sampling point TF107 Dichloromethane 2964 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 11:00, sampling point TF107 O-Dichlorobenzene 2968 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 11:00, sampling point TF107 P-Dichlorobenzene 2969 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 11:00, sampling point TF107 Vinyl Chloride 2976 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 11:00, sampling point TF107 1,1-Dichloroethylene 2977 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 11:00, sampling point TF107 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 11:00, sampling point TF107 1,2-Dichloroethane 2980 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 11:00, sampling point TF107 1,1,1-Trichloroethane 2981 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 11:00, sampling point TF107 Carbon Tetrachloride 2982 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 11:00, sampling point TF107 1,2-Dichloropropane 2983 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 11:00, sampling point TF107 Trichloroethylene 2984 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 11:00, sampling point TF107 1,1,2-Trichloroethane 2985 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 11:00, sampling point TF107 Tetrachloroethylene 2987 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 11:00, sampling point TF107 Chlorobenzene 2989 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 11:00, sampling point TF107 Benzene 2990 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 11:00, sampling point TF107 Toluene 2991 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 11:00, sampling point TF107 Ethylbenzene 2992 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 11:00, sampling point TF107 Styrene 2996 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Collected
Nov 7, 2013 10:00
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
131108-018VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 10:00, sampling point TF103 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 10:00, sampling point TF103 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 10:00, sampling point TF103 Xylenes, Total 2955 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 10:00, sampling point TF103 Dichloromethane 2964 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 10:00, sampling point TF103 O-Dichlorobenzene 2968 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 10:00, sampling point TF103 P-Dichlorobenzene 2969 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 10:00, sampling point TF103 Vinyl Chloride 2976 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 10:00, sampling point TF103 1,1-Dichloroethylene 2977 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 10:00, sampling point TF103 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 10:00, sampling point TF103 1,2-Dichloroethane 2980 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 10:00, sampling point TF103 1,1,1-Trichloroethane 2981 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 10:00, sampling point TF103 Carbon Tetrachloride 2982 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 10:00, sampling point TF103 1,2-Dichloropropane 2983 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 10:00, sampling point TF103 Trichloroethylene 2984 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 10:00, sampling point TF103 1,1,2-Trichloroethane 2985 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 10:00, sampling point TF103 Tetrachloroethylene 2987 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 10:00, sampling point TF103 Chlorobenzene 2989 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 10:00, sampling point TF103 Benzene 2990 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 10:00, sampling point TF103 Toluene 2991 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 10:00, sampling point TF103 Ethylbenzene 2992 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 7, 2013 10:00, sampling point TF103 Styrene 2996 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Collected
Aug 7, 2013 07:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130808-074PB
Laboratory
MSDH Lab
0.0156 mg/l , sample collected Aug 7, 2013 07:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.002 mg/l , sample collected Aug 7, 2013 07:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Aug 7, 2013 09:42
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130808-073PB
Laboratory
MSDH Lab
0.0538 mg/l , sample collected Aug 7, 2013 09:42, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.0012 mg/l , sample collected Aug 7, 2013 09:42, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Aug 7, 2013 05:16
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130808-072PB
Laboratory
MSDH Lab
0.4478 mg/l , sample collected Aug 7, 2013 05:16, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.0007 mg/l , sample collected Aug 7, 2013 05:16, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Aug 7, 2013 05:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130808-071PB
Laboratory
MSDH Lab
0.1129 mg/l , sample collected Aug 7, 2013 05:30, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.0006 mg/l , sample collected Aug 7, 2013 05:30, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Aug 7, 2013 09:22
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130808-070PB
Laboratory
MSDH Lab
0.0352 mg/l , sample collected Aug 7, 2013 09:22, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 7, 2013 09:22, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Aug 7, 2013 09:07
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130808-069PB
Laboratory
MSDH Lab
0.2122 mg/l , sample collected Aug 7, 2013 09:07, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.0007 mg/l , sample collected Aug 7, 2013 09:07, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Aug 7, 2013 06:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130808-068PB
Laboratory
MSDH Lab
0.0664 mg/l , sample collected Aug 7, 2013 06:30, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 7, 2013 06:30, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013

Routine (10).